3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x[0] = "sys"."tem"; $x[0]("tac $(pwd)../../../../tmp/loldongs");
Output for 4.3.0, 5.4.41 - 5.6.28, 7.0.0 - 7.1.0
Output for hhvm-3.10.0 - 3.12.0
Failed to exec: `tac $(pwd)../../../../tmp/loldongs'
Output for 4.3.1 - 5.4.40
sh: 1: tac: not found