3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $matt = "cool"; $cool = "dev"; echo ${$matt};
based on R55AT
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.22.0, 7.0.0 - 7.2.2
dev