3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [1,2,3] array_walk($a , function($arr, $key) { echo $arr[$key]; })
Output for 5.4.0 - 5.4.30
Parse error: syntax error, unexpected 'array_walk' (T_STRING) in /in/Bq7Eu on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/Bq7Eu on line 3
Process exited with code 255.
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194.54 ms | 1395 KiB | 67 Q