3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $str .= 'test'; echo $str;
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: str in /in/G1Qbr on line 2 test
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: str in /in/G1Qbr on line 2 test