3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { protected function test() {} } class B extends A { public function test2($x) { $x->test(); // Uncaught Error: Call to protected method D::test() from context 'B' } } class C extends A { protected function test() {} } class D extends C { protected function test() { echo "Hello World!\n"; } } (new B)->test2(new D);
Output for 7.1.25 - 7.1.27, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Hello World!

preferences:
145.53 ms | 403 KiB | 156 Q