key_variation2.phpt [plain text]
--TEST--
Test key() function : usage variations
--FILE--
<?php
echo "*** Testing key() : usage variations ***\n";
$unset_var = 10;
unset ($unset_var);
$heredoc = <<<EOT
hello world
EOT;
$inputs = array(
'int' => array(
0 => 'zero',
1 => 'one',
12345 => 'positive',
-2345 => 'negative',
),
'float' => array(
10.5 => 'positive',
-10.5 => 'negative',
.5 => 'half',
),
'extreme floats' => array(
12.3456789000e6 => 'large',
12.3456789000E-10 => 'small',
),
'null uppercase' => array(
NULL => 'null 1',
),
'null lowercase' => array(
null => 'null 2',
),
'bool lowercase' => array(
true => 'lowert',
false => 'lowerf',
),
'bool uppercase' => array(
TRUE => 'uppert',
FALSE => 'upperf',
),
'empty double quotes' => array(
"" => 'emptyd',
),
'empty single quotes' => array(
'' => 'emptys',
),
'string' => array(
"stringd" => 'stringd',
'strings' => 'strings',
$heredoc => 'stringh',
),
'undefined' => array(
@$undefined_var => 'undefined',
),
'unset' => array(
@$unset_var => 'unset',
),
);
$iterator = 1;
foreach($inputs as $key => $input) {
echo "\n-- Iteration $iterator : $key data --\n";
while (key($input) !== NULL) {
var_dump(key($input));
next($input);
}
$iterator++;
};
?>
===DONE===
--EXPECTF--
*** Testing key() : usage variations ***
-- Iteration 1 : int data --
int(0)
int(1)
int(12345)
int(-2345)
-- Iteration 2 : float data --
int(10)
int(-10)
int(0)
-- Iteration 3 : extreme floats data --
int(12345678)
int(0)
-- Iteration 4 : null uppercase data --
string(0) ""
-- Iteration 5 : null lowercase data --
string(0) ""
-- Iteration 6 : bool lowercase data --
int(1)
int(0)
-- Iteration 7 : bool uppercase data --
int(1)
int(0)
-- Iteration 8 : empty double quotes data --
string(0) ""
-- Iteration 9 : empty single quotes data --
string(0) ""
-- Iteration 10 : string data --
string(7) "stringd"
string(7) "strings"
string(11) "hello world"
-- Iteration 11 : undefined data --
string(0) ""
-- Iteration 12 : unset data --
string(0) ""
===DONE===