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 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
bool(false) bool(true)

preferences:
132.46 ms | 403 KiB | 157 Q