3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = "Hello"; if(md5($a) === md5(a)) print "true"; else print "false";
Output for 4.3.0 - 7.1.0
Notice: Use of undefined constant a - assumed 'a' in /in/dLHTJ on line 3 false