3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php ${''}=10; echo ${''}.PHP_EOL; echo ${null}.PHP_EOL; echo ${"\0"}.PHP_EOL;
Output for 5.6.30, 7.0.0 - 7.2.9
10 10 Notice: Undefined variable: in /in/QbHG4 on line 7
Output for hhvm-3.15.4 - 3.22.0

Process exited with code 139.