3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $string = "On first glance, the following appears to output 'true' "; print_r(substr($string, "true"));
based on rbnnW
Output for 7.0.0 - 7.2.0
Warning: substr() expects parameter 2 to be integer, string given in /in/JQ10v on line 5
Output for 5.3.19 - 5.6.28
Warning: substr() expects parameter 2 to be long, string given in /in/JQ10v on line 5