3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $t = OI; echo "<script>alert(\"$t\");</script>" ;
Output for 7.2.0
Warning: Use of undefined constant OI - assumed 'OI' (this will throw an Error in a future version of PHP) in /in/gmrOo on line 2 <script>alert("OI");</script>
Output for 4.3.0 - 7.1.10
Notice: Use of undefined constant OI - assumed 'OI' in /in/gmrOo on line 2 <script>alert("OI");</script>