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run code in 200+ php & hhvm versions
Bugs & Features
<?php class Foo {} class Bar extends Foo {} var_dump(is_subclass_of(Bar::class, Foo::class)); var_dump(is_a(Foo::class, Foo::class)); var_dump(is_a(Foo::class, Bar::class));
based on W50lG
Output for 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.30 - 7.3.0alpha1
bool(true) bool(false) bool(false)