--TEST--
Test key(), current(), next() & reset() functions
--FILE--
<?php
/* Prototype & Usage:
mixed key ( array &$array ) -> returns the index element of the current array position
mixed current ( array &$array ) -> returns the current element in the array
mixed next ( array &$array ) -> similar to current() but advances the internal pointer to next element
mixed reset ( array &$array ) -> Reset the internal pointer to first element
*/
$basic_arrays = array (
array(0), // array with element as 0
array(1), // array with single element
array(1,2, 3, -1, -2, -3), // array of integers
array(1.1, 2.2, 3.3, -1.1, -2.2, -3.3), // array of floats
array('a', 'b', 'c', "ab", "ac", "ad"), // string array
array("a" => "apple", "b" => "book", "c" => "cook"), // associative array
array('d' => 'drink', 'p' => 'port', 's' => 'set'), // another associative array
array(1 => 'One', 2 => 'two', 3 => "three") // associative array with key as integers
);
$varient_arrays = array (
array(), // empty array
array(""), // array with null string
array(NULL),// array with NULL
array(null),// array with null
array(NULL, true, null, "", 1), // mixed array
array(-1.5 => "test", -2 => "rest", 2.5 => "two",
"" => "string", 0 => "zero", "" => "" ) // mixed array
);
echo "*** Testing basic operations ***\n";
$loop_count = 1;
foreach ($basic_arrays as $sub_array ) {
echo "-- Iteration $loop_count --\n";
$loop_count++;
$c = count ($sub_array);
$c++; // increment by one to create the situation of accessing beyond array size
while ( $c ) {
var_dump( current($sub_array)); // current element
var_dump( key($sub_array) ); // key of the current element
var_dump( next($sub_array) ); // move to next element
$c --;
}
var_dump( reset($sub_array) ); // reset the internal pointer to first element
var_dump( key($sub_array) ); // access the array after reset
var_dump( $sub_array ); // dump the array to see that its intact
echo "\n";
}
echo "\n*** Testing possible variations ***\n";
$loop_count = 1;
foreach ($varient_arrays as $sub_array ) {
echo "-- Iteration $loop_count --\n";
$loop_count++;
$c = count ($sub_array);
$c++; // increment by one to create the situation of accessing beyond array size
while ( $c ) {
var_dump( current($sub_array)); // current element
var_dump( key($sub_array) ); // key of the current element
var_dump( next($sub_array) ); // move to next element
$c --;
}
var_dump( reset($sub_array) ); // reset the internal pointer to first element
var_dump( key($sub_array) ); // access the array after reset
var_dump( $sub_array ); // dump the array to see that its intact
echo "\n";
}
/*test these functions on array which is already unset */
echo "\n-- Testing variation: when array is unset --\n";
$unset_array = array (1);
unset($unset_array);
var_dump( current($unset_array) );
var_dump( key($unset_array) );
var_dump( next($unset_array) );
var_dump( reset($unset_array) );
echo "\n*** Testing error conditions ***\n";
//Zero argument, expected 1 argument
var_dump( key() );
var_dump( current() );
var_dump( reset() );
var_dump( next() );
// args more than expected, expected 1 argument
$temp_array = array(1);
var_dump( key($temp_array, $temp_array) );
var_dump( current($temp_array, $temp_array) );
var_dump( reset($temp_array, $temp_array) );
var_dump( next($temp_array, $temp_array) );
// invalid args type, valid arguement: array
$int_var = 1;
$float_var = 1.5;
$string = "string";
var_dump( key($int_var) );
var_dump( key($float_var) );
var_dump( key($string) );
var_dump( current($int_var) );
var_dump( current($float_var) );
var_dump( current($string) );
var_dump( next($int_var) );
var_dump( next($float_var) );
var_dump( next($string) );
var_dump( reset($int_var) );
var_dump( reset($float_var) );
var_dump( reset($string) );
echo "\n*** Testing operation on Objects ***\n";
// class having members of different scope
class test_class
{
private $private_var = "private_var";
public $public_var = "public_var";
protected $protected_var = "protected_var";
private $var1 = 10;
public $var2 = 30;
protected $var3 = 40;
var $integer = 3092;
private function private_fun() {
echo "private_fun() called\n";
}
protected function protected_fun() {
echo "protected_fun() called\n";
}
public function public_fun() {
echo "public_fun() called\n";
}
}
// class with no member variables
class zero_member_var_class
{
public function fun() {
echo "fun() called\n";
}
}
// class with no members
class zero_member_class
{
// no members
}
//create object of all classes defined above
$test_class_obj = new test_class();
$zero_member_var_class_obj = new zero_member_var_class();
$zero_member_class_obj = new zero_member_class();
$object_array = array (
$test_class_obj,
$zero_member_var_class_obj,
$zero_member_class_obj
);
/* loop to use function key(), current(), next() and reset()
on different class objects */
$loop_count = 1;
foreach( $object_array as $object ) {
echo "--- Outerloop Iteration $loop_count ---\n";
/* dump the object before performing operation on it */
echo "Object before performing operations ...\n";
var_dump($object) ;
/* loop to feach all the key/value pair from the object*/
$inner_loop_count = 1;
do {
echo "-- Innerloop iteration $inner_loop_count of Outerloop Iteration $loop_count --\n";
$inner_loop_count ++;
// print the key/value pair of the current value
echo "current => "; var_dump( current($object) ); // key & value pair
echo "key => "; var_dump( key($object) ); // key
$next_pair = next($object);
echo "next => "; var_dump($next_pair);
} while( FALSE != $next_pair );
$loop_count++;
/* reset the object */
echo "reset => "; var_dump( reset($object) );
echo "current => "; var_dump( current($object) ); // first variable in object
echo "\nObject after performing operations ...\n";
var_dump($object) ; // no change expected
}
echo "Done\n";
?>
--EXPECTF--
*** Testing basic operations ***
-- Iteration 1 --
int(0)
int(0)
bool(false)
bool(false)
NULL
bool(false)
int(0)
int(0)
array(1) {
[0]=>
int(0)
}
-- Iteration 2 --
int(1)
int(0)
bool(false)
bool(false)
NULL
bool(false)
int(1)
int(0)
array(1) {
[0]=>
int(1)
}
-- Iteration 3 --
int(1)
int(0)
int(2)
int(2)
int(1)
int(3)
int(3)
int(2)
int(-1)
int(-1)
int(3)
int(-2)
int(-2)
int(4)
int(-3)
int(-3)
int(5)
bool(false)
bool(false)
NULL
bool(false)
int(1)
int(0)
array(6) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(-1)
[4]=>
int(-2)
[5]=>
int(-3)
}
-- Iteration 4 --
float(1.1)
int(0)
float(2.2)
float(2.2)
int(1)
float(3.3)
float(3.3)
int(2)
float(-1.1)
float(-1.1)
int(3)
float(-2.2)
float(-2.2)
int(4)
float(-3.3)
float(-3.3)
int(5)
bool(false)
bool(false)
NULL
bool(false)
float(1.1)
int(0)
array(6) {
[0]=>
float(1.1)
[1]=>
float(2.2)
[2]=>
float(3.3)
[3]=>
float(-1.1)
[4]=>
float(-2.2)
[5]=>
float(-3.3)
}
-- Iteration 5 --
string(1) "a"
int(0)
string(1) "b"
string(1) "b"
int(1)
string(1) "c"
string(1) "c"
int(2)
string(2) "ab"
string(2) "ab"
int(3)
string(2) "ac"
string(2) "ac"
int(4)
string(2) "ad"
string(2) "ad"
int(5)
bool(false)
bool(false)
NULL
bool(false)
string(1) "a"
int(0)
array(6) {
[0]=>
string(1) "a"
[1]=>
string(1) "b"
[2]=>
string(1) "c"
[3]=>
string(2) "ab"
[4]=>
string(2) "ac"
[5]=>
string(2) "ad"
}
-- Iteration 6 --
string(5) "apple"
string(1) "a"
string(4) "book"
string(4) "book"
string(1) "b"
string(4) "cook"
string(4) "cook"
string(1) "c"
bool(false)
bool(false)
NULL
bool(false)
string(5) "apple"
string(1) "a"
array(3) {
["a"]=>
string(5) "apple"
["b"]=>
string(4) "book"
["c"]=>
string(4) "cook"
}
-- Iteration 7 --
string(5) "drink"
string(1) "d"
string(4) "port"
string(4) "port"
string(1) "p"
string(3) "set"
string(3) "set"
string(1) "s"
bool(false)
bool(false)
NULL
bool(false)
string(5) "drink"
string(1) "d"
array(3) {
["d"]=>
string(5) "drink"
["p"]=>
string(4) "port"
["s"]=>
string(3) "set"
}
-- Iteration 8 --
string(3) "One"
int(1)
string(3) "two"
string(3) "two"
int(2)
string(5) "three"
string(5) "three"
int(3)
bool(false)
bool(false)
NULL
bool(false)
string(3) "One"
int(1)
array(3) {
[1]=>
string(3) "One"
[2]=>
string(3) "two"
[3]=>
string(5) "three"
}
*** Testing possible variations ***
-- Iteration 1 --
bool(false)
NULL
bool(false)
bool(false)
NULL
array(0) {
}
-- Iteration 2 --
string(0) ""
int(0)
bool(false)
bool(false)
NULL
bool(false)
string(0) ""
int(0)
array(1) {
[0]=>
string(0) ""
}
-- Iteration 3 --
NULL
int(0)
bool(false)
bool(false)
NULL
bool(false)
NULL
int(0)
array(1) {
[0]=>
NULL
}
-- Iteration 4 --
NULL
int(0)
bool(false)
bool(false)
NULL
bool(false)
NULL
int(0)
array(1) {
[0]=>
NULL
}
-- Iteration 5 --
NULL
int(0)
bool(true)
bool(true)
int(1)
NULL
NULL
int(2)
string(0) ""
string(0) ""
int(3)
int(1)
int(1)
int(4)
bool(false)
bool(false)
NULL
bool(false)
NULL
int(0)
array(5) {
[0]=>
NULL
[1]=>
bool(true)
[2]=>
NULL
[3]=>
string(0) ""
[4]=>
int(1)
}
-- Iteration 6 --
string(4) "test"
int(-1)
string(4) "rest"
string(4) "rest"
int(-2)
string(3) "two"
string(3) "two"
int(2)
string(0) ""
string(0) ""
string(0) ""
string(4) "zero"
string(4) "zero"
int(0)
bool(false)
bool(false)
NULL
bool(false)
string(4) "test"
int(-1)
array(5) {
[-1]=>
string(4) "test"
[-2]=>
string(4) "rest"
[2]=>
string(3) "two"
[""]=>
string(0) ""
[0]=>
string(4) "zero"
}
-- Testing variation: when array is unset --
Warning: current(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: key(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: next(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: reset(): Passed variable is not an array or object in %s on line %d
bool(false)
*** Testing error conditions ***
Warning: Wrong parameter count for key() in %s on line %d
NULL
Warning: Wrong parameter count for current() in %s on line %d
NULL
Warning: Wrong parameter count for reset() in %s on line %d
NULL
Warning: Wrong parameter count for next() in %s on line %d
NULL
Warning: Wrong parameter count for key() in %s on line %d
NULL
Warning: Wrong parameter count for current() in %s on line %d
NULL
Warning: Wrong parameter count for reset() in %s on line %d
NULL
Warning: Wrong parameter count for next() in %s on line %d
NULL
Warning: key(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: key(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: key(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: current(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: current(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: current(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: next(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: next(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: next(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: reset(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: reset(): Passed variable is not an array or object in %s on line %d
bool(false)
Warning: reset(): Passed variable is not an array or object in %s on line %d
bool(false)
*** Testing operation on Objects ***
--- Outerloop Iteration 1 ---
Object before performing operations ...
object(test_class)#1 (7) {
["private_var:private"]=>
string(11) "private_var"
["public_var"]=>
string(10) "public_var"
["protected_var:protected"]=>
string(13) "protected_var"
["var1:private"]=>
int(10)
["var2"]=>
int(30)
["var3:protected"]=>
int(40)
["integer"]=>
int(3092)
}
-- Innerloop iteration 1 of Outerloop Iteration 1 --
current => string(11) "private_var"
key => string(23) " test_class private_var"
next => string(10) "public_var"
-- Innerloop iteration 2 of Outerloop Iteration 1 --
current => string(10) "public_var"
key => string(10) "public_var"
next => string(13) "protected_var"
-- Innerloop iteration 3 of Outerloop Iteration 1 --
current => string(13) "protected_var"
key => string(16) " * protected_var"
next => int(10)
-- Innerloop iteration 4 of Outerloop Iteration 1 --
current => int(10)
key => string(16) " test_class var1"
next => int(30)
-- Innerloop iteration 5 of Outerloop Iteration 1 --
current => int(30)
key => string(4) "var2"
next => int(40)
-- Innerloop iteration 6 of Outerloop Iteration 1 --
current => int(40)
key => string(7) " * var3"
next => int(3092)
-- Innerloop iteration 7 of Outerloop Iteration 1 --
current => int(3092)
key => string(7) "integer"
next => bool(false)
reset => string(11) "private_var"
current => string(11) "private_var"
Object after performing operations ...
object(test_class)#1 (7) {
["private_var:private"]=>
string(11) "private_var"
["public_var"]=>
string(10) "public_var"
["protected_var:protected"]=>
string(13) "protected_var"
["var1:private"]=>
int(10)
["var2"]=>
int(30)
["var3:protected"]=>
int(40)
["integer"]=>
int(3092)
}
--- Outerloop Iteration 2 ---
Object before performing operations ...
object(zero_member_var_class)#2 (0) {
}
-- Innerloop iteration 1 of Outerloop Iteration 2 --
current => bool(false)
key => NULL
next => bool(false)
reset => bool(false)
current => bool(false)
Object after performing operations ...
object(zero_member_var_class)#2 (0) {
}
--- Outerloop Iteration 3 ---
Object before performing operations ...
object(zero_member_class)#3 (0) {
}
-- Innerloop iteration 1 of Outerloop Iteration 3 --
current => bool(false)
key => NULL
next => bool(false)
reset => bool(false)
current => bool(false)
Object after performing operations ...
object(zero_member_class)#3 (0) {
}
Done