3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php define('ABC','dre'); define(ABC, 5); echo get_defined_constants(); echo dre;
Output for 5.5.0 - 7.2.0
Notice: Array to string conversion in /in/2YGEG on line 8 Array5
Output for 4.3.0 - 5.4.45
Array5