3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo "1 $foo[nonexisting] 2", "3 " . $foo['nonexisting'] . " 4";
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: foo in /in/VR96K on line 3 1 2 Notice: Undefined variable: foo in /in/VR96K on line 3 3 4
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: foo in /in/VR96K on line 3 1 2 Notice: Undefined variable: foo in /in/VR96K on line 3 3 4