3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = (function () { return 'b'; })(); echo $a;
based on MRQWh
Output for hhvm-3.15.4, 7.0.0 - 7.2.6
b
Output for 5.6.0 - 5.6.30
Parse error: syntax error, unexpected '(' in /in/BgHvH on line 3
Process exited with code 255.