3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { protected $foo; private function foo() { $this->foo = 'A-foo'; } public function bar() { $this->foo(); return $this->foo; } } class B extends A { private function foo() { $this->foo = 'B-foo'; } } echo (new B())->bar();
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
A-foo

preferences:
150.91 ms | 480 KiB | 5 Q