3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public function __toString() { return '-'; } } class B {public function __toString() { return '-'; } } class C {public function __toString() { return '-'; } } $c = new C; var_dump(array_unique([$c, new A, new B, $c, new A]));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(1) { [0]=> object(C)#1 (0) { } }
preferences:
133.01 ms | 402 KiB | 121 Q