3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $price = 100; echo "${$price}.99";
Output for 5.0.4 - 7.1.0
Notice: Undefined variable: 100 in /in/nn5WA on line 5 .99
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: 100 in /in/nn5WA on line 5 .99