3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 'b'; $b = 'c'; $c = 'd'; $d = 'e'; $e = 'f'; $f = 'hi'; function hi() { echo 'hello'; } echo $$$$$$$a();
based on 5TJmq
Output for 7.0.0 - 7.2.0
Notice: Undefined variable: hi in /in/F2dJ6 on line 14 Fatal error: Uncaught Error: Function name must be a string in /in/F2dJ6:14 Stack trace: #0 {main} thrown in /in/F2dJ6 on line 14
Process exited with code 255.
Output for 5.3.20 - 5.6.28
Notice: Undefined variable: hi in /in/F2dJ6 on line 14 Fatal error: Function name must be a string in /in/F2dJ6 on line 14
Process exited with code 255.