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run code in 200+ php & hhvm versions
Bugs & Features
<?php class A { } class B extends A { } $a = new B(); var_dump(is_subclass_of($a, 'B'));
Output for 4.3.0 - 5.6.38, hhvm-3.10.1 - 3.22.0, 7.0.0 - 7.2.12
bool(false)