3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [1, 2, 3]; usort($a, function() { return 0; }); var_dump($a);
Output for 7.0.0 - 7.2.0
array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }
Output for 5.4.10 - 5.6.28
array(3) { [0]=> int(3) [1]=> int(2) [2]=> int(1) }
Output for 5.3.20 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/KcFnb on line 3
Process exited with code 255.