3v4l.org

run code in 500+ PHP versions simultaneously
<?php class A { public function foo(int $foo=42) {} } class B extends A { public function foo(int $foo=101) {} } class C extends A { public function foo(int $foo) {} }
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.10
Fatal error: Declaration of C::foo(int $foo) must be compatible with A::foo(int $foo = 42) in /in/SEsRm on line 12
preferences:
28.39 ms | 1136 KiB | 6 Q