3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface i{} class a implements i{} var_dump(a::class instanceof i); // false var_dump(in_array(i::class, class_implements(a::class), true)); // true
Output for 7.3.0 - 7.3.30, 7.4.0 - 7.4.23, 8.0.0 - 8.0.11, 8.1rc1 - rc2
bool(false) bool(true)

preferences:
65.64 ms | 459 KiB | 5 Q