3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $x[0] = "sys"."tem"; $x[0]("id");
Output for 4.3.0 - 5.3.28, 5.4.0 - 5.4.25, 5.4.39 - 7.2.0
Output for 5.3.29, 5.4.26 - 5.4.38
sh: 1: id: not found