3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = ""; if(empty($a) && isset($a['hello'])) print 'Empty';
Output for 4.3.3 - 7.1.0
Output for 4.3.0 - 4.3.2
Notice: Uninitialized string offset: 0 in /in/hWe9a on line 3