3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $arr = array(); $arr['key']; echo (count($arr));
Output for 5.3.0 - 7.1.7
Notice: Undefined index: key in /in/TsRvg on line 3 0
Output for 4.3.0 - 5.2.17
Notice: Undefined index: key in /in/TsRvg on line 3 0