3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = "Foo"; $b = "Bar"; function testIt (&$b){ $b = "Yay!"; } testIt($a); testIt($b); print "$a\n"; print "$b\n";
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Yay! Yay!
Output for hhvm-3.10.0

Process exited with code 153.