3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $str = 'aaaaaa'; var_dump( isset($str['check'][0]) );
Output for 4.3.0 - 5.3.29, 7.0.0 - 7.3.0rc4
bool(false)
Output for 5.4.0 - 5.6.21
bool(true)