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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 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
bool(true) bool(true) bool(true)
preferences:
109.07 ms | 1236 KiB | 4 Q