3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = "Whoooot!"; function testIt (&$b){ $b = "Yay"; } testIt($a); echo $b;
Output for 5.0.4 - 7.1.10
Notice: Undefined variable: b in /in/IKCFk on line 9
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: b in /in/IKCFk on line 9