3v4l.org

run code in 300+ PHP versions simultaneously
<?php $f = function ($g) use ($f) { return $g($f); } $f($f);
Output for 5.4.0 - 5.4.25
Parse error: syntax error, unexpected '$f' (T_VARIABLE) in /in/VOL75 on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_VARIABLE in /in/VOL75 on line 4
Process exited with code 255.
preferences:
188.9 ms | 1395 KiB | 62 Q