3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo $x;
Output for 5.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.1.10
Notice: Undefined variable: x in /in/8cFI2 on line 3