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run code in 200+ php & hhvm versions
Bugs & Features
<?php $arr = array('_error' => true); if ($arr AND $arr[_error]) print 'error';
Output for 7.2.0
Warning: Use of undefined constant _error - assumed '_error' (this will throw an Error in a future version of PHP) in /in/q42tW on line 5 error
Output for 4.3.0 - 7.1.7
Notice: Use of undefined constant _error - assumed '_error' in /in/q42tW on line 5 error