3v4l.org

run code in 300+ PHP versions simultaneously
<?php array_walk($a = [1,2,3], function($arr, $key) { echo $arr[$key]; })
Output for 5.4.0 - 5.4.30
Parse error: syntax error, unexpected end of file in /in/qd3GC on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/qd3GC on line 4
Process exited with code 255.
preferences:
178.91 ms | 1395 KiB | 67 Q