3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function array_map_key(Callable $callback, $array) { $return = array(); foreach ($array as $key => $value) { list($k,$v) = $callback($key, $value); $return[$k] = $v; } return $return; } function my_call_back($key, $value) { return array($value, strlen($value)); } $array = explode(" ", "PHP stands for PHP hypertext preprocessor"); $array = array_map_key('my_call_back', $array); var_dump($array);
Output for 5.4.0 - 7.1.0
array(5) { ["PHP"]=> int(3) ["stands"]=> int(6) ["for"]=> int(3) ["hypertext"]=> int(9) ["preprocessor"]=> int(12) }
Output for 5.2.0 - 5.3.29
Catchable fatal error: Argument 1 passed to array_map_key() must be an instance of Callable, string given, called in /in/JT1nW on line 19 and defined in /in/JT1nW on line 2
Process exited with code 255.
Output for 5.1.0 - 5.1.6
Fatal error: Argument 1 passed to array_map_key() must be an object of class Callable, called in /in/JT1nW on line 19 and defined in /in/JT1nW on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Fatal error: Argument 1 must be an object of class Callable in /in/JT1nW on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/JT1nW on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting ')' in /in/JT1nW on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/JT1nW on line 2
Process exited with code 255.