3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $isnotset = null; echo substr($isnotset, 0, 255);
Output for 4.3.0 - 5.6.25, hhvm-3.10.0, 7.0.0 - 7.1.0
Output for hhvm-3.12.0 - 3.13.2
Warning: substr() expects parameter 1 to be string, null given in /in/jDqb1 on line 3