3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = array('_error' => 'fafasfasfasf'); if ($arr AND $arr[_error]) print 'error';
Output for 4.3.0 - 7.1.0
Notice: Use of undefined constant _error - assumed '_error' in /in/jVpKa on line 5 error