3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = ['a'=>1,'b'=>2,'c'=>3]; $b = ['a'=>'aa','b'=>'bb']; var_dump(array_combine( array_map( function($key) use ($b) { return isset($b[$key]) ? $b[$key] : $key }, array_keys($a) ), array_values($a) ));
Output for 5.4.0 - 5.4.29
Parse error: syntax error, unexpected '}' in /in/vJ9hk on line 9
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/vJ9hk on line 3
Process exited with code 255.