3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $rest = "test"; $test = 123; $$rest.= '1'; echo $test;
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
1231
Output for hhvm-3.10.0

Process exited with code 153.