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<?php interface Iface {} class Child {} class Parentt extends Child implements Iface { } $a = new Parentt(); var_dump(is_a($a, Iface::class, true)); var_dump(is_a($a, Child::class, true)); var_dump(is_a($a, Parentt::class, true));
Output for rfc.property-hooks, git.master, git.master_jit
bool(true) bool(true) bool(true)

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