3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class AA{}; class CC{}; class BB extends AA{}; var_dump(is_subclass_of('BB', 'aa'));
based on lJ1S6
Output for 5.0.3 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(true)
Output for 4.3.0 - 5.0.2
bool(false)