3v4l.org

run code in 300+ PHP versions simultaneously
<?php abstract class A { public function foo() { // $this refers to $b/B regardless of the fact that the code is in A::foo $this->bar(); } public function bar() { echo "A's bar"; } } class B extends A { public function foo() { parent::foo(); } public function bar() { echo "B's bar"; } } $b = new B(); $b->foo();
Output for 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
B's bar

preferences:
149.45 ms | 402 KiB | 152 Q