3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface A { public function foo(string $a); } class B implements A { public function foo($a) {} }
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Output for 7.1.25 - 7.1.33
Fatal error: Declaration of B::foo($a) must be compatible with A::foo(string $a) in /in/pVHZO on line 7
Process exited with code 255.
preferences:
114.3 ms | 407 KiB | 5 Q