3v4l.org

run code in 300+ PHP versions simultaneously
<?php //$mystring = null; if (empty($mystring)) { echo "empty\n"; } if ($mystring == null) { echo "null\n"; // and warning } if (!isset($mystring)) { echo "unset\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
empty Warning: Undefined variable $mystring in /in/E2l88 on line 7 null unset

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

preferences:
54.15 ms | 401 KiB | 8 Q