3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ''; echo (isset($a) ? 'true' : 'false') ;
Output for 4.3.0 - 5.3.12, 5.3.14 - 7.2.0
true
Output for 5.3.13

Process exited with code 137.