3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo $_GET['foo'];
Output for 5.3.0 - 7.2.0
Notice: Undefined index: foo in /in/q56YY on line 2
Output for 4.3.0 - 5.2.17
Notice: Undefined index: foo in /in/q56YY on line 2