run code in 200+ php & hhvm versions
Bugs & Features
<?php function alert($s) { echo "$s\n"; } function isGreaterThan($a,$b) { return intval(($a>$b)); } alert(isGreaterThan(50,6)); alert(isGreaterThan('50','6')); alert(isGreaterThan('70','6'));‚Äč

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).
Note: hhvm uses a JIT which only kicks in after a few runs. Since we run scripts only once, hhvm always runs slower.

VersionSystem time (s)User time (s)Memory (MiB)