3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class foo { static $bar; } foo::$bar = function () { echo "Hello World"; }; foo::$bar();
based on vKumU
Output for 7.0.0 - 7.2.0
Notice: Undefined variable: bar in /in/a4EKT on line 4 Fatal error: Uncaught Error: Function name must be a string in /in/a4EKT:4 Stack trace: #0 {main} thrown in /in/a4EKT on line 4
Process exited with code 255.
Output for 5.3.19 - 5.6.28
Notice: Undefined variable: bar in /in/a4EKT on line 4 Fatal error: Function name must be a string in /in/a4EKT on line 4
Process exited with code 255.