3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class Bar {}; class Bla {}; class Foo extends Bla {}; $foo = new Foo(); var_dump(is_subclass_of($foo, 'Bar'));
based on GbShr
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
bool(false)