3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php ini_set('error_reporting', -1); ini_set('display_errors', 'on'); function generator(){ if(empty($a)){ return null; } yield 1; } foreach(generator() as $i) { echo $i; }
based on QsQoF
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0