3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo "TEST: " . $foo . " ...";
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: foo in /in/VdoZN on line 2 TEST: ...
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: foo in /in/VdoZN on line 2 TEST: ...