run code in 200+ php & hhvm versions
Bugs & Features
<?php set_error_handler(function($t,$m){echo $m;}); set_error_handler('var_dump', 0); restore_error_handler(); $a = $b;

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

Output for Array change keys
Undefined variable: b
Output for Lexical anon
Undefined variable: b
Output for Typed properties
Undefined variable: b

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