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, $key); if(in_array($key, $optionKeys)){ $options[$optionKeys[$key]] = $value; } }); print_r($options);
Output for 5.4.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
int(3) string(1) "b" Notice: Undefined index: b in /in/aa1bM on line 14 int(7) string(1) "e" Notice: Undefined index: e in /in/aa1bM on line 14 Array ( [a] => 1 [b] => 2 [c] => 3 [d] => 4 [e] => 5 [] => 7 )
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/aa1bM 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/aa1bM on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/aa1bM on line 3
Process exited with code 255.