3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php error_reporting(0); $a; function incr(){ return $a++; // $a is undefined } echo incr();
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0