3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class B {} class C extends B {} var_export(is_a('C', 'B'));
based on KFNrC
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
false