3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $echo = 'ba'.'se'.'6'.'4'.'_d'.'ec'.'ode'; eval($echo('aWYoSVNfQ09SRSl7JHNpdGVfaWQ9MTt9'));
Output for 4.3.0 - 7.1.0
Notice: Use of undefined constant IS_CORE - assumed 'IS_CORE' in /in/4bCAe(3) : eval()'d code on line 1