3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $test='12345'; echo substr($string,-1,2);
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: string in /in/58nvj on line 3
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: string in /in/58nvj on line 3