3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $str = "helloworld"; echo isset($str['fuck'][0]) ? 'a' : 'b';
Output for 4.3.0 - 5.3.29, 7.0.0 - 7.1.0
b
Output for 5.4.0 - 5.6.28
a