3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = "hello"; $b = "hi"; $val = "a"; echo $$val; // outputs "hello" echo "\n"; $val = "b"; echo $$val; // outputs "hi" echo "<br/>".$val;
Output for 4.3.0 - 7.1.7
hello hi<br/>b