run code in 200+ php & hhvm versions
Bugs & Features
<?php class foo { } $f = new foo(); $x = new $f; echo instanceof($f); echo instanceof($x);

Shows result from various feature-branches currently under review from the php developers. Contact me to have additional branches featured.

Output for Arrow functions
Parse error: syntax error, unexpected 'instanceof' (T_INSTANCEOF) in /in/72rSA on line 11

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