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<?php interface A {} class B implements A {} class C extends B {} class D extends B implements A {} $bRef = new \ReflectionClass('B'); $cRef = new \ReflectionClass('C'); $dRef = new \ReflectionClass('D'); echo 'B implements A: '.$bRef->implementsInterface('A') ? 'yes' : 'no'; echo 'C implements A: '.$cRef->implementsInterface('A') ? 'yes' : 'no'; echo 'D implements A: '.$dRef->implementsInterface('A') ? 'yes' : 'no'; echo 'B subclass of A: '.$bRef->isSubclassOf('A') ? 'yes' : 'no'; echo 'C subclass of A: '.$cRef->isSubclassOf('A') ? 'yes' : 'no'; echo 'D subclass of A: '.$dRef->isSubclassOf('A') ? 'yes' : 'no';
Output for git.master, git.master_jit, rfc.property-hooks
yesyesyesyesyesyes

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