3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $defaults = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5]; $optionKeys = array_keys($defaults); $options = $defaults; $args = ['b' => 3, 'e' => 7]; array_walk($args, function($value, $key) use ($optionKeys, &$options){ var_dump($value, $key, $optionKeys, $options); if(in_array($key, $optionKeys)){ $options[$key] = $value; } }); print_r($options);
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
int(3) string(1) "b" array(5) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "d" [4]=> string(1) "e" } array(5) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) ["d"]=> int(4) ["e"]=> int(5) } int(7) string(1) "e" array(5) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "d" [4]=> string(1) "e" } array(5) { ["a"]=> int(1) ["b"]=> int(3) ["c"]=> int(3) ["d"]=> int(4) ["e"]=> int(5) } Array ( [a] => 1 [b] => 3 [c] => 3 [d] => 4 [e] => 7 )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/7IrLI on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/7IrLI on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/7IrLI on line 3
Process exited with code 255.