3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $class = "Gtt\Test\ystd\Gdsd[][]"; echo substr(strpos($class, "["));
based on iMfki
Output for 5.3.0 - 7.2.0
Warning: substr() expects at least 2 parameters, 1 given in /in/YQbth on line 5
Output for 4.3.0 - 5.2.17
Warning: Wrong parameter count for substr() in /in/YQbth on line 5