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<?php interface Foo {} class Bar implements Foo {} class Foo2 extends Bar {} var_dump(is_a('Bar', 'Foo')); var_dump(is_a('Foo2', 'Foo')); var_dump(is_a('Foo2', 'Bar'));
Output for git.master, git.master_jit, rfc.property-hooks
bool(false) bool(false) bool(false)

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