/(a)b|/I
Capturing subpattern count = 1
No options
No first char
No need char
/abc/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
abc
0: abc
defabc
0: abc
\Aabc
0: abc
*** Failers
No match
\Adefabc
No match
ABC
No match
/^abc/I
Capturing subpattern count = 0
Options: anchored
No first char
No need char
abc
0: abc
\Aabc
0: abc
*** Failers
No match
defabc
No match
\Adefabc
No match
/a+bc/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
Need char = 'c'
/a*bc/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
Need char = 'c'
/a{3}bc/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
Need char = 'c'
/(abc|a+z)/I
Capturing subpattern count = 1
Partial matching not supported
No options
First char = 'a'
No need char
/^abc$/I
Capturing subpattern count = 0
Options: anchored
No first char
No need char
abc
0: abc
*** Failers
No match
def\nabc
No match
/ab\hdef/X
Failed: unrecognized character follows \ at offset 3
/(?X)ab\hdef/X
Failed: unrecognized character follows \ at offset 7
/x{5,4}/
Failed: numbers out of order in {} quantifier at offset 5
/z{65536}/
Failed: number too big in {} quantifier at offset 7
/[abcd/
Failed: missing terminating ] for character class at offset 5
/(?X)[\B]/
Failed: invalid escape sequence in character class at offset 6
/[z-a]/
Failed: range out of order in character class at offset 3
/^*/
Failed: nothing to repeat at offset 1
/(abc/
Failed: missing ) at offset 4
/(?# abc/
Failed: missing ) after comment at offset 7
/(?z)abc/
Failed: unrecognized character after (? at offset 2
/.*b/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char at start or follows newline
Need char = 'b'
/.*?b/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char at start or follows newline
Need char = 'b'
/cat|dog|elephant/I
Capturing subpattern count = 0
No options
No first char
No need char
this sentence eventually mentions a cat
0: cat
this sentences rambles on and on for a while and then reaches elephant
0: elephant
/cat|dog|elephant/IS
Capturing subpattern count = 0
No options
No first char
No need char
Starting byte set: c d e
this sentence eventually mentions a cat
0: cat
this sentences rambles on and on for a while and then reaches elephant
0: elephant
/cat|dog|elephant/IiS
Capturing subpattern count = 0
Options: caseless
No first char
No need char
Starting byte set: C D E c d e
this sentence eventually mentions a CAT cat
0: CAT
this sentences rambles on and on for a while to elephant ElePhant
0: elephant
/a|[bcd]/IS
Capturing subpattern count = 0
No options
No first char
No need char
Starting byte set: a b c d
/(a|[^\dZ])/IS
Capturing subpattern count = 1
No options
No first char
No need char
Starting byte set: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
\x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
\x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / : ; < = >
? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y [ \ ] ^ _ ` a b c d
e f g h i j k l m n o p q r s t u v w x y z { | } ~ \x7f \x80 \x81 \x82 \x83
\x84 \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f \x90 \x91 \x92
\x93 \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e \x9f \xa0 \xa1
\xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad \xae \xaf \xb0
\xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc \xbd \xbe \xbf
\xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc \xcd \xce
\xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb \xdc \xdd
\xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea \xeb \xec
\xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa \xfb
\xfc \xfd \xfe \xff
/(a|b)*[\s]/IS
Capturing subpattern count = 1
No options
No first char
No need char
Starting byte set: \x09 \x0a \x0c \x0d \x20 a b
/(ab\2)/
Failed: reference to non-existent subpattern at offset 6
/{4,5}abc/
Failed: nothing to repeat at offset 4
/(a)(b)(c)\2/I
Capturing subpattern count = 3
Max back reference = 2
No options
First char = 'a'
Need char = 'c'
abcb
0: abcb
1: a
2: b
3: c
\O0abcb
Matched, but too many substrings
\O3abcb
Matched, but too many substrings
0: abcb
\O6abcb
Matched, but too many substrings
0: abcb
1: a
\O9abcb
Matched, but too many substrings
0: abcb
1: a
2: b
\O12abcb
0: abcb
1: a
2: b
3: c
/(a)bc|(a)(b)\2/I
Capturing subpattern count = 3
Max back reference = 2
No options
First char = 'a'
No need char
abc
0: abc
1: a
\O0abc
Matched, but too many substrings
\O3abc
Matched, but too many substrings
0: abc
\O6abc
0: abc
1: a
aba
0: aba
1: <unset>
2: a
3: b
\O0aba
Matched, but too many substrings
\O3aba
Matched, but too many substrings
0: aba
\O6aba
Matched, but too many substrings
0: aba
1: <unset>
\O9aba
Matched, but too many substrings
0: aba
1: <unset>
2: a
\O12aba
0: aba
1: <unset>
2: a
3: b
/abc$/IE
Capturing subpattern count = 0
Options: dollar_endonly
First char = 'a'
Need char = 'c'
abc
0: abc
*** Failers
No match
abc\n
No match
abc\ndef
No match
/(a)(b)(c)(d)(e)\6/
Failed: reference to non-existent subpattern at offset 17
/the quick brown fox/I
Capturing subpattern count = 0
No options
First char = 't'
Need char = 'x'
the quick brown fox
0: the quick brown fox
this is a line with the quick brown fox
0: the quick brown fox
/the quick brown fox/IA
Capturing subpattern count = 0
Options: anchored
No first char
No need char
the quick brown fox
0: the quick brown fox
*** Failers
No match
this is a line with the quick brown fox
No match
/ab(?z)cd/
Failed: unrecognized character after (? at offset 4
/^abc|def/I
Capturing subpattern count = 0
No options
No first char
No need char
abcdef
0: abc
abcdef\B
0: def
/.*((abc)$|(def))/I
Capturing subpattern count = 3
Partial matching not supported
No options
First char at start or follows newline
No need char
defabc
0: defabc
1: abc
2: abc
\Zdefabc
0: def
1: def
2: <unset>
3: def
/abc/IP
abc
0: abc
*** Failers
No match: POSIX code 17: match failed
/^abc|def/IP
abcdef
0: abc
abcdef\B
0: def
/.*((abc)$|(def))/IP
defabc
0: defabc
1: abc
2: abc
\Zdefabc
0: def
1: def
3: def
/the quick brown fox/IP
the quick brown fox
0: the quick brown fox
*** Failers
No match: POSIX code 17: match failed
The Quick Brown Fox
No match: POSIX code 17: match failed
/the quick brown fox/IPi
the quick brown fox
0: the quick brown fox
The Quick Brown Fox
0: The Quick Brown Fox
/abc.def/IP
*** Failers
No match: POSIX code 17: match failed
abc\ndef
No match: POSIX code 17: match failed
/abc$/IP
abc
0: abc
abc\n
0: abc
/(abc)\2/IP
Failed: POSIX code 15: bad back reference at offset 7
/(abc\1)/IP
abc
No match: POSIX code 17: match failed
/)/
Failed: unmatched parentheses at offset 0
/a[]b/
Failed: missing terminating ] for character class at offset 4
/[^aeiou ]{3,}/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
co-processors, and for
0: -pr
/<.*>/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = '<'
Need char = '>'
abc<def>ghi<klm>nop
0: <def>ghi<klm>
/<.*?>/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = '<'
Need char = '>'
abc<def>ghi<klm>nop
0: <def>
/<.*>/IU
Capturing subpattern count = 0
Partial matching not supported
Options: ungreedy
First char = '<'
Need char = '>'
abc<def>ghi<klm>nop
0: <def>
/(?U)<.*>/I
Capturing subpattern count = 0
Partial matching not supported
Options: ungreedy
First char = '<'
Need char = '>'
abc<def>ghi<klm>nop
0: <def>
/<.*?>/IU
Capturing subpattern count = 0
Partial matching not supported
Options: ungreedy
First char = '<'
Need char = '>'
abc<def>ghi<klm>nop
0: <def>ghi<klm>
/={3,}/IU
Capturing subpattern count = 0
Partial matching not supported
Options: ungreedy
First char = '='
Need char = '='
abc========def
0: ===
/(?U)={3,}?/I
Capturing subpattern count = 0
Partial matching not supported
Options: ungreedy
First char = '='
Need char = '='
abc========def
0: ========
/(?<!bar|cattle)foo/I
Capturing subpattern count = 0
No options
First char = 'f'
Need char = 'o'
foo
0: foo
catfoo
0: foo
*** Failers
No match
the barfoo
No match
and cattlefoo
No match
/(?<=a+)b/
Failed: lookbehind assertion is not fixed length at offset 6
/(?<=aaa|b{0,3})b/
Failed: lookbehind assertion is not fixed length at offset 14
/(?<!(foo)a\1)bar/
Failed: lookbehind assertion is not fixed length at offset 12
/(?i)abc/I
Capturing subpattern count = 0
Options: caseless
First char = 'a' (caseless)
Need char = 'c' (caseless)
/(a|(?m)a)/I
Capturing subpattern count = 1
No options
First char = 'a'
No need char
/(?i)^1234/I
Capturing subpattern count = 0
Options: anchored caseless
No first char
No need char
/(^b|(?i)^d)/I
Capturing subpattern count = 1
Options: anchored
No first char
No need char
/(?s).*/I
Capturing subpattern count = 0
Partial matching not supported
Options: anchored dotall
No first char
No need char
/[abcd]/IS
Capturing subpattern count = 0
No options
No first char
No need char
Starting byte set: a b c d
/(?i)[abcd]/IS
Capturing subpattern count = 0
Options: caseless
No first char
No need char
Starting byte set: A B C D a b c d
/(?m)[xy]|(b|c)/IS
Capturing subpattern count = 1
Options: multiline
No first char
No need char
Starting byte set: b c x y
/(^a|^b)/Im
Capturing subpattern count = 1
Options: multiline
First char at start or follows newline
No need char
/(?i)(^a|^b)/Im
Capturing subpattern count = 1
Options: caseless multiline
First char at start or follows newline
No need char
/(a)(?(1)a|b|c)/
Failed: conditional group contains more than two branches at offset 13
/(?(?=a)a|b|c)/
Failed: conditional group contains more than two branches at offset 12
/(?(1a)/
Failed: missing ) at offset 6
/(?(1a))/
Failed: reference to non-existent subpattern at offset 6
/(?(?i))/
Failed: assertion expected after (?( at offset 3
/(?(abc))/
Failed: reference to non-existent subpattern at offset 7
/(?(?<ab))/
Failed: syntax error in subpattern name (missing terminator) at offset 7
/((?s)blah)\s+\1/I
Capturing subpattern count = 1
Max back reference = 1
Partial matching not supported
No options
First char = 'b'
Need char = 'h'
/((?i)blah)\s+\1/I
Capturing subpattern count = 1
Max back reference = 1
Partial matching not supported
No options
First char = 'b' (caseless)
Need char = 'h' (caseless)
/((?i)b)/IDS
------------------------------------------------------------------
0 17 Bra 0
3 9 Bra 1
8 01 Opt
10 NC b
12 9 Ket
15 00 Opt
17 17 Ket
20 End
------------------------------------------------------------------
Capturing subpattern count = 1
No options
First char = 'b' (caseless)
No need char
Study returned NULL
/(a*b|(?i:c*(?-i)d))/IS
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
Starting byte set: C a b c d
/a$/I
Capturing subpattern count = 0
No options
First char = 'a'
No need char
a
0: a
a\n
0: a
*** Failers
No match
\Za
No match
\Za\n
No match
/a$/Im
Capturing subpattern count = 0
Options: multiline
First char = 'a'
No need char
a
0: a
a\n
0: a
\Za\n
0: a
*** Failers
No match
\Za
No match
/\Aabc/Im
Capturing subpattern count = 0
Options: anchored multiline
No first char
No need char
/^abc/Im
Capturing subpattern count = 0
Options: multiline
First char at start or follows newline
Need char = 'c'
/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/I
Capturing subpattern count = 5
Partial matching not supported
Options: anchored
No first char
No need char
aaaaabbbbbcccccdef
0: aaaaabbbbbcccccdef
1: aaaaabbbbbcccccdef
2: aaaaa
3: b
4: bbbbccccc
5: def
/(?<=foo)[ab]/IS
Capturing subpattern count = 0
No options
No first char
No need char
Starting byte set: a b
/(?<!foo)(alpha|omega)/IS
Capturing subpattern count = 1
No options
No first char
Need char = 'a'
Starting byte set: a o
/(?!alphabet)[ab]/IS
Capturing subpattern count = 0
No options
No first char
No need char
Starting byte set: a b
/(?<=foo\n)^bar/Im
Capturing subpattern count = 0
Options: multiline
No first char
Need char = 'r'
foo\nbarbar
0: bar
***Failers
No match
rhubarb
No match
barbell
No match
abc\nbarton
No match
/^(?<=foo\n)bar/Im
Capturing subpattern count = 0
Options: multiline
First char at start or follows newline
Need char = 'r'
foo\nbarbar
0: bar
***Failers
No match
rhubarb
No match
barbell
No match
abc\nbarton
No match
/(?>^abc)/Im
Capturing subpattern count = 0
Options: multiline
First char at start or follows newline
Need char = 'c'
abc
0: abc
def\nabc
0: abc
*** Failers
No match
defabc
No match
/(?<=ab(c+)d)ef/
Failed: lookbehind assertion is not fixed length at offset 11
/(?<=ab(?<=c+)d)ef/
Failed: lookbehind assertion is not fixed length at offset 12
/(?<=ab(c|de)f)g/
Failed: lookbehind assertion is not fixed length at offset 13
/The next three are in testinput2 because they have variable length branches/
/(?<=bullock|donkey)-cart/I
Capturing subpattern count = 0
No options
First char = '-'
Need char = 't'
the bullock-cart
0: -cart
a donkey-cart race
0: -cart
*** Failers
No match
cart
No match
horse-and-cart
No match
/(?<=ab(?i)x|y|z)/I
Capturing subpattern count = 0
No options
No first char
No need char
/(?>.*)(?<=(abcd)|(xyz))/I
Capturing subpattern count = 2
Partial matching not supported
No options
First char at start or follows newline
No need char
alphabetabcd
0: alphabetabcd
1: abcd
endingxyz
0: endingxyz
1: <unset>
2: xyz
/(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/I
Capturing subpattern count = 0
No options
First char = 'Z'
Need char = 'Z'
abxyZZ
0: ZZ
abXyZZ
0: ZZ
ZZZ
0: ZZ
zZZ
0: ZZ
bZZ
0: ZZ
BZZ
0: ZZ
*** Failers
No match
ZZ
No match
abXYZZ
No match
zzz
No match
bzz
No match
/(?<!(foo)a)bar/I
Capturing subpattern count = 1
No options
First char = 'b'
Need char = 'r'
bar
0: bar
foobbar
0: bar
*** Failers
No match
fooabar
No match
/This one is here because Perl 5.005_02 doesn't fail it/I
Capturing subpattern count = 0
No options
First char = 'T'
Need char = 't'
/^(a)?(?(1)a|b)+$/I
Capturing subpattern count = 1
Options: anchored
No first char
No need char
*** Failers
No match
a
No match
/This one is here because I think Perl 5.005_02 gets the setting of $1 wrong/I
Capturing subpattern count = 0
No options
First char = 'T'
Need char = 'g'
/^(a\1?){4}$/I
Capturing subpattern count = 1
Max back reference = 1
Options: anchored
No first char
No need char
aaaaaa
0: aaaaaa
1: aa
/These are syntax tests from Perl 5.005/I
Capturing subpattern count = 0
No options
First char = 'T'
Need char = '5'
/a[b-a]/
Failed: range out of order in character class at offset 4
/a[]b/
Failed: missing terminating ] for character class at offset 4
/a[/
Failed: missing terminating ] for character class at offset 2
/*a/
Failed: nothing to repeat at offset 0
/(*)b/
Failed: nothing to repeat at offset 1
/abc)/
Failed: unmatched parentheses at offset 3
/(abc/
Failed: missing ) at offset 4
/a**/
Failed: nothing to repeat at offset 2
/)(/
Failed: unmatched parentheses at offset 0
/\1/
Failed: reference to non-existent subpattern at offset 2
/\2/
Failed: reference to non-existent subpattern at offset 2
/(a)|\2/
Failed: reference to non-existent subpattern at offset 6
/a[b-a]/Ii
Failed: range out of order in character class at offset 4
/a[]b/Ii
Failed: missing terminating ] for character class at offset 4
/a[/Ii
Failed: missing terminating ] for character class at offset 2
/*a/Ii
Failed: nothing to repeat at offset 0
/(*)b/Ii
Failed: nothing to repeat at offset 1
/abc)/Ii
Failed: unmatched parentheses at offset 3
/(abc/Ii
Failed: missing ) at offset 4
/a**/Ii
Failed: nothing to repeat at offset 2
/)(/Ii
Failed: unmatched parentheses at offset 0
/:(?:/
Failed: missing ) at offset 4
/(?<%)b/
Failed: unrecognized character after (?< at offset 3
/a(?{)b/
Failed: unrecognized character after (? at offset 3
/a(?{{})b/
Failed: unrecognized character after (? at offset 3
/a(?{}})b/
Failed: unrecognized character after (? at offset 3
/a(?{"{"})b/
Failed: unrecognized character after (? at offset 3
/a(?{"{"}})b/
Failed: unrecognized character after (? at offset 3
/(?(1?)a|b)/
Failed: malformed number or name after (?( at offset 4
/(?(1)a|b|c)/
Failed: conditional group contains more than two branches at offset 10
/[a[:xyz:/
Failed: missing terminating ] for character class at offset 8
/(?<=x+)y/
Failed: lookbehind assertion is not fixed length at offset 6
/a{37,17}/
Failed: numbers out of order in {} quantifier at offset 7
/abc/\
Failed: \ at end of pattern at offset 4
/abc/\P
Failed: POSIX code 9: bad escape sequence at offset 4
/abc/\i
Failed: \ at end of pattern at offset 4
/(a)bc(d)/I
Capturing subpattern count = 2
No options
First char = 'a'
Need char = 'd'
abcd
0: abcd
1: a
2: d
abcd\C2
0: abcd
1: a
2: d
2C d (1)
abcd\C5
0: abcd
1: a
2: d
copy substring 5 failed -7
/(.{20})/I
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
abcdefghijklmnopqrstuvwxyz
0: abcdefghijklmnopqrst
1: abcdefghijklmnopqrst
abcdefghijklmnopqrstuvwxyz\C1
0: abcdefghijklmnopqrst
1: abcdefghijklmnopqrst
1C abcdefghijklmnopqrst (20)
abcdefghijklmnopqrstuvwxyz\G1
0: abcdefghijklmnopqrst
1: abcdefghijklmnopqrst
1G abcdefghijklmnopqrst (20)
/(.{15})/I
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
abcdefghijklmnopqrstuvwxyz
0: abcdefghijklmno
1: abcdefghijklmno
abcdefghijklmnopqrstuvwxyz\C1\G1
0: abcdefghijklmno
1: abcdefghijklmno
1C abcdefghijklmno (15)
1G abcdefghijklmno (15)
/(.{16})/I
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
abcdefghijklmnopqrstuvwxyz
0: abcdefghijklmnop
1: abcdefghijklmnop
abcdefghijklmnopqrstuvwxyz\C1\G1\L
0: abcdefghijklmnop
1: abcdefghijklmnop
1C abcdefghijklmnop (16)
1G abcdefghijklmnop (16)
0L abcdefghijklmnop
1L abcdefghijklmnop
/^(a|(bc))de(f)/I
Capturing subpattern count = 3
Options: anchored
No first char
No need char
adef\G1\G2\G3\G4\L
0: adef
1: a
2: <unset>
3: f
1G a (1)
2G (0)
3G f (1)
get substring 4 failed -7
0L adef
1L a
2L
3L f
bcdef\G1\G2\G3\G4\L
0: bcdef
1: bc
2: bc
3: f
1G bc (2)
2G bc (2)
3G f (1)
get substring 4 failed -7
0L bcdef
1L bc
2L bc
3L f
adefghijk\C0
0: adef
1: a
2: <unset>
3: f
0C adef (4)
/^abc\00def/I
Capturing subpattern count = 0
Options: anchored
No first char
No need char
abc\00def\L\C0
0: abc\x00def
0C abc (7)
0L abc
/word ((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+
)((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+
)?)?)?)?)?)?)?)?)?otherword/IM
Memory allocation (code space): 448
Capturing subpattern count = 8
Partial matching not supported
No options
First char = 'w'
Need char = 'd'
/.*X/ID
------------------------------------------------------------------
0 7 Bra 0
3 Any*
5 X
7 7 Ket
10 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
No options
First char at start or follows newline
Need char = 'X'
/.*X/IDs
------------------------------------------------------------------
0 7 Bra 0
3 Any*
5 X
7 7 Ket
10 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
Options: anchored dotall
No first char
Need char = 'X'
/(.*X|^B)/ID
------------------------------------------------------------------
0 21 Bra 0
3 9 Bra 1
8 Any*
10 X
12 6 Alt
15 ^
16 B
18 15 Ket
21 21 Ket
24 End
------------------------------------------------------------------
Capturing subpattern count = 1
Partial matching not supported
No options
First char at start or follows newline
No need char
/(.*X|^B)/IDs
------------------------------------------------------------------
0 21 Bra 0
3 9 Bra 1
8 Any*
10 X
12 6 Alt
15 ^
16 B
18 15 Ket
21 21 Ket
24 End
------------------------------------------------------------------
Capturing subpattern count = 1
Partial matching not supported
Options: anchored dotall
No first char
No need char
/(?s)(.*X|^B)/ID
------------------------------------------------------------------
0 21 Bra 0
3 9 Bra 1
8 Any*
10 X
12 6 Alt
15 ^
16 B
18 15 Ket
21 21 Ket
24 End
------------------------------------------------------------------
Capturing subpattern count = 1
Partial matching not supported
Options: anchored dotall
No first char
No need char
/(?s:.*X|^B)/ID
------------------------------------------------------------------
0 25 Bra 0
3 9 Bra 0
6 04 Opt
8 Any*
10 X
12 8 Alt
15 04 Opt
17 ^
18 B
20 17 Ket
23 00 Opt
25 25 Ket
28 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
No options
First char at start or follows newline
No need char
/\Biss\B/I+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
/\Biss\B/I+P
Mississippi
0: iss
0+ issippi
/iss/IG+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
0: iss
0+ ippi
/\Biss\B/IG+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
/\Biss\B/Ig+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
0: iss
0+ ippi
*** Failers
No match
Mississippi\A
No match
/(?<=[Ms])iss/Ig+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
0: iss
0+ ippi
/(?<=[Ms])iss/IG+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
/^iss/Ig+
Capturing subpattern count = 0
Options: anchored
No first char
No need char
ississippi
0: iss
0+ issippi
/.*iss/Ig+
Capturing subpattern count = 0
Partial matching not supported
No options
First char at start or follows newline
Need char = 's'
abciss\nxyzisspqr
0: abciss
0+ \x0axyzisspqr
0: xyziss
0+ pqr
/.i./I+g
Capturing subpattern count = 0
No options
No first char
Need char = 'i'
Mississippi
0: Mis
0+ sissippi
0: sis
0+ sippi
0: sip
0+ pi
Mississippi\A
0: Mis
0+ sissippi
0: sis
0+ sippi
0: sip
0+ pi
Missouri river
0: Mis
0+ souri river
0: ri
0+ river
0: riv
0+ er
Missouri river\A
0: Mis
0+ souri river
/^.is/I+g
Capturing subpattern count = 0
Options: anchored
No first char
No need char
Mississippi
0: Mis
0+ sissippi
/^ab\n/Ig+
Capturing subpattern count = 0
Options: anchored
No first char
No need char
ab\nab\ncd
0: ab\x0a
0+ ab\x0acd
/^ab\n/Img+
Capturing subpattern count = 0
Options: multiline
First char at start or follows newline
Need char = 10
ab\nab\ncd
0: ab\x0a
0+ ab\x0acd
0: ab\x0a
0+ cd
/abc/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
/abc|bac/I
Capturing subpattern count = 0
No options
No first char
Need char = 'c'
/(abc|bac)/I
Capturing subpattern count = 1
No options
No first char
Need char = 'c'
/(abc|(c|dc))/I
Capturing subpattern count = 2
No options
No first char
Need char = 'c'
/(abc|(d|de)c)/I
Capturing subpattern count = 2
No options
No first char
Need char = 'c'
/a*/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
/a+/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
No need char
/(baa|a+)/I
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
Need char = 'a'
/a{0,3}/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
/baa{3,}/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'b'
Need char = 'a'
/"([^\\"]+|\\.)*"/I
Capturing subpattern count = 1
Partial matching not supported
No options
First char = '"'
Need char = '"'
/(abc|ab[cd])/I
Capturing subpattern count = 1
No options
First char = 'a'
No need char
/(a|.)/I
Capturing subpattern count = 1
No options
No first char
No need char
/a|ba|\w/I
Capturing subpattern count = 0
No options
No first char
No need char
/abc(?=pqr)/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'r'
/...(?<=abc)/I
Capturing subpattern count = 0
No options
No first char
No need char
/abc(?!pqr)/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
/ab./I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/ab[xyz]/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/abc*/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
Need char = 'b'
/ab.c*/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
Need char = 'b'
/a.c*/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
No need char
/.c*/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
/ac*/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
No need char
/(a.c*|b.c*)/I
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
/a.c*|aba/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
No need char
/.+a/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
Need char = 'a'
/(?=abcda)a.*/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
Need char = 'a'
/(?=a)a.*/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
No need char
/a(b)*/I
Capturing subpattern count = 1
No options
First char = 'a'
No need char
/a\d*/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
No need char
/ab\d*/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
Need char = 'b'
/a(\d)*/I
Capturing subpattern count = 1
No options
First char = 'a'
No need char
/abcde{0,0}/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'd'
/ab\d+/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
Need char = 'b'
/a(?(1)b)/I
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/a(?(1)bag|big)/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'g'
/a(?(1)bag|big)*/I
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/a(?(1)bag|big)+/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'g'
/a(?(1)b..|b..)/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/ab\d{0}e/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'e'
/a?b?/I
Capturing subpattern count = 0
No options
No first char
No need char
a
0: a
b
0: b
ab
0: ab
\
0:
*** Failers
0:
\N
No match
/|-/I
Capturing subpattern count = 0
No options
No first char
No need char
abcd
0:
-abc
0:
\Nab-c
0: -
*** Failers
0:
\Nabc
No match
/a*(b+)(z)(z)/IP
aaaabbbbzzzz
0: aaaabbbbzz
1: bbbb
2: z
3: z
aaaabbbbzzzz\O0
aaaabbbbzzzz\O1
0: aaaabbbbzz
aaaabbbbzzzz\O2
0: aaaabbbbzz
1: bbbb
aaaabbbbzzzz\O3
0: aaaabbbbzz
1: bbbb
2: z
aaaabbbbzzzz\O4
0: aaaabbbbzz
1: bbbb
2: z
3: z
aaaabbbbzzzz\O5
0: aaaabbbbzz
1: bbbb
2: z
3: z
/^.?abcd/IS
Capturing subpattern count = 0
Options: anchored
No first char
Need char = 'd'
Study returned NULL
/\( # ( at start
(?: # Non-capturing bracket
(?>[^()]+) # Either a sequence of non-brackets (no backtracking)
| # Or
(?R) # Recurse - i.e. nested bracketed string
)* # Zero or more contents
\) # Closing )
/Ix
Capturing subpattern count = 0
Partial matching not supported
Options: extended
First char = '('
Need char = ')'
(abcd)
0: (abcd)
(abcd)xyz
0: (abcd)
xyz(abcd)
0: (abcd)
(ab(xy)cd)pqr
0: (ab(xy)cd)
(ab(xycd)pqr
0: (xycd)
() abc ()
0: ()
12(abcde(fsh)xyz(foo(bar))lmno)89
0: (abcde(fsh)xyz(foo(bar))lmno)
*** Failers
No match
abcd
No match
abcd)
No match
(abcd
No match
/\( ( (?>[^()]+) | (?R) )* \) /Ixg
Capturing subpattern count = 1
Partial matching not supported
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)pqr
0: (ab(xy)cd)
1: cd
1(abcd)(x(y)z)pqr
0: (abcd)
1: abcd
0: (x(y)z)
1: z
/\( (?: (?>[^()]+) | (?R) ) \) /Ix
Capturing subpattern count = 0
Partial matching not supported
Options: extended
First char = '('
Need char = ')'
(abcd)
0: (abcd)
(ab(xy)cd)
0: (xy)
(a(b(c)d)e)
0: (c)
((ab))
0: ((ab))
*** Failers
No match
()
No match
/\( (?: (?>[^()]+) | (?R) )? \) /Ix
Capturing subpattern count = 0
Partial matching not supported
Options: extended
First char = '('
Need char = ')'
()
0: ()
12(abcde(fsh)xyz(foo(bar))lmno)89
0: (fsh)
/\( ( (?>[^()]+) | (?R) )* \) /Ix
Capturing subpattern count = 1
Partial matching not supported
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)
0: (ab(xy)cd)
1: cd
/\( ( ( (?>[^()]+) | (?R) )* ) \) /Ix
Capturing subpattern count = 2
Partial matching not supported
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)
0: (ab(xy)cd)
1: ab(xy)cd
2: cd
/\( (123)? ( ( (?>[^()]+) | (?R) )* ) \) /Ix
Capturing subpattern count = 3
Partial matching not supported
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)
0: (ab(xy)cd)
1: <unset>
2: ab(xy)cd
3: cd
(123ab(xy)cd)
0: (123ab(xy)cd)
1: 123
2: ab(xy)cd
3: cd
/\( ( (123)? ( (?>[^()]+) | (?R) )* ) \) /Ix
Capturing subpattern count = 3
Partial matching not supported
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)
0: (ab(xy)cd)
1: ab(xy)cd
2: <unset>
3: cd
(123ab(xy)cd)
0: (123ab(xy)cd)
1: 123ab(xy)cd
2: 123
3: cd
/\( (((((((((( ( (?>[^()]+) | (?R) )* )))))))))) \) /Ix
Capturing subpattern count = 11
Partial matching not supported
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)
0: (ab(xy)cd)
1: ab(xy)cd
2: ab(xy)cd
3: ab(xy)cd
4: ab(xy)cd
5: ab(xy)cd
6: ab(xy)cd
7: ab(xy)cd
8: ab(xy)cd
9: ab(xy)cd
10: ab(xy)cd
11: cd
/\( ( ( (?>[^()<>]+) | ((?>[^()]+)) | (?R) )* ) \) /Ix
Capturing subpattern count = 3
Partial matching not supported
Options: extended
First char = '('
Need char = ')'
(abcd(xyz<p>qrs)123)
0: (abcd(xyz<p>qrs)123)
1: abcd(xyz<p>qrs)123
2: 123
3: <unset>
/\( ( ( (?>[^()]+) | ((?R)) )* ) \) /Ix
Capturing subpattern count = 3
Partial matching not supported
Options: extended
First char = '('
Need char = ')'
(ab(cd)ef)
0: (ab(cd)ef)
1: ab(cd)ef
2: ef
3: (cd)
(ab(cd(ef)gh)ij)
0: (ab(cd(ef)gh)ij)
1: ab(cd(ef)gh)ij
2: ij
3: (cd(ef)gh)
/^[[:alnum:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [0-9A-Za-z]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:^alnum:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x00-/:-@[-`{-\xff]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:alpha:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [A-Za-z]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:^alpha:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x00-@[-`{-\xff]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/[_[:alpha:]]/IS
Capturing subpattern count = 0
No options
No first char
No need char
Starting byte set: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
_ a b c d e f g h i j k l m n o p q r s t u v w x y z
/^[[:ascii:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x00-\x7f]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:^ascii:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x80-\xff]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:blank:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x09 ]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:^blank:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x00-\x08\x0a-\x1f!-\xff]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/[\n\x0b\x0c\x0d[:blank:]]/IS
Capturing subpattern count = 0
No options
No first char
No need char
Starting byte set: \x09 \x0a \x0b \x0c \x0d \x20
/^[[:cntrl:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x00-\x1f\x7f]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:digit:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [0-9]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:graph:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [!-~]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:lower:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [a-z]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:print:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [ -~]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:punct:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [!-/:-@[-`{-~]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:space:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x09-\x0d ]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:upper:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [A-Z]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:xdigit:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [0-9A-Fa-f]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:word:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [0-9A-Z_a-z]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:^cntrl:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [ -~\x80-\xff]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[12[:^digit:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x00-/12:-\xff]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:^blank:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x00-\x08\x0a-\x1f!-\xff]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/[01[:alpha:]%]/D
------------------------------------------------------------------
0 36 Bra 0
3 [%01A-Za-z]
36 36 Ket
39 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
No first char
No need char
/[[.ch.]]/I
Failed: POSIX collating elements are not supported at offset 1
/[[=ch=]]/I
Failed: POSIX collating elements are not supported at offset 1
/[[:rhubarb:]]/I
Failed: unknown POSIX class name at offset 3
/[[:upper:]]/Ii
Capturing subpattern count = 0
Options: caseless
No first char
No need char
A
0: A
a
0: a
/[[:lower:]]/Ii
Capturing subpattern count = 0
Options: caseless
No first char
No need char
A
0: A
a
0: a
/((?-i)[[:lower:]])[[:lower:]]/Ii
Capturing subpattern count = 1
Options: caseless
No first char
No need char
ab
0: ab
1: a
aB
0: aB
1: a
*** Failers
0: ai
1: a
Ab
No match
AB
No match
/[\200-\110]/I
Failed: range out of order in character class at offset 9
/^(?(0)f|b)oo/I
Failed: invalid condition (?(0) at offset 6
/This one's here because of the large output vector needed/I
Capturing subpattern count = 0
No options
First char = 'T'
Need char = 'd'
/(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\w+)\s+(\270)/I
Capturing subpattern count = 271
Max back reference = 270
Partial matching not supported
No options
No first char
No need char
\O900 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC
0: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC
1: 1
2: 2
3: 3
4: 4
5: 5
6: 6
7: 7
8: 8
9: 9
10: 10
11: 11
12: 12
13: 13
14: 14
15: 15
16: 16
17: 17
18: 18
19: 19
20: 20
21: 21
22: 22
23: 23
24: 24
25: 25
26: 26
27: 27
28: 28
29: 29
30: 30
31: 31
32: 32
33: 33
34: 34
35: 35
36: 36
37: 37
38: 38
39: 39
40: 40
41: 41
42: 42
43: 43
44: 44
45: 45
46: 46
47: 47
48: 48
49: 49
50: 50
51: 51
52: 52
53: 53
54: 54
55: 55
56: 56
57: 57
58: 58
59: 59
60: 60
61: 61
62: 62
63: 63
64: 64
65: 65
66: 66
67: 67
68: 68
69: 69
70: 70
71: 71
72: 72
73: 73
74: 74
75: 75
76: 76
77: 77
78: 78
79: 79
80: 80
81: 81
82: 82
83: 83
84: 84
85: 85
86: 86
87: 87
88: 88
89: 89
90: 90
91: 91
92: 92
93: 93
94: 94
95: 95
96: 96
97: 97
98: 98
99: 99
100: 100
101: 101
102: 102
103: 103
104: 104
105: 105
106: 106
107: 107
108: 108
109: 109
110: 110
111: 111
112: 112
113: 113
114: 114
115: 115
116: 116
117: 117
118: 118
119: 119
120: 120
121: 121
122: 122
123: 123
124: 124
125: 125
126: 126
127: 127
128: 128
129: 129
130: 130
131: 131
132: 132
133: 133
134: 134
135: 135
136: 136
137: 137
138: 138
139: 139
140: 140
141: 141
142: 142
143: 143
144: 144
145: 145
146: 146
147: 147
148: 148
149: 149
150: 150
151: 151
152: 152
153: 153
154: 154
155: 155
156: 156
157: 157
158: 158
159: 159
160: 160
161: 161
162: 162
163: 163
164: 164
165: 165
166: 166
167: 167
168: 168
169: 169
170: 170
171: 171
172: 172
173: 173
174: 174
175: 175
176: 176
177: 177
178: 178
179: 179
180: 180
181: 181
182: 182
183: 183
184: 184
185: 185
186: 186
187: 187
188: 188
189: 189
190: 190
191: 191
192: 192
193: 193
194: 194
195: 195
196: 196
197: 197
198: 198
199: 199
200: 200
201: 201
202: 202
203: 203
204: 204
205: 205
206: 206
207: 207
208: 208
209: 209
210: 210
211: 211
212: 212
213: 213
214: 214
215: 215
216: 216
217: 217
218: 218
219: 219
220: 220
221: 221
222: 222
223: 223
224: 224
225: 225
226: 226
227: 227
228: 228
229: 229
230: 230
231: 231
232: 232
233: 233
234: 234
235: 235
236: 236
237: 237
238: 238
239: 239
240: 240
241: 241
242: 242
243: 243
244: 244
245: 245
246: 246
247: 247
248: 248
249: 249
250: 250
251: 251
252: 252
253: 253
254: 254
255: 255
256: 256
257: 257
258: 258
259: 259
260: 260
261: 261
262: 262
263: 263
264: 264
265: 265
266: 266
267: 267
268: 268
269: 269
270: ABC
271: ABC
/This one's here because Perl does this differently and PCRE can't at present/I
Capturing subpattern count = 0
No options
First char = 'T'
Need char = 't'
/(main(O)?)+/I
Capturing subpattern count = 2
No options
First char = 'm'
Need char = 'n'
mainmain
0: mainmain
1: main
mainOmain
0: mainOmain
1: main
2: O
/These are all cases where Perl does it differently (nested captures)/I
Capturing subpattern count = 1
No options
First char = 'T'
Need char = 's'
/^(a(b)?)+$/I
Capturing subpattern count = 2
Options: anchored
No first char
No need char
aba
0: aba
1: a
2: b
/^(aa(bb)?)+$/I
Capturing subpattern count = 2
Options: anchored
No first char
No need char
aabbaa
0: aabbaa
1: aa
2: bb
/^(aa|aa(bb))+$/I
Capturing subpattern count = 2
Options: anchored
No first char
No need char
aabbaa
0: aabbaa
1: aa
2: bb
/^(aa(bb)??)+$/I
Capturing subpattern count = 2
Options: anchored
No first char
No need char
aabbaa
0: aabbaa
1: aa
2: bb
/^(?:aa(bb)?)+$/I
Capturing subpattern count = 1
Options: anchored
No first char
No need char
aabbaa
0: aabbaa
1: bb
/^(aa(b(b))?)+$/I
Capturing subpattern count = 3
Options: anchored
No first char
No need char
aabbaa
0: aabbaa
1: aa
2: bb
3: b
/^(?:aa(b(b))?)+$/I
Capturing subpattern count = 2
Options: anchored
No first char
No need char
aabbaa
0: aabbaa
1: bb
2: b
/^(?:aa(b(?:b))?)+$/I
Capturing subpattern count = 1
Options: anchored
No first char
No need char
aabbaa
0: aabbaa
1: bb
/^(?:aa(bb(?:b))?)+$/I
Capturing subpattern count = 1
Options: anchored
No first char
No need char
aabbbaa
0: aabbbaa
1: bbb
/^(?:aa(b(?:bb))?)+$/I
Capturing subpattern count = 1
Options: anchored
No first char
No need char
aabbbaa
0: aabbbaa
1: bbb
/^(?:aa(?:b(b))?)+$/I
Capturing subpattern count = 1
Options: anchored
No first char
No need char
aabbaa
0: aabbaa
1: b
/^(?:aa(?:b(bb))?)+$/I
Capturing subpattern count = 1
Options: anchored
No first char
No need char
aabbbaa
0: aabbbaa
1: bb
/^(aa(b(bb))?)+$/I
Capturing subpattern count = 3
Options: anchored
No first char
No need char
aabbbaa
0: aabbbaa
1: aa
2: bbb
3: bb
/^(aa(bb(bb))?)+$/I
Capturing subpattern count = 3
Options: anchored
No first char
No need char
aabbbbaa
0: aabbbbaa
1: aa
2: bbbb
3: bb
/--------------------------------------------------------------------/I
Capturing subpattern count = 0
No options
First char = '-'
Need char = '-'
/#/IxMD
Memory allocation (code space): 7
------------------------------------------------------------------
0 3 Bra 0
3 3 Ket
6 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: extended
No first char
No need char
/a#/IxMD
Memory allocation (code space): 9
------------------------------------------------------------------
0 5 Bra 0
3 a
5 5 Ket
8 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: extended
First char = 'a'
No need char
/[\s]/D
------------------------------------------------------------------
0 36 Bra 0
3 [\x09\x0a\x0c\x0d ]
36 36 Ket
39 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
No first char
No need char
/[\S]/D
------------------------------------------------------------------
0 36 Bra 0
3 [\x00-\x08\x0b\x0e-\x1f!-\xff]
36 36 Ket
39 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
No first char
No need char
/a(?i)b/D
------------------------------------------------------------------
0 9 Bra 0
3 a
5 01 Opt
7 NC b
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b' (caseless)
ab
0: ab
aB
0: aB
*** Failers
No match
AB
No match
/(a(?i)b)/D
------------------------------------------------------------------
0 19 Bra 0
3 11 Bra 1
8 a
10 01 Opt
12 NC b
14 11 Ket
17 00 Opt
19 19 Ket
22 End
------------------------------------------------------------------
Capturing subpattern count = 1
No options
First char = 'a'
Need char = 'b' (caseless)
ab
0: ab
1: ab
aB
0: aB
1: aB
*** Failers
No match
AB
No match
/ (?i)abc/IxD
------------------------------------------------------------------
0 9 Bra 0
3 NC abc
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: caseless extended
First char = 'a' (caseless)
Need char = 'c' (caseless)
/#this is a comment
(?i)abc/IxD
------------------------------------------------------------------
0 9 Bra 0
3 NC abc
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: caseless extended
First char = 'a' (caseless)
Need char = 'c' (caseless)
/123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/D
------------------------------------------------------------------
0 603 Bra 0
3 123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
603 603 Ket
606 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char = '1'
Need char = '0'
/\Q123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/D
------------------------------------------------------------------
0 603 Bra 0
3 123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
603 603 Ket
606 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char = '1'
Need char = '0'
/\Q\E/D
------------------------------------------------------------------
0 3 Bra 0
3 3 Ket
6 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
No first char
No need char
\
0:
/\Q\Ex/D
------------------------------------------------------------------
0 5 Bra 0
3 x
5 5 Ket
8 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char = 'x'
No need char
/ \Q\E/D
------------------------------------------------------------------
0 5 Bra 0
3
5 5 Ket
8 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char = ' '
No need char
/a\Q\E/D
------------------------------------------------------------------
0 5 Bra 0
3 a
5 5 Ket
8 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char = 'a'
No need char
abc
0: a
bca
0: a
bac
0: a
/a\Q\Eb/D
------------------------------------------------------------------
0 7 Bra 0
3 ab
7 7 Ket
10 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
abc
0: ab
/\Q\Eabc/D
------------------------------------------------------------------
0 9 Bra 0
3 abc
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
/x*+\w/D
------------------------------------------------------------------
0 6 Bra 0
3 x*+
5 \w
6 6 Ket
9 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
*** Failers
0: F
xxxxx
No match
/x?+/D
------------------------------------------------------------------
0 5 Bra 0
3 x?+
5 5 Ket
8 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
No first char
No need char
/x++/D
------------------------------------------------------------------
0 5 Bra 0
3 x++
5 5 Ket
8 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'x'
No need char
/x{1,3}+/D
------------------------------------------------------------------
0 15 Bra 0
3 9 Once
6 x
8 x{0,2}
12 9 Ket
15 15 Ket
18 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'x'
No need char
/(x)*+/D
------------------------------------------------------------------
0 20 Bra 0
3 14 Once
6 Brazero
7 7 Bra 1
12 x
14 7 KetRmax
17 14 Ket
20 20 Ket
23 End
------------------------------------------------------------------
Capturing subpattern count = 1
No options
No first char
No need char
/^(\w++|\s++)*$/I
Capturing subpattern count = 1
Partial matching not supported
Options: anchored
No first char
No need char
now is the time for all good men to come to the aid of the party
0: now is the time for all good men to come to the aid of the party
1: party
*** Failers
No match
this is not a line with only words and spaces!
No match
/(\d++)(\w)/I
Capturing subpattern count = 2
Partial matching not supported
No options
No first char
No need char
12345a
0: 12345a
1: 12345
2: a
*** Failers
No match
12345+
No match
/a++b/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
Need char = 'b'
aaab
0: aaab
/(a++b)/I
Capturing subpattern count = 1
Partial matching not supported
No options
First char = 'a'
Need char = 'b'
aaab
0: aaab
1: aaab
/(a++)b/I
Capturing subpattern count = 1
Partial matching not supported
No options
First char = 'a'
Need char = 'b'
aaab
0: aaab
1: aaa
/([^()]++|\([^()]*\))+/I
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
((abc(ade)ufh()()x
0: abc(ade)ufh()()x
1: x
/\(([^()]++|\([^()]+\))+\)/I
Capturing subpattern count = 1
Partial matching not supported
No options
First char = '('
Need char = ')'
(abc)
0: (abc)
1: abc
(abc(def)xyz)
0: (abc(def)xyz)
1: xyz
*** Failers
No match
((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
No match
/(abc){1,3}+/D
------------------------------------------------------------------
0 59 Bra 0
3 53 Once
6 11 Bra 1
11 abc
17 11 Ket
20 Brazero
21 32 Bra 0
24 11 Bra 1
29 abc
35 11 Ket
38 Brazero
39 11 Bra 1
44 abc
50 11 Ket
53 32 Ket
56 53 Ket
59 59 Ket
62 End
------------------------------------------------------------------
Capturing subpattern count = 1
No options
First char = 'a'
Need char = 'c'
/a+?+/I
Failed: nothing to repeat at offset 3
/a{2,3}?+b/I
Failed: nothing to repeat at offset 7
/(?U)a+?+/I
Failed: nothing to repeat at offset 7
/a{2,3}?+b/IU
Failed: nothing to repeat at offset 7
/x(?U)a++b/D
------------------------------------------------------------------
0 9 Bra 0
3 x
5 a++
7 b
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'x'
Need char = 'b'
xaaaab
0: xaaaab
/(?U)xa++b/D
------------------------------------------------------------------
0 9 Bra 0
3 x
5 a++
7 b
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
Options: ungreedy
First char = 'x'
Need char = 'b'
xaaaab
0: xaaaab
/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/D
------------------------------------------------------------------
0 116 Bra 0
3 ^
4 109 Bra 1
9 7 Bra 2
14 a+
16 7 Ket
19 39 Bra 3
24 [ab]+?
58 39 Ket
61 39 Bra 4
66 [bc]+
100 39 Ket
103 7 Bra 5
108 \w*
110 7 Ket
113 109 Ket
116 116 Ket
119 End
------------------------------------------------------------------
Capturing subpattern count = 5
Partial matching not supported
Options: anchored
No first char
No need char
/^x(?U)a+b/D
------------------------------------------------------------------
0 10 Bra 0
3 ^
4 x
6 a++
8 b
10 10 Ket
13 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
Options: anchored
No first char
Need char = 'b'
/^x(?U)(a+)b/D
------------------------------------------------------------------
0 18 Bra 0
3 ^
4 x
6 7 Bra 1
11 a+?
13 7 Ket
16 b
18 18 Ket
21 End
------------------------------------------------------------------
Capturing subpattern count = 1
Partial matching not supported
Options: anchored
No first char
Need char = 'b'
/[.x.]/I
Failed: POSIX collating elements are not supported at offset 0
/[=x=]/I
Failed: POSIX collating elements are not supported at offset 0
/[:x:]/I
Failed: POSIX named classes are supported only within a class at offset 0
/\l/I
Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1
/\L/I
Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1
/\N{name}/I
Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1
/\u/I
Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1
/\U/I
Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1
/[/I
Failed: missing terminating ] for character class at offset 1
/[a-/I
Failed: missing terminating ] for character class at offset 3
/[[:space:]/I
Failed: missing terminating ] for character class at offset 10
/[\s]/IDM
Memory allocation (code space): 40
------------------------------------------------------------------
0 36 Bra 0
3 [\x09\x0a\x0c\x0d ]
36 36 Ket
39 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
No first char
No need char
/[[:space:]]/IDM
Memory allocation (code space): 40
------------------------------------------------------------------
0 36 Bra 0
3 [\x09-\x0d ]
36 36 Ket
39 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
No first char
No need char
/[[:space:]abcde]/IDM
Memory allocation (code space): 40
------------------------------------------------------------------
0 36 Bra 0
3 [\x09-\x0d a-e]
36 36 Ket
39 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
No first char
No need char
/< (?: (?(R) \d++ | [^<>]*+) | (?R)) * >/Ix
Capturing subpattern count = 0
Partial matching not supported
Options: extended
First char = '<'
Need char = '>'
<>
0: <>
<abcd>
0: <abcd>
<abc <123> hij>
0: <abc <123> hij>
<abc <def> hij>
0: <def>
<abc<>def>
0: <abc<>def>
<abc<>
0: <>
*** Failers
No match
<abc
No match
|8J\$WE\<\.rX\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|IDM
Memory allocation (code space): 826
------------------------------------------------------------------
0 822 Bra 0
3 8J$WE<.rX+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
821 \b
822 822 Ket
825 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char = '8'
Need char = 'X'
|\$\<\.X\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|IDM
Memory allocation (code space): 816
------------------------------------------------------------------
0 812 Bra 0
3 $<.X+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
811 \b
812 812 Ket
815 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char = '$'
Need char = 'X'
/(.*)\d+\1/I
Capturing subpattern count = 1
Max back reference = 1
Partial matching not supported
No options
No first char
No need char
/(.*)\d+/I
Capturing subpattern count = 1
Partial matching not supported
No options
First char at start or follows newline
No need char
/(.*)\d+\1/Is
Capturing subpattern count = 1
Max back reference = 1
Partial matching not supported
Options: dotall
No first char
No need char
/(.*)\d+/Is
Capturing subpattern count = 1
Partial matching not supported
Options: anchored dotall
No first char
No need char
/(.*(xyz))\d+\2/I
Capturing subpattern count = 2
Max back reference = 2
Partial matching not supported
No options
First char at start or follows newline
Need char = 'z'
/((.*))\d+\1/I
Capturing subpattern count = 2
Max back reference = 1
Partial matching not supported
No options
No first char
No need char
abc123bc
0: bc123bc
1: bc
2: bc
/a[b]/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/(?=a).*/I
Capturing subpattern count = 0
Partial matching not supported
No options
First char = 'a'
No need char
/(?=abc).xyz/IiI
Capturing subpattern count = 0
Options: caseless
First char = 'a' (caseless)
Need char = 'z' (caseless)
/(?=abc)(?i).xyz/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'z' (caseless)
/(?=a)(?=b)/I
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/(?=.)a/I
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/((?=abcda)a)/I
Capturing subpattern count = 1
No options
First char = 'a'
Need char = 'a'
/((?=abcda)ab)/I
Capturing subpattern count = 1
No options
First char = 'a'
Need char = 'b'
/()a/I
Capturing subpattern count = 1
No options
No first char
Need char = 'a'
/(?(1)ab|ac)/I
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/(?(1)abz|acz)/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'z'
/(?(1)abz)/I
Capturing subpattern count = 0
No options
No first char
No need char
/(?(1)abz)123/I
Capturing subpattern count = 0
No options
No first char
Need char = '3'
/(a)+/I
Capturing subpattern count = 1
No options
First char = 'a'
No need char
/(a){2,3}/I
Capturing subpattern count = 1
No options
First char = 'a'
Need char = 'a'
/(a)*/I
Capturing subpattern count = 1
No options
No first char
No need char
/[a]/I
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/[ab]/I
Capturing subpattern count = 0
No options
No first char
No need char
/[ab]/IS
Capturing subpattern count = 0
No options
No first char
No need char
Starting byte set: a b
/[^a]/I
Capturing subpattern count = 0
No options
No first char
No need char
/\d456/I
Capturing subpattern count = 0
No options
No first char
Need char = '6'
/\d456/IS
Capturing subpattern count = 0
No options
No first char
Need char = '6'
Starting byte set: 0 1 2 3 4 5 6 7 8 9
/a^b/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/^a/Im
Capturing subpattern count = 0
Options: multiline
First char at start or follows newline
Need char = 'a'
abcde
0: a
xy\nabc
0: a
*** Failers
No match
xyabc
No match
/c|abc/I
Capturing subpattern count = 0
No options
No first char
Need char = 'c'
/(?i)[ab]/IS
Capturing subpattern count = 0
Options: caseless
No first char
No need char
Starting byte set: A B a b
/[ab](?i)cd/IS
Capturing subpattern count = 0
No options
No first char
Need char = 'd' (caseless)
Starting byte set: a b
/abc(?C)def/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'f'
abcdef
--->abcdef
0 ^ ^ d
0: abcdef
1234abcdef
--->1234abcdef
0 ^ ^ d
0: abcdef
*** Failers
No match
abcxyz
No match
abcxyzf
--->abcxyzf
0 ^ ^ d
No match
/abc(?C)de(?C1)f/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'f'
123abcdef
--->123abcdef
0 ^ ^ d
1 ^ ^ f
0: abcdef
/(?C1)\dabc(?C2)def/I
Capturing subpattern count = 0
No options
No first char
Need char = 'f'
1234abcdef
--->1234abcdef
1 ^ \d
1 ^ \d
1 ^ \d
1 ^ \d
2 ^ ^ d
0: 4abcdef
*** Failers
No match
abcdef
--->abcdef
1 ^ \d
1 ^ \d
1 ^ \d
1 ^ \d
1 ^ \d
1 ^ \d
No match
/(?C255)ab/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/(?C256)ab/I
Failed: number after (?C is > 255 at offset 6
/(?Cab)xx/I
Failed: closing ) for (?C expected at offset 3
/(?C12vr)x/I
Failed: closing ) for (?C expected at offset 5
/abc(?C)def/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'f'
*** Failers
No match
\x83\x0\x61bcdef
--->\x83\x00abcdef
0 ^ ^ d
0: abcdef
/(abc)(?C)de(?C1)f/I
Capturing subpattern count = 1
No options
First char = 'a'
Need char = 'f'
123abcdef
--->123abcdef
0 ^ ^ d
1 ^ ^ f
0: abcdef
1: abc
123abcdef\C+
Callout 0: last capture = 1
0: <unset>
1: abc
--->123abcdef
^ ^ d
Callout 1: last capture = 1
0: <unset>
1: abc
--->123abcdef
^ ^ f
0: abcdef
1: abc
123abcdef\C-
0: abcdef
1: abc
*** Failers
No match
123abcdef\C!1
--->123abcdef
0 ^ ^ d
1 ^ ^ f
No match
/(?C0)(abc(?C1))*/I
Capturing subpattern count = 1
No options
No first char
No need char
abcabcabc
--->abcabcabc
0 ^ (abc(?C1))*
1 ^ ^ )
1 ^ ^ )
1 ^ ^ )
0: abcabcabc
1: abc
abcabc\C!1!3
--->abcabc
0 ^ (abc(?C1))*
1 ^ ^ )
1 ^ ^ )
0: abcabc
1: abc
*** Failers
--->*** Failers
0 ^ (abc(?C1))*
0:
abcabcabc\C!1!3
--->abcabcabc
0 ^ (abc(?C1))*
1 ^ ^ )
1 ^ ^ )
1 ^ ^ )
0: abcabc
1: abc
/(\d{3}(?C))*/I
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
123\C+
Callout 0: last capture = -1
0: <unset>
--->123
^ ^ )
0: 123
1: 123
123456\C+
Callout 0: last capture = -1
0: <unset>
--->123456
^ ^ )
Callout 0: last capture = 1
0: <unset>
1: 123
--->123456
^ ^ )
0: 123456
1: 456
123456789\C+
Callout 0: last capture = -1
0: <unset>
--->123456789
^ ^ )
Callout 0: last capture = 1
0: <unset>
1: 123
--->123456789
^ ^ )
Callout 0: last capture = 1
0: <unset>
1: 456
--->123456789
^ ^ )
0: 123456789
1: 789
/((xyz)(?C)p|(?C1)xyzabc)/I
Capturing subpattern count = 2
No options
First char = 'x'
No need char
xyzabc\C+
Callout 0: last capture = 2
0: <unset>
1: <unset>
2: xyz
--->xyzabc
^ ^ p
Callout 1: last capture = -1
0: <unset>
--->xyzabc
^ x
0: xyzabc
1: xyzabc
/(X)((xyz)(?C)p|(?C1)xyzabc)/I
Capturing subpattern count = 3
No options
First char = 'X'
Need char = 'x'
Xxyzabc\C+
Callout 0: last capture = 3
0: <unset>
1: X
2: <unset>
3: xyz
--->Xxyzabc
^ ^ p
Callout 1: last capture = 1
0: <unset>
1: X
--->Xxyzabc
^^ x
0: Xxyzabc
1: X
2: xyzabc
/(?=(abc))(?C)abcdef/I
Capturing subpattern count = 1
No options
First char = 'a'
Need char = 'f'
abcdef\C+
Callout 0: last capture = 1
0: <unset>
1: abc
--->abcdef
^ a
0: abcdef
1: abc
/(?!(abc)(?C1)d)(?C2)abcxyz/I
Capturing subpattern count = 1
No options
First char = 'a'
Need char = 'z'
abcxyz\C+
Callout 1: last capture = 1
0: <unset>
1: abc
--->abcxyz
^ ^ d
Callout 2: last capture = -1
0: <unset>
--->abcxyz
^ a
0: abcxyz
/(?<=(abc)(?C))xyz/I
Capturing subpattern count = 1
No options
First char = 'x'
Need char = 'z'
abcxyz\C+
Callout 0: last capture = 1
0: <unset>
1: abc
--->abcxyz
^ )
0: xyz
1: abc
/a(b+)(c*)(?C1)/I
Capturing subpattern count = 2
Partial matching not supported
No options
First char = 'a'
Need char = 'b'
abbbbbccc\C*1
--->abbbbbccc
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
No match
/a(b+?)(c*?)(?C1)/I
Capturing subpattern count = 2
Partial matching not supported
No options
First char = 'a'
Need char = 'b'
abbbbbccc\C*1
--->abbbbbccc
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
No match
/(?C)abc/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
/(?C)^abc/I
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/(?C)a|b/IS
Capturing subpattern count = 0
No options
No first char
No need char
Starting byte set: a b
/(?R)/I
Failed: recursive call could loop indefinitely at offset 3
/(a|(?R))/I
Failed: recursive call could loop indefinitely at offset 6
/(ab|(bc|(de|(?R))))/I
Failed: recursive call could loop indefinitely at offset 15
/x(ab|(bc|(de|(?R))))/I
Capturing subpattern count = 3
No options
First char = 'x'
No need char
xab
0: xab
1: ab
xbc
0: xbc
1: bc
2: bc
xde
0: xde
1: de
2: de
3: de
xxab
0: xxab
1: xab
2: xab
3: xab
xxxab
0: xxxab
1: xxab
2: xxab
3: xxab
*** Failers
No match
xyab
No match
/(ab|(bc|(de|(?1))))/I
Failed: recursive call could loop indefinitely at offset 15
/x(ab|(bc|(de|(?1)x)x)x)/I
Failed: recursive call could loop indefinitely at offset 16
/^([^()]|\((?1)*\))*$/I
Capturing subpattern count = 1
Options: anchored
No first char
No need char
abc
0: abc
1: c
a(b)c
0: a(b)c
1: c
a(b(c))d
0: a(b(c))d
1: d
*** Failers)
No match
a(b(c)d
No match
/^>abc>([^()]|\((?1)*\))*<xyz<$/I
Capturing subpattern count = 1
Options: anchored
No first char
Need char = '<'
>abc>123<xyz<
0: >abc>123<xyz<
1: 3
>abc>1(2)3<xyz<
0: >abc>1(2)3<xyz<
1: 3
>abc>(1(2)3)<xyz<
0: >abc>(1(2)3)<xyz<
1: (1(2)3)
/(a(?1)b)/D
------------------------------------------------------------------
0 24 Bra 0
3 18 Bra 1
8 a
10 6 Once
13 3 Recurse
16 6 Ket
19 b
21 18 Ket
24 24 Ket
27 End
------------------------------------------------------------------
Capturing subpattern count = 1
No options
First char = 'a'
Need char = 'b'
/(a(?1)+b)/D
------------------------------------------------------------------
0 24 Bra 0
3 18 Bra 1
8 a
10 6 Once
13 3 Recurse
16 6 KetRmax
19 b
21 18 Ket
24 24 Ket
27 End
------------------------------------------------------------------
Capturing subpattern count = 1
No options
First char = 'a'
Need char = 'b'
/^\W*(?:((.)\W*(?1)\W*\2|)|((.)\W*(?3)\W*\4|\W*.\W*))\W*$/Ii
Capturing subpattern count = 4
Max back reference = 4
Partial matching not supported
Options: anchored caseless
No first char
No need char
1221
0: 1221
1: 1221
2: 1
Satan, oscillate my metallic sonatas!
0: Satan, oscillate my metallic sonatas!
1: <unset>
2: <unset>
3: Satan, oscillate my metallic sonatas
4: S
A man, a plan, a canal: Panama!
0: A man, a plan, a canal: Panama!
1: <unset>
2: <unset>
3: A man, a plan, a canal: Panama
4: A
Able was I ere I saw Elba.
0: Able was I ere I saw Elba.
1: <unset>
2: <unset>
3: Able was I ere I saw Elba
4: A
*** Failers
No match
The quick brown fox
No match
/^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/I
Capturing subpattern count = 2
Partial matching not supported
Options: anchored
No first char
No need char
12
0: 12
1: 12
(((2+2)*-3)-7)
0: (((2+2)*-3)-7)
1: (((2+2)*-3)-7)
2: -
-12
0: -12
1: -12
*** Failers
No match
((2+2)*-3)-7)
No match
/^(x(y|(?1){2})z)/I
Capturing subpattern count = 2
Options: anchored
No first char
No need char
xyz
0: xyz
1: xyz
2: y
xxyzxyzz
0: xxyzxyzz
1: xxyzxyzz
2: xyzxyz
*** Failers
No match
xxyzz
No match
xxyzxyzxyzz
No match
/((< (?: (?(R) \d++ | [^<>]*+) | (?2)) * >))/Ix
Capturing subpattern count = 2
Partial matching not supported
Options: extended
First char = '<'
Need char = '>'
<>
0: <>
1: <>
2: <>
<abcd>
0: <abcd>
1: <abcd>
2: <abcd>
<abc <123> hij>
0: <abc <123> hij>
1: <abc <123> hij>
2: <abc <123> hij>
<abc <def> hij>
0: <def>
1: <def>
2: <def>
<abc<>def>
0: <abc<>def>
1: <abc<>def>
2: <abc<>def>
<abc<>
0: <>
1: <>
2: <>
*** Failers
No match
<abc
No match
/(?1)/I
Failed: reference to non-existent subpattern at offset 3
/((?2)(abc)/I
Failed: missing ) at offset 10
/^(abc)def(?1)/I
Capturing subpattern count = 1
Options: anchored
No first char
No need char
abcdefabc
0: abcdefabc
1: abc
/^(a|b|c)=(?1)+/I
Capturing subpattern count = 1
Options: anchored
No first char
No need char
a=a
0: a=a
1: a
a=b
0: a=b
1: a
a=bc
0: a=bc
1: a
/^(a|b|c)=((?1))+/I
Capturing subpattern count = 2
Options: anchored
No first char
No need char
a=a
0: a=a
1: a
2: a
a=b
0: a=b
1: a
2: b
a=bc
0: a=bc
1: a
2: c
/a(?P<name1>b|c)d(?P<longername2>e)/D
------------------------------------------------------------------
0 32 Bra 0
3 a
5 7 Bra 1
10 b
12 5 Alt
15 c
17 12 Ket
20 d
22 7 Bra 2
27 e
29 7 Ket
32 32 Ket
35 End
------------------------------------------------------------------
Capturing subpattern count = 2
Named capturing subpatterns:
longername2 2
name1 1
No options
First char = 'a'
Need char = 'e'
abde
0: abde
1: b
2: e
acde
0: acde
1: c
2: e
/(?:a(?P<c>c(?P<d>d)))(?P<a>a)/D
------------------------------------------------------------------
0 41 Bra 0
3 25 Bra 0
6 a
8 17 Bra 1
13 c
15 7 Bra 2
20 d
22 7 Ket
25 17 Ket
28 25 Ket
31 7 Bra 3
36 a
38 7 Ket
41 41 Ket
44 End
------------------------------------------------------------------
Capturing subpattern count = 3
Named capturing subpatterns:
a 3
c 1
d 2
No options
First char = 'a'
Need char = 'a'
/(?P<a>a)...(?P=a)bbb(?P>a)d/D
------------------------------------------------------------------
0 36 Bra 0
3 7 Bra 1
8 a
10 7 Ket
13 Any
14 Any
15 Any
16 \1
19 bbb
25 6 Once
28 3 Recurse
31 6 Ket
34 d
36 36 Ket
39 End
------------------------------------------------------------------
Capturing subpattern count = 1
Max back reference = 1
Named capturing subpatterns:
a 1
No options
First char = 'a'
Need char = 'd'
/^\W*(?:(?P<one>(?P<two>.)\W*(?P>one)\W*(?P=two)|)|(?P<three>(?P<four>.)\W*(?P>three)\W*(?P=four)|\W*.\W*))\W*$/Ii
Capturing subpattern count = 4
Max back reference = 4
Named capturing subpatterns:
four 4
one 1
three 3
two 2
Partial matching not supported
Options: anchored caseless
No first char
No need char
1221
0: 1221
1: 1221
2: 1
Satan, oscillate my metallic sonatas!
0: Satan, oscillate my metallic sonatas!
1: <unset>
2: <unset>
3: Satan, oscillate my metallic sonatas
4: S
A man, a plan, a canal: Panama!
0: A man, a plan, a canal: Panama!
1: <unset>
2: <unset>
3: A man, a plan, a canal: Panama
4: A
Able was I ere I saw Elba.
0: Able was I ere I saw Elba.
1: <unset>
2: <unset>
3: Able was I ere I saw Elba
4: A
*** Failers
No match
The quick brown fox
No match
/((?(R)a|b))\1(?1)?/I
Capturing subpattern count = 1
Max back reference = 1
No options
No first char
No need char
bb
0: bb
1: b
bbaa
0: bba
1: b
/(.*)a/Is
Capturing subpattern count = 1
Partial matching not supported
Options: anchored dotall
No first char
Need char = 'a'
/(.*)a\1/Is
Capturing subpattern count = 1
Max back reference = 1
Partial matching not supported
Options: dotall
No first char
Need char = 'a'
/(.*)a(b)\2/Is
Capturing subpattern count = 2
Max back reference = 2
Partial matching not supported
Options: anchored dotall
No first char
Need char = 'b'
/((.*)a|(.*)b)z/Is
Capturing subpattern count = 3
Partial matching not supported
Options: anchored dotall
No first char
Need char = 'z'
/((.*)a|(.*)b)z\1/Is
Capturing subpattern count = 3
Max back reference = 1
Partial matching not supported
Options: dotall
No first char
Need char = 'z'
/((.*)a|(.*)b)z\2/Is
Capturing subpattern count = 3
Max back reference = 2
Partial matching not supported
Options: dotall
No first char
Need char = 'z'
/((.*)a|(.*)b)z\3/Is
Capturing subpattern count = 3
Max back reference = 3
Partial matching not supported
Options: dotall
No first char
Need char = 'z'
/((.*)a|^(.*)b)z\3/Is
Capturing subpattern count = 3
Max back reference = 3
Partial matching not supported
Options: anchored dotall
No first char
Need char = 'z'
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a/Is
Capturing subpattern count = 31
Partial matching not supported
Options: anchored dotall
No first char
No need char
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\31/Is
Capturing subpattern count = 31
Max back reference = 31
Partial matching not supported
Options: dotall
No first char
No need char
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\32/Is
Capturing subpattern count = 32
Max back reference = 32
Partial matching not supported
Options: dotall
No first char
No need char
/(a)(bc)/IND
------------------------------------------------------------------
0 21 Bra 0
3 5 Bra 0
6 a
8 5 Ket
11 7 Bra 0
14 bc
18 7 Ket
21 21 Ket
24 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: no_auto_capture
First char = 'a'
Need char = 'c'
abc
0: abc
/(?P<one>a)(bc)/IND
------------------------------------------------------------------
0 23 Bra 0
3 7 Bra 1
8 a
10 7 Ket
13 7 Bra 0
16 bc
20 7 Ket
23 23 Ket
26 End
------------------------------------------------------------------
Capturing subpattern count = 1
Named capturing subpatterns:
one 1
Options: no_auto_capture
First char = 'a'
Need char = 'c'
abc
0: abc
1: a
/(a)(?P<named>bc)/IND
------------------------------------------------------------------
0 23 Bra 0
3 5 Bra 0
6 a
8 5 Ket
11 9 Bra 1
16 bc
20 9 Ket
23 23 Ket
26 End
------------------------------------------------------------------
Capturing subpattern count = 1
Named capturing subpatterns:
named 1
Options: no_auto_capture
First char = 'a'
Need char = 'c'
/(a+)*zz/I
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
Need char = 'z'
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaazzbbbbbb\M
Minimum match() limit = 8
Minimum match() recursion limit = 6
0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaazz
1: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaz\M
Minimum match() limit = 32768
Minimum match() recursion limit = 42
No match
/(aaa(?C1)bbb|ab)/I
Capturing subpattern count = 1
No options
First char = 'a'
Need char = 'b'
aaabbb
--->aaabbb
1 ^ ^ b
0: aaabbb
1: aaabbb
aaabbb\C*0
--->aaabbb
1 ^ ^ b
0: aaabbb
1: aaabbb
aaabbb\C*1
--->aaabbb
1 ^ ^ b
Callout data = 1
0: ab
1: ab
aaabbb\C*-1
--->aaabbb
1 ^ ^ b
Callout data = -1
No match
/ab(?P<one>cd)ef(?P<two>gh)/I
Capturing subpattern count = 2
Named capturing subpatterns:
one 1
two 2
No options
First char = 'a'
Need char = 'h'
abcdefgh
0: abcdefgh
1: cd
2: gh
abcdefgh\C1\Gtwo
0: abcdefgh
1: cd
2: gh
1C cd (2)
G gh (2) two
abcdefgh\Cone\Ctwo
0: abcdefgh
1: cd
2: gh
C cd (2) one
C gh (2) two
abcdefgh\Cthree
no parentheses with name "three"
0: abcdefgh
1: cd
2: gh
copy substring three failed -7
/(?P<Tes>)(?P<Test>)/D
------------------------------------------------------------------
0 19 Bra 0
3 5 Bra 1
8 5 Ket
11 5 Bra 2
16 5 Ket
19 19 Ket
22 End
------------------------------------------------------------------
Capturing subpattern count = 2
Named capturing subpatterns:
Tes 1
Test 2
No options
No first char
No need char
/(?P<Test>)(?P<Tes>)/D
------------------------------------------------------------------
0 19 Bra 0
3 5 Bra 1
8 5 Ket
11 5 Bra 2
16 5 Ket
19 19 Ket
22 End
------------------------------------------------------------------
Capturing subpattern count = 2
Named capturing subpatterns:
Tes 2
Test 1
No options
No first char
No need char
/(?P<Z>zz)(?P<A>aa)/I
Capturing subpattern count = 2
Named capturing subpatterns:
A 2
Z 1
No options
First char = 'z'
Need char = 'a'
zzaa\CZ
0: zzaa
1: zz
2: aa
C zz (2) Z
zzaa\CA
0: zzaa
1: zz
2: aa
C aa (2) A
/(?P<x>eks)(?P<x>eccs)/I
Failed: two named subpatterns have the same name at offset 15
/(?P<abc>abc(?P<def>def)(?P<abc>xyz))/I
Failed: two named subpatterns have the same name at offset 30
"\[((?P<elem>\d+)(,(?P>elem))*)\]"I
Capturing subpattern count = 3
Named capturing subpatterns:
elem 2
Partial matching not supported
No options
First char = '['
Need char = ']'
[10,20,30,5,5,4,4,2,43,23,4234]
0: [10,20,30,5,5,4,4,2,43,23,4234]
1: 10,20,30,5,5,4,4,2,43,23,4234
2: 10
3: ,4234
*** Failers
No match
[]
No match
"\[((?P<elem>\d+)(,(?P>elem))*)?\]"I
Capturing subpattern count = 3
Named capturing subpatterns:
elem 2
Partial matching not supported
No options
First char = '['
Need char = ']'
[10,20,30,5,5,4,4,2,43,23,4234]
0: [10,20,30,5,5,4,4,2,43,23,4234]
1: 10,20,30,5,5,4,4,2,43,23,4234
2: 10
3: ,4234
[]
0: []
/(a(b(?2)c))?/D
------------------------------------------------------------------
0 35 Bra 0
3 Brazero
4 28 Bra 1
9 a
11 18 Bra 2
16 b
18 6 Once
21 11 Recurse
24 6 Ket
27 c
29 18 Ket
32 28 Ket
35 35 Ket
38 End
------------------------------------------------------------------
Capturing subpattern count = 2
No options
No first char
No need char
/(a(b(?2)c))*/D
------------------------------------------------------------------
0 35 Bra 0
3 Brazero
4 28 Bra 1
9 a
11 18 Bra 2
16 b
18 6 Once
21 11 Recurse
24 6 Ket
27 c
29 18 Ket
32 28 KetRmax
35 35 Ket
38 End
------------------------------------------------------------------
Capturing subpattern count = 2
No options
No first char
No need char
/(a(b(?2)c)){0,2}/D
------------------------------------------------------------------
0 73 Bra 0
3 Brazero
4 66 Bra 0
7 28 Bra 1
12 a
14 18 Bra 2
19 b
21 6 Once
24 14 Recurse
27 6 Ket
30 c
32 18 Ket
35 28 Ket
38 Brazero
39 28 Bra 1
44 a
46 18 Bra 2
51 b
53 6 Once
56 14 Recurse
59 6 Ket
62 c
64 18 Ket
67 28 Ket
70 66 Ket
73 73 Ket
76 End
------------------------------------------------------------------
Capturing subpattern count = 2
No options
No first char
No need char
/[ab]{1}+/D
------------------------------------------------------------------
0 47 Bra 0
3 41 Once
6 [ab]{1,1}
44 41 Ket
47 47 Ket
50 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
No first char
No need char
/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/Ii
Capturing subpattern count = 3
Partial matching not supported
Options: caseless
No first char
Need char = 'g' (caseless)
Baby Bjorn Active Carrier - With free SHIPPING!!
0: Baby Bjorn Active Carrier - With free SHIPPING!!
1: Baby Bjorn Active Carrier - With free SHIPPING!!
/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/IiS
Capturing subpattern count = 3
Partial matching not supported
Options: caseless
No first char
Need char = 'g' (caseless)
Study returned NULL
Baby Bjorn Active Carrier - With free SHIPPING!!
0: Baby Bjorn Active Carrier - With free SHIPPING!!
1: Baby Bjorn Active Carrier - With free SHIPPING!!
/a*.*b/ISD
------------------------------------------------------------------
0 9 Bra 0
3 a*
5 Any*
7 b
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
Need char = 'b'
Study returned NULL
/(a|b)*.?c/ISD
------------------------------------------------------------------
0 23 Bra 0
3 Brazero
4 7 Bra 1
9 a
11 5 Alt
14 b
16 12 KetRmax
19 Any?
21 c
23 23 Ket
26 End
------------------------------------------------------------------
Capturing subpattern count = 1
No options
No first char
Need char = 'c'
Study returned NULL
/abc(?C255)de(?C)f/D
------------------------------------------------------------------
0 27 Bra 0
3 abc
9 Callout 255 10 1
15 de
19 Callout 0 16 1
25 f
27 27 Ket
30 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'f'
/abcde/ICD
------------------------------------------------------------------
0 49 Bra 0
3 Callout 255 0 1
9 a
11 Callout 255 1 1
17 b
19 Callout 255 2 1
25 c
27 Callout 255 3 1
33 d
35 Callout 255 4 1
41 e
43 Callout 255 5 0
49 49 Ket
52 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options:
First char = 'a'
Need char = 'e'
abcde
--->abcde
+0 ^ a
+1 ^^ b
+2 ^ ^ c
+3 ^ ^ d
+4 ^ ^ e
+5 ^ ^
0: abcde
abcdfe
--->abcdfe
+0 ^ a
+1 ^^ b
+2 ^ ^ c
+3 ^ ^ d
+4 ^ ^ e
No match
/a*b/ICD
------------------------------------------------------------------
0 25 Bra 0
3 Callout 255 0 2
9 a*+
11 Callout 255 2 1
17 b
19 Callout 255 3 0
25 25 Ket
28 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
Options:
No first char
Need char = 'b'
ab
--->ab
+0 ^ a*
+2 ^^ b
+3 ^ ^
0: ab
aaaab
--->aaaab
+0 ^ a*
+2 ^ ^ b
+3 ^ ^
0: aaaab
aaaacb
--->aaaacb
+0 ^ a*
+2 ^ ^ b
+0 ^ a*
+2 ^ ^ b
+0 ^ a*
+2 ^ ^ b
+0 ^ a*
+2 ^^ b
+0 ^ a*
+2 ^ b
+0 ^ a*
+2 ^ b
+3 ^^
0: b
/a+b/ICD
------------------------------------------------------------------
0 25 Bra 0
3 Callout 255 0 2
9 a++
11 Callout 255 2 1
17 b
19 Callout 255 3 0
25 25 Ket
28 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
Options:
First char = 'a'
Need char = 'b'
ab
--->ab
+0 ^ a+
+2 ^^ b
+3 ^ ^
0: ab
aaaab
--->aaaab
+0 ^ a+
+2 ^ ^ b
+3 ^ ^
0: aaaab
aaaacb
--->aaaacb
+0 ^ a+
+2 ^ ^ b
+0 ^ a+
+2 ^ ^ b
+0 ^ a+
+2 ^ ^ b
+0 ^ a+
+2 ^^ b
No match
/(abc|def)x/ICD
------------------------------------------------------------------
0 94 Bra 0
3 Callout 255 0 9
9 35 Bra 1
14 Callout 255 1 1
20 a
22 Callout 255 2 1
28 b
30 Callout 255 3 1
36 c
38 Callout 255 4 0
44 33 Alt
47 Callout 255 5 1
53 d
55 Callout 255 6 1
61 e
63 Callout 255 7 1
69 f
71 Callout 255 8 0
77 68 Ket
80 Callout 255 9 1
86 x
88 Callout 255 10 0
94 94 Ket
97 End
------------------------------------------------------------------
Capturing subpattern count = 1
Options:
No first char
Need char = 'x'
abcx
--->abcx
+0 ^ (abc|def)
+1 ^ a
+2 ^^ b
+3 ^ ^ c
+4 ^ ^ |
+9 ^ ^ x
+10 ^ ^
0: abcx
1: abc
defx
--->defx
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
+6 ^^ e
+7 ^ ^ f
+8 ^ ^ )
+9 ^ ^ x
+10 ^ ^
0: defx
1: def
abcdefzx
--->abcdefzx
+0 ^ (abc|def)
+1 ^ a
+2 ^^ b
+3 ^ ^ c
+4 ^ ^ |
+9 ^ ^ x
+5 ^ d
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
+6 ^^ e
+7 ^ ^ f
+8 ^ ^ )
+9 ^ ^ x
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
No match
/(ab|cd){3,4}/IC
Capturing subpattern count = 1
Options:
No first char
No need char
ababab
--->ababab
+0 ^ (ab|cd){3,4}
+1 ^ a
+2 ^^ b
+3 ^ ^ |
+1 ^ ^ a
+2 ^ ^ b
+3 ^ ^ |
+1 ^ ^ a
+2 ^ ^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+12 ^ ^
0: ababab
1: ab
abcdabcd
--->abcdabcd
+0 ^ (ab|cd){3,4}
+1 ^ a
+2 ^^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ )
+1 ^ ^ a
+2 ^ ^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ )
+12 ^ ^
0: abcdabcd
1: cd
abcdcdcdcdcd
--->abcdcdcdcdcd
+0 ^ (ab|cd){3,4}
+1 ^ a
+2 ^^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ )
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ )
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ )
+12 ^ ^
0: abcdcdcd
1: cd
/([ab]{,4}c|xy)/ICD
------------------------------------------------------------------
0 133 Bra 0
3 Callout 255 0 14
9 90 Bra 1
14 Callout 255 1 4
20 [ab]
53 Callout 255 5 1
59 {
61 Callout 255 6 1
67 ,
69 Callout 255 7 1
75 4
77 Callout 255 8 1
83 }
85 Callout 255 9 1
91 c
93 Callout 255 10 0
99 25 Alt
102 Callout 255 11 1
108 x
110 Callout 255 12 1
116 y
118 Callout 255 13 0
124 115 Ket
127 Callout 255 14 0
133 133 Ket
136 End
------------------------------------------------------------------
Capturing subpattern count = 1
Options:
No first char
No need char
Note: that { does NOT introduce a quantifier
--->Note: that { does NOT introduce a quantifier
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+5 ^^ {
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+5 ^^ {
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+5 ^^ {
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+11 ^ x
No match
/([ab]{1,4}c|xy){4,5}?123/ICD
------------------------------------------------------------------
0 495 Bra 0
3 Callout 255 0 21
9 63 Bra 1
14 Callout 255 1 9
20 [ab]{1,4}
58 Callout 255 10 1
64 c
66 Callout 255 11 0
72 25 Alt
75 Callout 255 12 1
81 x
83 Callout 255 13 1
89 y
91 Callout 255 14 0
97 88 Ket
100 63 Bra 1
105 Callout 255 1 9
111 [ab]{1,4}
149 Callout 255 10 1
155 c
157 Callout 255 11 0
163 25 Alt
166 Callout 255 12 1
172 x
174 Callout 255 13 1
180 y
182 Callout 255 14 0
188 88 Ket
191 63 Bra 1
196 Callout 255 1 9
202 [ab]{1,4}
240 Callout 255 10 1
246 c
248 Callout 255 11 0
254 25 Alt
257 Callout 255 12 1
263 x
265 Callout 255 13 1
271 y
273 Callout 255 14 0
279 88 Ket
282 63 Bra 1
287 Callout 255 1 9
293 [ab]{1,4}
331 Callout 255 10 1
337 c
339 Callout 255 11 0
345 25 Alt
348 Callout 255 12 1
354 x
356 Callout 255 13 1
362 y
364 Callout 255 14 0
370 88 Ket
373 Braminzero
374 63 Bra 1
379 Callout 255 1 9
385 [ab]{1,4}
423 Callout 255 10 1
429 c
431 Callout 255 11 0
437 25 Alt
440 Callout 255 12 1
446 x
448 Callout 255 13 1
454 y
456 Callout 255 14 0
462 88 Ket
465 Callout 255 21 1
471 1
473 Callout 255 22 1
479 2
481 Callout 255 23 1
487 3
489 Callout 255 24 0
495 495 Ket
498 End
------------------------------------------------------------------
Capturing subpattern count = 1
Partial matching not supported
Options:
No first char
Need char = '3'
aacaacaacaacaac123
--->aacaacaacaacaac123
+0 ^ ([ab]{1,4}c|xy){4,5}?
+1 ^ [ab]{1,4}
+10 ^ ^ c
+11 ^ ^ |
+1 ^ ^ [ab]{1,4}
+10 ^ ^ c
+11 ^ ^ |
+1 ^ ^ [ab]{1,4}
+10 ^ ^ c
+11 ^ ^ |
+1 ^ ^ [ab]{1,4}
+10 ^ ^ c
+11 ^ ^ |
+21 ^ ^ 1
+1 ^ ^ [ab]{1,4}
+10 ^ ^ c
+11 ^ ^ |
+21 ^ ^ 1
+22 ^ ^ 2
+23 ^ ^ 3
+24 ^ ^
0: aacaacaacaacaac123
1: aac
/\b.*/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
ab cd\>1
0: cd
/\b.*/Is
Capturing subpattern count = 0
Partial matching not supported
Options: dotall
No first char
No need char
ab cd\>1
0: cd
/(?!.bcd).*/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
Xbcd12345
0: bcd12345
/abcde/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'e'
ab\P
Partial match
abc\P
Partial match
abcd\P
Partial match
abcde\P
0: abcde
the quick brown abc\P
Partial match
** Failers\P
No match
the quick brown abxyz fox\P
No match
"^(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[012])/(20)?\d\d$"I
Capturing subpattern count = 3
Options: anchored
No first char
Need char = '/'
13/05/04\P
0: 13/05/04
1: 13
2: 05
13/5/2004\P
0: 13/5/2004
1: 13
2: 5
3: 20
02/05/09\P
0: 02/05/09
1: 02
2: 05
1\P
Partial match
1/2\P
Partial match
1/2/0\P
Partial match
1/2/04\P
0: 1/2/04
1: 1
2: 2
0\P
Partial match
02/\P
Partial match
02/0\P
Partial match
02/1\P
Partial match
** Failers\P
No match
\P
No match
123\P
No match
33/4/04\P
No match
3/13/04\P
No match
0/1/2003\P
No match
0/\P
No match
02/0/\P
No match
02/13\P
No match
/0{0,2}ABC/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
Need char = 'C'
/\d{3,}ABC/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
Need char = 'C'
/\d*ABC/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
Need char = 'C'
/[abc]+DE/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
Need char = 'E'
/[abc]?123/I
Capturing subpattern count = 0
No options
No first char
Need char = '3'
123\P
0: 123
a\P
Partial match
b\P
Partial match
c\P
Partial match
c12\P
Partial match
c123\P
0: c123
/^(?:\d){3,5}X/I
Capturing subpattern count = 0
Options: anchored
No first char
Need char = 'X'
1\P
Partial match
123\P
Partial match
123X
0: 123X
1234\P
Partial match
1234X
0: 1234X
12345\P
Partial match
12345X
0: 12345X
*** Failers
No match
1X
No match
123456\P
No match
/abc/I>testsavedregex
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
Compiled regex written to testsavedregex
<testsavedregex
Compiled regex loaded from testsavedregex
No study data
abc
0: abc
** Failers
No match
bca
No match
/abc/IF>testsavedregex
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
Compiled regex written to testsavedregex
<testsavedregex
Compiled regex (byte-inverted) loaded from testsavedregex
No study data
abc
0: abc
** Failers
No match
bca
No match
/(a|b)/IS>testsavedregex
Capturing subpattern count = 1
No options
No first char
No need char
Starting byte set: a b
Compiled regex written to testsavedregex
Study data written to testsavedregex
<testsavedregex
Compiled regex loaded from testsavedregex
Study data loaded from testsavedregex
abc
0: a
1: a
** Failers
0: a
1: a
def
No match
/(a|b)/ISF>testsavedregex
Capturing subpattern count = 1
No options
No first char
No need char
Starting byte set: a b
Compiled regex written to testsavedregex
Study data written to testsavedregex
<testsavedregex
Compiled regex (byte-inverted) loaded from testsavedregex
Study data loaded from testsavedregex
abc
0: a
1: a
** Failers
0: a
1: a
def
No match
~<(\w+)/?>(.)*</(\1)>~smgI
Capturing subpattern count = 3
Max back reference = 1
Partial matching not supported
Options: multiline dotall
First char = '<'
Need char = '>'
<!DOCTYPE seite SYSTEM "http://www.lco.lineas.de/xmlCms.dtd">\n<seite>\n<dokumenteninformation>\n<seitentitel>Partner der LCO</seitentitel>\n<sprache>de</sprache>\n<seitenbeschreibung>Partner der LINEAS Consulting\nGmbH</seitenbeschreibung>\n<schluesselworte>LINEAS Consulting GmbH Hamburg\nPartnerfirmen</schluesselworte>\n<revisit>30 days</revisit>\n<robots>index,follow</robots>\n<menueinformation>\n<aktiv>ja</aktiv>\n<menueposition>3</menueposition>\n<menuetext>Partner</menuetext>\n</menueinformation>\n<lastedited>\n<autor>LCO</autor>\n<firma>LINEAS Consulting</firma>\n<datum>15.10.2003</datum>\n</lastedited>\n</dokumenteninformation>\n<inhalt>\n\n<absatzueberschrift>Die Partnerfirmen der LINEAS Consulting\nGmbH</absatzueberschrift>\n\n<absatz><link ziel="http://www.ca.com/" zielfenster="_blank">\n<bild name="logo_ca.gif" rahmen="no"/></link> <link\nziel="http://www.ey.com/" zielfenster="_blank"><bild\nname="logo_euy.gif" rahmen="no"/></link>\n</absatz>\n\n<absatz><link ziel="http://www.cisco.de/" zielfenster="_blank">\n<bild name="logo_cisco.gif" rahmen="ja"/></link></absatz>\n\n<absatz><link ziel="http://www.atelion.de/"\nzielfenster="_blank"><bild\nname="logo_atelion.gif" rahmen="no"/></link>\n</absatz>\n\n<absatz><link ziel="http://www.line-information.de/"\nzielfenster="_blank">\n<bild name="logo_line_information.gif" rahmen="no"/></link>\n</absatz>\n\n<absatz><bild name="logo_aw.gif" rahmen="no"/></absatz>\n\n<absatz><link ziel="http://www.incognis.de/"\nzielfenster="_blank"><bild\nname="logo_incognis.gif" rahmen="no"/></link></absatz>\n\n<absatz><link ziel="http://www.addcraft.com/"\nzielfenster="_blank"><bild\nname="logo_addcraft.gif" rahmen="no"/></link></absatz>\n\n<absatz><link ziel="http://www.comendo.com/"\nzielfenster="_blank"><bild\nname="logo_comendo.gif" rahmen="no"/></link></absatz>\n\n</inhalt>\n</seite>
0: <seite>\x0a<dokumenteninformation>\x0a<seitentitel>Partner der LCO</seitentitel>\x0a<sprache>de</sprache>\x0a<seitenbeschreibung>Partner der LINEAS Consulting\x0aGmbH</seitenbeschreibung>\x0a<schluesselworte>LINEAS Consulting GmbH Hamburg\x0aPartnerfirmen</schluesselworte>\x0a<revisit>30 days</revisit>\x0a<robots>index,follow</robots>\x0a<menueinformation>\x0a<aktiv>ja</aktiv>\x0a<menueposition>3</menueposition>\x0a<menuetext>Partner</menuetext>\x0a</menueinformation>\x0a<lastedited>\x0a<autor>LCO</autor>\x0a<firma>LINEAS Consulting</firma>\x0a<datum>15.10.2003</datum>\x0a</lastedited>\x0a</dokumenteninformation>\x0a<inhalt>\x0a\x0a<absatzueberschrift>Die Partnerfirmen der LINEAS Consulting\x0aGmbH</absatzueberschrift>\x0a\x0a<absatz><link ziel="http://www.ca.com/" zielfenster="_blank">\x0a<bild name="logo_ca.gif" rahmen="no"/></link> <link\x0aziel="http://www.ey.com/" zielfenster="_blank"><bild\x0aname="logo_euy.gif" rahmen="no"/></link>\x0a</absatz>\x0a\x0a<absatz><link ziel="http://www.cisco.de/" zielfenster="_blank">\x0a<bild name="logo_cisco.gif" rahmen="ja"/></link></absatz>\x0a\x0a<absatz><link ziel="http://www.atelion.de/"\x0azielfenster="_blank"><bild\x0aname="logo_atelion.gif" rahmen="no"/></link>\x0a</absatz>\x0a\x0a<absatz><link ziel="http://www.line-information.de/"\x0azielfenster="_blank">\x0a<bild name="logo_line_information.gif" rahmen="no"/></link>\x0a</absatz>\x0a\x0a<absatz><bild name="logo_aw.gif" rahmen="no"/></absatz>\x0a\x0a<absatz><link ziel="http://www.incognis.de/"\x0azielfenster="_blank"><bild\x0aname="logo_incognis.gif" rahmen="no"/></link></absatz>\x0a\x0a<absatz><link ziel="http://www.addcraft.com/"\x0azielfenster="_blank"><bild\x0aname="logo_addcraft.gif" rahmen="no"/></link></absatz>\x0a\x0a<absatz><link ziel="http://www.comendo.com/"\x0azielfenster="_blank"><bild\x0aname="logo_comendo.gif" rahmen="no"/></link></absatz>\x0a\x0a</inhalt>\x0a</seite>
1: seite
2: \x0a
3: seite
/^a/IF
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/line\nbreak/I
Capturing subpattern count = 0
No options
First char = 'l'
Need char = 'k'
this is a line\nbreak
0: line\x0abreak
line one\nthis is a line\nbreak in the second line
0: line\x0abreak
/line\nbreak/If
Capturing subpattern count = 0
Options: firstline
First char = 'l'
Need char = 'k'
this is a line\nbreak
0: line\x0abreak
** Failers
No match
line one\nthis is a line\nbreak in the second line
No match
/line\nbreak/Imf
Capturing subpattern count = 0
Options: multiline firstline
First char = 'l'
Need char = 'k'
this is a line\nbreak
0: line\x0abreak
** Failers
No match
line one\nthis is a line\nbreak in the second line
No match
/ab.cd/IP
ab-cd
0: ab-cd
ab=cd
0: ab=cd
** Failers
No match: POSIX code 17: match failed
ab\ncd
No match: POSIX code 17: match failed
/ab.cd/IPs
ab-cd
0: ab-cd
ab=cd
0: ab=cd
ab\ncd
0: ab\x0acd
/(?i)(?-i)AbCd/I
Capturing subpattern count = 0
No options
First char = 'A'
Need char = 'd'
AbCd
0: AbCd
** Failers
No match
abcd
No match
/a{11111111111111111111}/I
Failed: number too big in {} quantifier at offset 22
/(){64294967295}/I
Failed: number too big in {} quantifier at offset 14
/(){2,4294967295}/I
Failed: number too big in {} quantifier at offset 15
"(?i:a)(?i:b)(?i:c)(?i:d)(?i:e)(?i:f)(?i:g)(?i:h)(?i:i)(?i:j)(k)(?i:l)A\1B"I
Capturing subpattern count = 1
Max back reference = 1
No options
First char = 'a' (caseless)
Need char = 'B'
abcdefghijklAkB
0: abcdefghijklAkB
1: k
"(?P<n0>a)(?P<n1>b)(?P<n2>c)(?P<n3>d)(?P<n4>e)(?P<n5>f)(?P<n6>g)(?P<n7>h)(?P<n8>i)(?P<n9>j)(?P<n10>k)(?P<n11>l)A\11B"I
Capturing subpattern count = 12
Max back reference = 11
Named capturing subpatterns:
n0 1
n1 2
n10 11
n11 12
n2 3
n3 4
n4 5
n5 6
n6 7
n7 8
n8 9
n9 10
No options
First char = 'a'
Need char = 'B'
abcdefghijklAkB
0: abcdefghijklAkB
1: a
2: b
3: c
4: d
5: e
6: f
7: g
8: h
9: i
10: j
11: k
12: l
"(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)A\11B"I
Capturing subpattern count = 12
Max back reference = 11
No options
First char = 'a'
Need char = 'B'
abcdefghijklAkB
0: abcdefghijklAkB
1: a
2: b
3: c
4: d
5: e
6: f
7: g
8: h
9: i
10: j
11: k
12: l
"(?P<name0>a)(?P<name1>a)(?P<name2>a)(?P<name3>a)(?P<name4>a)(?P<name5>a)(?P<name6>a)(?P<name7>a)(?P<name8>a)(?P<name9>a)(?P<name10>a)(?P<name11>a)(?P<name12>a)(?P<name13>a)(?P<name14>a)(?P<name15>a)(?P<name16>a)(?P<name17>a)(?P<name18>a)(?P<name19>a)(?P<name20>a)(?P<name21>a)(?P<name22>a)(?P<name23>a)(?P<name24>a)(?P<name25>a)(?P<name26>a)(?P<name27>a)(?P<name28>a)(?P<name29>a)(?P<name30>a)(?P<name31>a)(?P<name32>a)(?P<name33>a)(?P<name34>a)(?P<name35>a)(?P<name36>a)(?P<name37>a)(?P<name38>a)(?P<name39>a)(?P<name40>a)(?P<name41>a)(?P<name42>a)(?P<name43>a)(?P<name44>a)(?P<name45>a)(?P<name46>a)(?P<name47>a)(?P<name48>a)(?P<name49>a)(?P<name50>a)(?P<name51>a)(?P<name52>a)(?P<name53>a)(?P<name54>a)(?P<name55>a)(?P<name56>a)(?P<name57>a)(?P<name58>a)(?P<name59>a)(?P<name60>a)(?P<name61>a)(?P<name62>a)(?P<name63>a)(?P<name64>a)(?P<name65>a)(?P<name66>a)(?P<name67>a)(?P<name68>a)(?P<name69>a)(?P<name70>a)(?P<name71>a)(?P<name72>a)(?P<name73>a)(?P<name74>a)(?P<name75>a)(?P<name76>a)(?P<name77>a)(?P<name78>a)(?P<name79>a)(?P<name80>a)(?P<name81>a)(?P<name82>a)(?P<name83>a)(?P<name84>a)(?P<name85>a)(?P<name86>a)(?P<name87>a)(?P<name88>a)(?P<name89>a)(?P<name90>a)(?P<name91>a)(?P<name92>a)(?P<name93>a)(?P<name94>a)(?P<name95>a)(?P<name96>a)(?P<name97>a)(?P<name98>a)(?P<name99>a)(?P<name100>a)"I
Capturing subpattern count = 101
Named capturing subpatterns:
name0 1
name1 2
name10 11
name100 101
name11 12
name12 13
name13 14
name14 15
name15 16
name16 17
name17 18
name18 19
name19 20
name2 3
name20 21
name21 22
name22 23
name23 24
name24 25
name25 26
name26 27
name27 28
name28 29
name29 30
name3 4
name30 31
name31 32
name32 33
name33 34
name34 35
name35 36
name36 37
name37 38
name38 39
name39 40
name4 5
name40 41
name41 42
name42 43
name43 44
name44 45
name45 46
name46 47
name47 48
name48 49
name49 50
name5 6
name50 51
name51 52
name52 53
name53 54
name54 55
name55 56
name56 57
name57 58
name58 59
name59 60
name6 7
name60 61
name61 62
name62 63
name63 64
name64 65
name65 66
name66 67
name67 68
name68 69
name69 70
name7 8
name70 71
name71 72
name72 73
name73 74
name74 75
name75 76
name76 77
name77 78
name78 79
name79 80
name8 9
name80 81
name81 82
name82 83
name83 84
name84 85
name85 86
name86 87
name87 88
name88 89
name89 90
name9 10
name90 91
name91 92
name92 93
name93 94
name94 95
name95 96
name96 97
name97 98
name98 99
name99 100
No options
First char = 'a'
Need char = 'a'
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Matched, but too many substrings
0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
1: a
2: a
3: a
4: a
5: a
6: a
7: a
8: a
9: a
10: a
11: a
12: a
13: a
14: a
"(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)"I
Capturing subpattern count = 101
No options
First char = 'a'
Need char = 'a'
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Matched, but too many substrings
0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
1: a
2: a
3: a
4: a
5: a
6: a
7: a
8: a
9: a
10: a
11: a
12: a
13: a
14: a
/[^()]*(?:\((?R)\)[^()]*)*/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
(this(and)that
0:
(this(and)that)
0: (this(and)that)
(this(and)that)stuff
0: (this(and)that)stuff
/[^()]*(?:\((?>(?R))\)[^()]*)*/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
(this(and)that
0:
(this(and)that)
0: (this(and)that)
/[^()]*(?:\((?R)\))*[^()]*/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
(this(and)that
0:
(this(and)that)
0: (this(and)that)
/(?:\((?R)\))*[^()]*/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
(this(and)that
0:
(this(and)that)
0:
((this))
0: ((this))
/(?:\((?R)\))|[^()]*/I
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
No need char
(this(and)that
0:
(this(and)that)
0:
(this)
0: (this)
((this))
0: ((this))
/a(b)c/IPN
abc
Matched with REG_NOSUB
/a(?P<name>b)c/IPN
abc
Matched with REG_NOSUB
/\x{100}/I
Failed: character value in \x{...} sequence is too large at offset 6
/\x{0000ff}/I
Capturing subpattern count = 0
No options
First char = 255
No need char
/^((?P<A>a1)|(?P<A>a2)b)/I
Failed: two named subpatterns have the same name at offset 17
/^((?P<A>a1)|(?P<A>a2)b)/IJ
Capturing subpattern count = 3
Named capturing subpatterns:
A 2
A 3
Options: anchored dupnames
No first char
No need char
a1b\CA
0: a1
1: a1
2: a1
C a1 (2) A
a2b\CA
0: a2b
1: a2b
2: <unset>
3: a2
C a2 (2) A
** Failers
No match
a1b\CZ\CA
no parentheses with name "Z"
0: a1
1: a1
2: a1
copy substring Z failed -7
C a1 (2) A
/^(?P<A>a)(?P<A>b)/IJ
Capturing subpattern count = 2
Named capturing subpatterns:
A 1
A 2
Options: anchored dupnames
No first char
No need char
ab\CA
0: ab
1: a
2: b
C a (1) A
/^(?P<A>a)(?P<A>b)|cd/IJ
Capturing subpattern count = 2
Named capturing subpatterns:
A 1
A 2
Options: dupnames
No first char
No need char
ab\CA
0: ab
1: a
2: b
C a (1) A
cd\CA
0: cd
copy substring A failed -7
/^(?P<A>a)(?P<A>b)|cd(?P<A>ef)(?P<A>gh)/IJ
Capturing subpattern count = 4
Named capturing subpatterns:
A 1
A 2
A 3
A 4
Options: dupnames
No first char
No need char
cdefgh\CA
0: cdefgh
1: <unset>
2: <unset>
3: ef
4: gh
C ef (2) A
/^((?P<A>a1)|(?P<A>a2)b)/IJ
Capturing subpattern count = 3
Named capturing subpatterns:
A 2
A 3
Options: anchored dupnames
No first char
No need char
a1b\GA
0: a1
1: a1
2: a1
G a1 (2) A
a2b\GA
0: a2b
1: a2b
2: <unset>
3: a2
G a2 (2) A
** Failers
No match
a1b\GZ\GA
no parentheses with name "Z"
0: a1
1: a1
2: a1
copy substring Z failed -7
G a1 (2) A
/^(?P<A>a)(?P<A>b)/IJ
Capturing subpattern count = 2
Named capturing subpatterns:
A 1
A 2
Options: anchored dupnames
No first char
No need char
ab\GA
0: ab
1: a
2: b
G a (1) A
/^(?P<A>a)(?P<A>b)|cd/IJ
Capturing subpattern count = 2
Named capturing subpatterns:
A 1
A 2
Options: dupnames
No first char
No need char
ab\GA
0: ab
1: a
2: b
G a (1) A
cd\GA
0: cd
copy substring A failed -7
/^(?P<A>a)(?P<A>b)|cd(?P<A>ef)(?P<A>gh)/IJ
Capturing subpattern count = 4
Named capturing subpatterns:
A 1
A 2
A 3
A 4
Options: dupnames
No first char
No need char
cdefgh\GA
0: cdefgh
1: <unset>
2: <unset>
3: ef
4: gh
G ef (2) A
/(?J)^((?P<A>a1)|(?P<A>a2)b)/I
Capturing subpattern count = 3
Named capturing subpatterns:
A 2
A 3
Options: anchored dupnames
No first char
No need char
a1b\CA
0: a1
1: a1
2: a1
C a1 (2) A
a2b\CA
0: a2b
1: a2b
2: <unset>
3: a2
C a2 (2) A
/^(?P<A>a) (?J:(?P<B>b)(?P<B>c)) (?P<A>d)/I
Failed: two named subpatterns have the same name at offset 37
/ In this next test, J is not set at the outer level; consequently it isn't
set in the pattern's options; consequently pcre_get_named_substring() produces
a random value. /Ix
Capturing subpattern count = 1
Options: extended
First char = 'I'
Need char = 'e'
/^(?P<A>a) (?J:(?P<B>b)(?P<B>c)) (?P<C>d)/I
Capturing subpattern count = 4
Named capturing subpatterns:
A 1
B 2
B 3
C 4
Options: anchored
No first char
No need char
a bc d\CA\CB\CC
0: a bc d
1: a
2: b
3: c
4: d
C a (1) A
C b (1) B
C d (1) C
/^(?P<A>a)?(?(A)a|b)/I
Capturing subpattern count = 1
Named capturing subpatterns:
A 1
Options: anchored
No first char
No need char
aabc
0: aa
1: a
bc
0: b
** Failers
No match
abc
No match
/(?:(?(ZZ)a|b)(?P<ZZ>X))+/I
Capturing subpattern count = 1
Named capturing subpatterns:
ZZ 1
No options
No first char
Need char = 'X'
bXaX
0: bXaX
1: X
/(?:(?(2y)a|b)(X))+/I
Failed: reference to non-existent subpattern at offset 9
/(?:(?(ZA)a|b)(?P<ZZ>X))+/I
Failed: reference to non-existent subpattern at offset 9
/(?:(?(ZZ)a|b)(?(ZZ)a|b)(?P<ZZ>X))+/I
Capturing subpattern count = 1
Named capturing subpatterns:
ZZ 1
No options
No first char
Need char = 'X'
bbXaaX
0: bbXaaX
1: X
/(?:(?(ZZ)a|\(b\))\\(?P<ZZ>X))+/I
Capturing subpattern count = 1
Named capturing subpatterns:
ZZ 1
No options
No first char
Need char = 'X'
(b)\\Xa\\X
0: (b)\Xa\X
1: X
/(?P<ABC/I
Failed: syntax error in subpattern name (missing terminator) at offset 7
/(?:(?(A)(?P=A)a|b)(?P<A>X|Y))+/I
Capturing subpattern count = 1
Max back reference = 1
Named capturing subpatterns:
A 1
No options
No first char
No need char
bXXaYYaY
0: bXXaYYaY
1: Y
bXYaXXaX
0: bX
1: X
/()()()()()()()()()(?:(?(A)(?P=A)a|b)(?P<A>X|Y))+/I
Capturing subpattern count = 10
Max back reference = 10
Named capturing subpatterns:
A 10
No options
No first char
No need char
bXXaYYaY
0: bXXaYYaY
1:
2:
3:
4:
5:
6:
7:
8:
9:
10: Y
/\777/I
Failed: octal value is greater than \377 (not in UTF-8 mode) at offset 3
/\s*,\s*/IS
Capturing subpattern count = 0
Partial matching not supported
No options
No first char
Need char = ','
Starting byte set: \x09 \x0a \x0c \x0d \x20 ,
\x0b,\x0b
0: ,
\x0c,\x0d
0: \x0c,\x0d
/^abc/Im
Capturing subpattern count = 0
Options: multiline
First char at start or follows newline
Need char = 'c'
xyz\nabc
0: abc
xyz\nabc\<lf>
0: abc
xyz\r\nabc\<lf>
0: abc
xyz\rabc\<cr>
0: abc
xyz\r\nabc\<crlf>
0: abc
** Failers
No match
xyz\nabc\<cr>
No match
xyz\r\nabc\<cr>
No match
xyz\nabc\<crlf>
No match
xyz\rabc\<crlf>
No match
xyz\rabc\<lf>
No match
/abc$/Im<lf>
Capturing subpattern count = 0
Options: multiline
Forced newline sequence: LF
First char = 'a'
Need char = 'c'
xyzabc
0: abc
xyzabc\n
0: abc
xyzabc\npqr
0: abc
xyzabc\r\<cr>
0: abc
xyzabc\rpqr\<cr>
0: abc
xyzabc\r\n\<crlf>
0: abc
xyzabc\r\npqr\<crlf>
0: abc
** Failers
No match
xyzabc\r
No match
xyzabc\rpqr
No match
xyzabc\r\n
No match
xyzabc\r\npqr
No match
/^abc/Im<cr>
Capturing subpattern count = 0
Options: multiline
Forced newline sequence: CR
First char at start or follows newline
Need char = 'c'
xyz\rabcdef
0: abc
xyz\nabcdef\<lf>
0: abc
** Failers
No match
xyz\nabcdef
No match
/^abc/Im<lf>
Capturing subpattern count = 0
Options: multiline
Forced newline sequence: LF
First char at start or follows newline
Need char = 'c'
xyz\nabcdef
0: abc
xyz\rabcdef\<cr>
0: abc
** Failers
No match
xyz\rabcdef
No match
/^abc/Im<crlf>
Capturing subpattern count = 0
Options: multiline
Forced newline sequence: CRLF
First char at start or follows newline
Need char = 'c'
xyz\r\nabcdef
0: abc
xyz\rabcdef\<cr>
0: abc
** Failers
No match
xyz\rabcdef
No match
/^abc/Im<bad>
Unknown newline type at: <bad>
/abc/I
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
xyz\rabc\<bad>
Unknown newline type at: <bad>
abc
0: abc
/.*/I<lf>
Capturing subpattern count = 0
Partial matching not supported
Options:
Forced newline sequence: LF
First char at start or follows newline
No need char
abc\ndef
0: abc
abc\rdef
0: abc\x0ddef
abc\r\ndef
0: abc\x0d
\<cr>abc\ndef
0: abc\x0adef
\<cr>abc\rdef
0: abc
\<cr>abc\r\ndef
0: abc
\<crlf>abc\ndef
0: abc\x0adef
\<crlf>abc\rdef
0: abc\x0ddef
\<crlf>abc\r\ndef
0: abc
/\w+(.)(.)?def/Is
Capturing subpattern count = 2
Partial matching not supported
Options: dotall
No first char
Need char = 'f'
abc\ndef
0: abc\x0adef
1: \x0a
abc\rdef
0: abc\x0ddef
1: \x0d
abc\r\ndef
0: abc\x0d\x0adef
1: \x0d
2: \x0a
+((?:\s|//.*\\n|/[*](?:\\n|.)*?[*]/)*)+I
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
/* this is a C style comment */\M
Minimum match() limit = 120
Minimum match() recursion limit = 6
0: /* this is a C style comment */
1: /* this is a C style comment */
/(?P<B>25[0-5]|2[0-4]\d|[01]?\d?\d)(?:\.(?P>B)){3}/I
Capturing subpattern count = 1
Named capturing subpatterns:
B 1
No options
No first char
Need char = '.'
/()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
(.(.))/Ix
Capturing subpattern count = 102
Options: extended
No first char
No need char
XY\O400
0: XY
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:
68:
69:
70:
71:
72:
73:
74:
75:
76:
77:
78:
79:
80:
81:
82:
83:
84:
85:
86:
87:
88:
89:
90:
91:
92:
93:
94:
95:
96:
97:
98:
99:
100:
101: XY
102: Y
/(a*b|(?i:c*(?-i)d))/IS
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
Starting byte set: C a b c d
/()[ab]xyz/IS
Capturing subpattern count = 1
No options
No first char
Need char = 'z'
Starting byte set: a b
/(|)[ab]xyz/IS
Capturing subpattern count = 1
No options
No first char
Need char = 'z'
Starting byte set: a b
/(|c)[ab]xyz/IS
Capturing subpattern count = 1
No options
No first char
Need char = 'z'
Starting byte set: a b c
/(|c?)[ab]xyz/IS
Capturing subpattern count = 1
No options
No first char
Need char = 'z'
Starting byte set: a b c
/(d?|c?)[ab]xyz/IS
Capturing subpattern count = 1
No options
No first char
Need char = 'z'
Starting byte set: a b c d
/(d?|c)[ab]xyz/IS
Capturing subpattern count = 1
No options
No first char
Need char = 'z'
Starting byte set: a b c d
/^a*b\d/D
------------------------------------------------------------------
0 9 Bra 0
3 ^
4 a*+
6 b
8 \d
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
Options: anchored
No first char
Need char = 'b'
/^a*+b\d/D
------------------------------------------------------------------
0 9 Bra 0
3 ^
4 a*+
6 b
8 \d
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
Options: anchored
No first char
Need char = 'b'
/^a*?b\d/D
------------------------------------------------------------------
0 9 Bra 0
3 ^
4 a*+
6 b
8 \d
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
Options: anchored
No first char
Need char = 'b'
/^a+A\d/D
------------------------------------------------------------------
0 9 Bra 0
3 ^
4 a++
6 A
8 \d
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
Options: anchored
No first char
Need char = 'A'
aaaA5
0: aaaA5
** Failers
No match
aaaa5
No match
/^a*A\d/IiD
------------------------------------------------------------------
0 9 Bra 0
3 ^
4 a*
6 NC A
8 \d
9 9 Ket
12 End
------------------------------------------------------------------
Capturing subpattern count = 0
Partial matching not supported
Options: anchored caseless
No first char
Need char = 'A' (caseless)
aaaA5
0: aaaA5
aaaa5
0: aaaa5
/(a*|b*)[cd]/IS
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
Starting byte set: a b c d
/(a+|b*)[cd]/IS
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
Starting byte set: a b c d
/(a*|b+)[cd]/IS
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
Starting byte set: a b c d
/(a+|b+)[cd]/IS
Capturing subpattern count = 1
Partial matching not supported
No options
No first char
No need char
Starting byte set: a b
/((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((
((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((
(((
a
))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
)))
/Ix
Capturing subpattern count = 203
Options: extended
First char = 'a'
No need char
large nest
Matched, but too many substrings
0: a
1: a
2: a
3: a
4: a
5: a
6: a
7: a
8: a
9: a
10: a
11: a
12: a
13: a
14: a
/a*\d/B
------------------------------------------------------------------
0 6 Bra 0
3 a*+
5 \d
6 6 Ket
9 End
------------------------------------------------------------------
/a*\D/B
------------------------------------------------------------------
0 6 Bra 0
3 a*
5 \D
6 6 Ket
9 End
------------------------------------------------------------------
/0*\d/B
------------------------------------------------------------------
0 6 Bra 0
3 0*
5 \d
6 6 Ket
9 End
------------------------------------------------------------------
/0*\D/B
------------------------------------------------------------------
0 6 Bra 0
3 0*+
5 \D
6 6 Ket
9 End
------------------------------------------------------------------
/a*\s/B
------------------------------------------------------------------
0 6 Bra 0
3 a*+
5 \s
6 6 Ket
9 End
------------------------------------------------------------------
/a*\S/B
------------------------------------------------------------------
0 6 Bra 0
3 a*
5 \S
6 6 Ket
9 End
------------------------------------------------------------------
/ *\s/B
------------------------------------------------------------------
0 6 Bra 0
3 *
5 \s
6 6 Ket
9 End
------------------------------------------------------------------
/ *\S/B
------------------------------------------------------------------
0 6 Bra 0
3 *+
5 \S
6 6 Ket
9 End
------------------------------------------------------------------
/a*\w/B
------------------------------------------------------------------
0 6 Bra 0
3 a*
5 \w
6 6 Ket
9 End
------------------------------------------------------------------
/a*\W/B
------------------------------------------------------------------
0 6 Bra 0
3 a*+
5 \W
6 6 Ket
9 End
------------------------------------------------------------------
/=*\w/B
------------------------------------------------------------------
0 6 Bra 0
3 =*+
5 \w
6 6 Ket
9 End
------------------------------------------------------------------
/=*\W/B
------------------------------------------------------------------
0 6 Bra 0
3 =*
5 \W
6 6 Ket
9 End
------------------------------------------------------------------
/\d*a/B
------------------------------------------------------------------
0 7 Bra 0
3 \d*+
5 a
7 7 Ket
10 End
------------------------------------------------------------------
/\d*2/B
------------------------------------------------------------------
0 7 Bra 0
3 \d*
5 2
7 7 Ket
10 End
------------------------------------------------------------------
/\d*\d/B
------------------------------------------------------------------
0 6 Bra 0
3 \d*
5 \d
6 6 Ket
9 End
------------------------------------------------------------------
/\d*\D/B
------------------------------------------------------------------
0 6 Bra 0
3 \d*+
5 \D
6 6 Ket
9 End
------------------------------------------------------------------
/\d*\s/B
------------------------------------------------------------------
0 6 Bra 0
3 \d*+
5 \s
6 6 Ket
9 End
------------------------------------------------------------------
/\d*\S/B
------------------------------------------------------------------
0 6 Bra 0
3 \d*
5 \S
6 6 Ket
9 End
------------------------------------------------------------------
/\d*\w/B
------------------------------------------------------------------
0 6 Bra 0
3 \d*
5 \w
6 6 Ket
9 End
------------------------------------------------------------------
/\d*\W/B
------------------------------------------------------------------
0 6 Bra 0
3 \d*+
5 \W
6 6 Ket
9 End
------------------------------------------------------------------
/\D*a/B
------------------------------------------------------------------
0 7 Bra 0
3 \D*
5 a
7 7 Ket
10 End
------------------------------------------------------------------
/\D*2/B
------------------------------------------------------------------
0 7 Bra 0
3 \D*+
5 2
7 7 Ket
10 End
------------------------------------------------------------------
/\D*\d/B
------------------------------------------------------------------
0 6 Bra 0
3 \D*+
5 \d
6 6 Ket
9 End
------------------------------------------------------------------
/\D*\D/B
------------------------------------------------------------------
0 6 Bra 0
3 \D*
5 \D
6 6 Ket
9 End
------------------------------------------------------------------
/\D*\s/B
------------------------------------------------------------------
0 6 Bra 0
3 \D*
5 \s
6 6 Ket
9 End
------------------------------------------------------------------
/\D*\S/B
------------------------------------------------------------------
0 6 Bra 0
3 \D*
5 \S
6 6 Ket
9 End
------------------------------------------------------------------
/\D*\w/B
------------------------------------------------------------------
0 6 Bra 0
3 \D*
5 \w
6 6 Ket
9 End
------------------------------------------------------------------
/\D*\W/B
------------------------------------------------------------------
0 6 Bra 0
3 \D*
5 \W
6 6 Ket
9 End
------------------------------------------------------------------
/\s*a/B
------------------------------------------------------------------
0 7 Bra 0
3 \s*+
5 a
7 7 Ket
10 End
------------------------------------------------------------------
/\s*2/B
------------------------------------------------------------------
0 7 Bra 0
3 \s*+
5 2
7 7 Ket
10 End
------------------------------------------------------------------
/\s*\d/B
------------------------------------------------------------------
0 6 Bra 0
3 \s*+
5 \d
6 6 Ket
9 End
------------------------------------------------------------------
/\s*\D/B
------------------------------------------------------------------
0 6 Bra 0
3 \s*
5 \D
6 6 Ket
9 End
------------------------------------------------------------------
/\s*\s/B
------------------------------------------------------------------
0 6 Bra 0
3 \s*
5 \s
6 6 Ket
9 End
------------------------------------------------------------------
/\s*\S/B
------------------------------------------------------------------
0 6 Bra 0
3 \s*+
5 \S
6 6 Ket
9 End
------------------------------------------------------------------
/\s*\w/B
------------------------------------------------------------------
0 6 Bra 0
3 \s*+
5 \w
6 6 Ket
9 End
------------------------------------------------------------------
/\s*\W/B
------------------------------------------------------------------
0 6 Bra 0
3 \s*
5 \W
6 6 Ket
9 End
------------------------------------------------------------------
/\S*a/B
------------------------------------------------------------------
0 7 Bra 0
3 \S*
5 a
7 7 Ket
10 End
------------------------------------------------------------------
/\S*2/B
------------------------------------------------------------------
0 7 Bra 0
3 \S*
5 2
7 7 Ket
10 End
------------------------------------------------------------------
/\S*\d/B
------------------------------------------------------------------
0 6 Bra 0
3 \S*
5 \d
6 6 Ket
9 End
------------------------------------------------------------------
/\S*\D/B
------------------------------------------------------------------
0 6 Bra 0
3 \S*
5 \D
6 6 Ket
9 End
------------------------------------------------------------------
/\S*\s/B
------------------------------------------------------------------
0 6 Bra 0
3 \S*+
5 \s
6 6 Ket
9 End
------------------------------------------------------------------
/\S*\S/B
------------------------------------------------------------------
0 6 Bra 0
3 \S*
5 \S
6 6 Ket
9 End
------------------------------------------------------------------
/\S*\w/B
------------------------------------------------------------------
0 6 Bra 0
3 \S*
5 \w
6 6 Ket
9 End
------------------------------------------------------------------
/\S*\W/B
------------------------------------------------------------------
0 6 Bra 0
3 \S*
5 \W
6 6 Ket
9 End
------------------------------------------------------------------
/\w*a/B
------------------------------------------------------------------
0 7 Bra 0
3 \w*
5 a
7 7 Ket
10 End
------------------------------------------------------------------
/\w*2/B
------------------------------------------------------------------
0 7 Bra 0
3 \w*
5 2
7 7 Ket
10 End
------------------------------------------------------------------
/\w*\d/B
------------------------------------------------------------------
0 6 Bra 0
3 \w*
5 \d
6 6 Ket
9 End
------------------------------------------------------------------
/\w*\D/B
------------------------------------------------------------------
0 6 Bra 0
3 \w*
5 \D
6 6 Ket
9 End
------------------------------------------------------------------
/\w*\s/B
------------------------------------------------------------------
0 6 Bra 0
3 \w*+
5 \s
6 6 Ket
9 End
------------------------------------------------------------------
/\w*\S/B
------------------------------------------------------------------
0 6 Bra 0
3 \w*
5 \S
6 6 Ket
9 End
------------------------------------------------------------------
/\w*\w/B
------------------------------------------------------------------
0 6 Bra 0
3 \w*
5 \w
6 6 Ket
9 End
------------------------------------------------------------------
/\w*\W/B
------------------------------------------------------------------
0 6 Bra 0
3 \w*+
5 \W
6 6 Ket
9 End
------------------------------------------------------------------
/\W*a/B
------------------------------------------------------------------
0 7 Bra 0
3 \W*+
5 a
7 7 Ket
10 End
------------------------------------------------------------------
/\W*2/B
------------------------------------------------------------------
0 7 Bra 0
3 \W*+
5 2
7 7 Ket
10 End
------------------------------------------------------------------
/\W*\d/B
------------------------------------------------------------------
0 6 Bra 0
3 \W*+
5 \d
6 6 Ket
9 End
------------------------------------------------------------------
/\W*\D/B
------------------------------------------------------------------
0 6 Bra 0
3 \W*
5 \D
6 6 Ket
9 End
------------------------------------------------------------------
/\W*\s/B
------------------------------------------------------------------
0 6 Bra 0
3 \W*
5 \s
6 6 Ket
9 End
------------------------------------------------------------------
/\W*\S/B
------------------------------------------------------------------
0 6 Bra 0
3 \W*
5 \S
6 6 Ket
9 End
------------------------------------------------------------------
/\W*\w/B
------------------------------------------------------------------
0 6 Bra 0
3 \W*+
5 \w
6 6 Ket
9 End
------------------------------------------------------------------
/\W*\W/B
------------------------------------------------------------------
0 6 Bra 0
3 \W*
5 \W
6 6 Ket
9 End
------------------------------------------------------------------
/[^a]+a/B
------------------------------------------------------------------
0 7 Bra 0
3 [^a]++
5 a
7 7 Ket
10 End
------------------------------------------------------------------
/[^a]+a/Bi
------------------------------------------------------------------
0 7 Bra 0
3 [^A]++
5 NC a
7 7 Ket
10 End
------------------------------------------------------------------
/[^a]+A/Bi
------------------------------------------------------------------
0 7 Bra 0
3 [^A]++
5 NC A
7 7 Ket
10 End
------------------------------------------------------------------
/[^a]+b/B
------------------------------------------------------------------
0 7 Bra 0
3 [^a]+
5 b
7 7 Ket
10 End
------------------------------------------------------------------
/[^a]+\d/B
------------------------------------------------------------------
0 6 Bra 0
3 [^a]+
5 \d
6 6 Ket
9 End
------------------------------------------------------------------
/a*[^a]/B
------------------------------------------------------------------
0 7 Bra 0
3 a*
5 [^a]
7 7 Ket
10 End
------------------------------------------------------------------
/(?P<abc>x)(?P<xyz>y)/I
Capturing subpattern count = 2
Named capturing subpatterns:
abc 1
xyz 2
No options
First char = 'x'
Need char = 'y'
xy\Cabc\Cxyz
0: xy
1: x
2: y
C x (1) abc
C y (1) xyz
/(?<abc>x)(?'xyz'y)/I
Capturing subpattern count = 2
Named capturing subpatterns:
abc 1
xyz 2
No options
First char = 'x'
Need char = 'y'
xy\Cabc\Cxyz
0: xy
1: x
2: y
C x (1) abc
C y (1) xyz
/(?<abc'x)(?'xyz'y)/I
Failed: syntax error in subpattern name (missing terminator) at offset 6
/(?<abc>x)(?'xyz>y)/I
Failed: syntax error in subpattern name (missing terminator) at offset 15
/(?P'abc'x)(?P<xyz>y)/I
Failed: unrecognized character after (?P at offset 3
/^(?:(?(ZZ)a|b)(?<ZZ>X))+/
bXaX
0: bXaX
1: X
bXbX
0: bX
1: X
** Failers
No match
aXaX
No match
aXbX
No match
/^(?P>abc)(?<abcd>xxx)/
Failed: reference to non-existent subpattern at offset 8
/^(?P>abc)(?<abc>x|y)/
xx
0: xx
1: x
xy
0: xy
1: y
yy
0: yy
1: y
yx
0: yx
1: x
/^(?P>abc)(?P<abc>x|y)/
xx
0: xx
1: x
xy
0: xy
1: y
yy
0: yy
1: y
yx
0: yx
1: x
/^((?(abc)a|b)(?<abc>x|y))+/
bxay
0: bxay
1: ay
2: y
bxby
0: bx
1: bx
2: x
** Failers
No match
axby
No match
/^(((?P=abc)|X)(?<abc>x|y))+/
XxXxxx
0: XxXxxx
1: xx
2: x
3: x
XxXyyx
0: XxXyyx
1: yx
2: y
3: x
XxXyxx
0: XxXy
1: Xy
2: X
3: y
** Failers
No match
x
No match
/^(?1)(abc)/
abcabc
0: abcabc
1: abc
/^(?:(?:\1|X)(a|b))+/
Xaaa
0: Xaaa
1: a
Xaba
0: Xa
1: a
/^[\E\Qa\E-\Qz\E]+/B
------------------------------------------------------------------
0 38 Bra 0
3 ^
4 [a-z]+
38 38 Ket
41 End
------------------------------------------------------------------
/^[a\Q]bc\E]/B
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\]a-c]
37 37 Ket
40 End
------------------------------------------------------------------
/^[a-\Q\E]/B
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\-a]
37 37 Ket
40 End
------------------------------------------------------------------
/^(?P>abc)[()](?<abc>)/B
------------------------------------------------------------------
0 54 Bra 0
3 ^
4 6 Once
7 46 Recurse
10 6 Ket
13 [()]
46 5 Bra 1
51 5 Ket
54 54 Ket
57 End
------------------------------------------------------------------
/^((?(abc)y)[()](?P<abc>x))+/B
------------------------------------------------------------------
0 66 Bra 0
3 ^
4 59 Bra 1
9 8 Cond
12 2 Cond ref
15 y
17 8 Ket
20 [()]
53 7 Bra 2
58 x
60 7 Ket
63 59 KetRmax
66 66 Ket
69 End
------------------------------------------------------------------
(xy)x
0: (xy)x
1: y)x
2: x
/^(?P>abc)\Q()\E(?<abc>)/B
------------------------------------------------------------------
0 25 Bra 0
3 ^
4 6 Once
7 17 Recurse
10 6 Ket
13 ()
17 5 Bra 1
22 5 Ket
25 25 Ket
28 End
------------------------------------------------------------------
/^(?P>abc)[a\Q(]\E(](?<abc>)/B
------------------------------------------------------------------
0 54 Bra 0
3 ^
4 6 Once
7 46 Recurse
10 6 Ket
13 [(\]a]
46 5 Bra 1
51 5 Ket
54 54 Ket
57 End
------------------------------------------------------------------
/^(?P>abc) # this is (a comment)
(?<abc>)/Bx
------------------------------------------------------------------
0 21 Bra 0
3 ^
4 6 Once
7 13 Recurse
10 6 Ket
13 5 Bra 1
18 5 Ket
21 21 Ket
24 End
------------------------------------------------------------------
/^\W*(?:(?<one>(?<two>.)\W*(?&one)\W*\k<two>|)|(?<three>(?<four>.)\W*(?&three)\W*\k'four'|\W*.\W*))\W*$/Ii
Capturing subpattern count = 4
Max back reference = 4
Named capturing subpatterns:
four 4
one 1
three 3
two 2
Partial matching not supported
Options: anchored caseless
No first char
No need char
1221
0: 1221
1: 1221
2: 1
Satan, oscillate my metallic sonatas!
0: Satan, oscillate my metallic sonatas!
1: <unset>
2: <unset>
3: Satan, oscillate my metallic sonatas
4: S
A man, a plan, a canal: Panama!
0: A man, a plan, a canal: Panama!
1: <unset>
2: <unset>
3: A man, a plan, a canal: Panama
4: A
Able was I ere I saw Elba.
0: Able was I ere I saw Elba.
1: <unset>
2: <unset>
3: Able was I ere I saw Elba
4: A
*** Failers
No match
The quick brown fox
No match
/(?=(\w+))\1:/I
Capturing subpattern count = 1
Max back reference = 1
Partial matching not supported
No options
No first char
Need char = ':'
abcd:
0: abcd:
1: abcd
/(?=(?'abc'\w+))\k<abc>:/I
Capturing subpattern count = 1
Max back reference = 1
Named capturing subpatterns:
abc 1
Partial matching not supported
No options
No first char
Need char = ':'
abcd:
0: abcd:
1: abcd
/(?'abc'\w+):\k<abc>{2}/
a:aaxyz
0: a:aa
1: a
ab:ababxyz
0: ab:abab
1: ab
** Failers
No match
a:axyz
No match
ab:abxyz
No match
/(?'abc'a|b)(?<abc>d|e)\k<abc>{2}/J
adaa
0: adaa
1: a
2: d
** Failers
No match
addd
No match
adbb
No match
/(?'abc'a|b)(?<abc>d|e)(?&abc){2}/J
bdaa
0: bdaa
1: b
2: d
bdab
0: bdab
1: b
2: d
** Failers
No match
bddd
No match
/^(?<ab>a)? (?(<ab>)b|c) (?('ab')d|e)/x
abd
0: abd
1: a
ce
0: ce
/(?(<bc))/
Failed: malformed number or name after (?( at offset 6
/(?(''))/
Failed: assertion expected after (?( at offset 4
/(?('R')stuff)/
Failed: reference to non-existent subpattern at offset 7
/((abc (?(R) (?(R1)1) (?(R2)2) X | (?1) (?2) (?R) ))) /x
abcabc1Xabc2XabcXabcabc
0: abcabc1Xabc2XabcX
1: abcabc1Xabc2XabcX
2: abcabc1Xabc2XabcX
/(?<A> (?'B' abc (?(R) (?(R&A)1) (?(R&B)2) X | (?1) (?2) (?R) ))) /x
abcabc1Xabc2XabcXabcabc
0: abcabc1Xabc2XabcX
1: abcabc1Xabc2XabcX
2: abcabc1Xabc2XabcX
/(?<A> (?'B' abc (?(R) (?(R&1)1) (?(R&B)2) X | (?1) (?2) (?R) ))) /x
Failed: reference to non-existent subpattern at offset 29
/(?<1> (?'B' abc (?(R) (?(R&1)1) (?(R&B)2) X | (?1) (?2) (?R) ))) /x
abcabc1Xabc2XabcXabcabc
0: abcabc1Xabc2XabcX
1: abcabc1Xabc2XabcX
2: abcabc1Xabc2XabcX
/^(?(DEFINE) (?<A> a) (?<B> b) ) (?&A) (?&B) /x
abcd
0: ab
1: <unset>
2: <unset>
/(?<NAME>(?&NAME_PAT))\s+(?<ADDR>(?&ADDRESS_PAT))
(?(DEFINE)
(?<NAME_PAT>[a-z]+)
(?<ADDRESS_PAT>\d+)
)/x
metcalfe 33
0: metcalfe 33
1: metcalfe
2: 33
3: <unset>
4: <unset>
/^(?(DEFINE) abc | xyz ) /x
Failed: DEFINE group contains more than one branch at offset 22
/(?(DEFINE) abc) xyz/xI
Capturing subpattern count = 0
Options: extended
First char = 'x'
Need char = 'z'
/(?(DEFINE) abc){3} xyz/x
Failed: repeating a DEFINE group is not allowed at offset 17
/(a|)*\d/
\O0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
No match
\O0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
Matched, but too many substrings
/^a.b/<lf>
a\rb
0: a\x0db
a\nb\<cr>
0: a\x0ab
** Failers
No match
a\nb
No match
a\nb\<any>
No match
a\rb\<cr>
No match
a\rb\<any>
No match
/^abc./mgx<any>
abc1 \x0aabc2 \x0babc3xx \x0cabc4 \x0dabc5xx \x0d\x0aabc6 \x85abc7 \x{2028}abc8 \x{2029}abc9 JUNK
0: abc1
0: abc2
0: abc3
0: abc4
0: abc5
0: abc6
0: abc7
/abc.$/mgx<any>
abc1\x0a abc2\x0b abc3\x0c abc4\x0d abc5\x0d\x0a abc6\x85 abc7\x{2028} abc8\x{2029} abc9
0: abc1
0: abc2
0: abc3
0: abc4
0: abc5
0: abc6
0: abc9
/a/<cr><any>
Failed: inconsistent NEWLINE options at offset 0
/a/<any><crlf>
Failed: inconsistent NEWLINE options at offset 0
/^a\Rb/
a\nb
0: a\x0ab
a\rb
0: a\x0db
a\r\nb
0: a\x0d\x0ab
a\x0bb
0: a\x0bb
a\x0cb
0: a\x0cb
a\x85b
0: a\x85b
** Failers
No match
a\n\rb
No match
/^a\R*b/
ab
0: ab
a\nb
0: a\x0ab
a\rb
0: a\x0db
a\r\nb
0: a\x0d\x0ab
a\x0bb
0: a\x0bb
a\x0cb
0: a\x0cb
a\x85b
0: a\x85b
a\n\rb
0: a\x0a\x0db
a\n\r\x85\x0cb
0: a\x0a\x0d\x85\x0cb
/^a\R+b/
a\nb
0: a\x0ab
a\rb
0: a\x0db
a\r\nb
0: a\x0d\x0ab
a\x0bb
0: a\x0bb
a\x0cb
0: a\x0cb
a\x85b
0: a\x85b
a\n\rb
0: a\x0a\x0db
a\n\r\x85\x0cb
0: a\x0a\x0d\x85\x0cb
** Failers
No match
ab
No match
/^a\R{1,3}b/
a\nb
0: a\x0ab
a\n\rb
0: a\x0a\x0db
a\n\r\x85b
0: a\x0a\x0d\x85b
a\r\n\r\nb
0: a\x0d\x0a\x0d\x0ab
a\r\n\r\n\r\nb
0: a\x0d\x0a\x0d\x0a\x0d\x0ab
a\n\r\n\rb
0: a\x0a\x0d\x0a\x0db
a\n\n\r\nb
0: a\x0a\x0a\x0d\x0ab
** Failers
No match
a\n\n\n\rb
No match
a\r
No match
/^a[\R]b/
aRb
0: aRb
** Failers
No match
a\nb
No match
/(?&abc)X(?<abc>P)/I
Capturing subpattern count = 1
Named capturing subpatterns:
abc 1
No options
No first char
Need char = 'P'
abcPXP123
0: PXP
1: P
/(?1)X(?<abc>P)/I
Capturing subpattern count = 1
Named capturing subpatterns:
abc 1
No options
No first char
Need char = 'P'
abcPXP123
0: PXP
1: P
/(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))\b(?&byte)(\.(?&byte)){3}/
1.2.3.4
0: 1.2.3.4
1: <unset>
2: .4
131.111.10.206
0: 131.111.10.206
1: <unset>
2: .206
10.0.0.0
0: 10.0.0.0
1: <unset>
2: .0
** Failers
No match
10.6
No match
455.3.4.5
No match
/\b(?&byte)(\.(?&byte)){3}(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))/
1.2.3.4
0: 1.2.3.4
1: .4
2: <unset>
131.111.10.206
0: 131.111.10.206
1: .206
2: <unset>
10.0.0.0
0: 10.0.0.0
1: .0
2: <unset>
** Failers
No match
10.6
No match
455.3.4.5
No match
/(?:a(?&abc)b)*(?<abc>x)/
123axbaxbaxbx456
0: axbaxbaxbx
1: x
123axbaxbaxb456
0: x
1: x
/(?:a(?&abc)b){1,5}(?<abc>x)/
123axbaxbaxbx456
0: axbaxbaxbx
1: x
/(?:a(?&abc)b){2,5}(?<abc>x)/
123axbaxbaxbx456
0: axbaxbaxbx
1: x
/(?:a(?&abc)b){2,}(?<abc>x)/
123axbaxbaxbx456
0: axbaxbaxbx
1: x
/(abc)(?i:(?1))/
defabcabcxyz
0: abcabc
1: abc
DEFabcABCXYZ
No match
/(abc)(?:(?i)(?1))/
defabcabcxyz
0: abcabc
1: abc
DEFabcABCXYZ
No match
/^(a(b))\1\g1\g{1}\g-1\g{-1}\g{-02}Z/
ababababbbabZXXXX
0: ababababbbabZ
1: ab
2: b
/^(a)\g-2/
Failed: reference to non-existent subpattern at offset 4
/^(a)\g/
Failed: \g is not followed by an (optionally braced) non-zero number at offset 4
/^(a)\g{0}/
Failed: \g is not followed by an (optionally braced) non-zero number at offset 4
/^(a)\g{3/
Failed: \g is not followed by an (optionally braced) non-zero number at offset 4
/^(a)\g{4a}/
Failed: \g is not followed by an (optionally braced) non-zero number at offset 4
/^a.b/<lf>
a\rb
0: a\x0db
*** Failers
No match
a\nb
No match
/.+foo/
afoo
0: afoo
** Failers
No match
\r\nfoo
No match
\nfoo
No match
/.+foo/<crlf>
afoo
0: afoo
\nfoo
0: \x0afoo
** Failers
No match
\r\nfoo
No match
/.+foo/<any>
afoo
0: afoo
** Failers
No match
\nfoo
No match
\r\nfoo
No match
/.+foo/s
afoo
0: afoo
\r\nfoo
0: \x0d\x0afoo
\nfoo
0: \x0afoo
/ End of testinput2 /