3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php for ($x = 1; $x == 10; $x++) { $z = str_replace("a", "@", "franz"); } echo $z;
Output for 5.0.4 - 7.1.0
Notice: Undefined variable: z in /in/k0NQX on line 6
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: z in /in/k0NQX on line 6