3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = [100,200,300, 400]; $d = 555; while($r = array_pop($a) >=0){} $a[]= abs($r); var_dump($a);
Output for 5.4.0 - 5.4.30

Process exited with code 137.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/IW14u on line 2
Process exited with code 255.