3v4l.org

run code in 300+ PHP versions simultaneously
<?php class X { function foo() { echo 'X::foo()'; } function bar() { $this->foo(); } } class Y extends X { function foo() { echo 'Y::foo()'; } } $x = new Y(); $x->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 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Y::foo()
preferences:
245.98 ms | 404 KiB | 302 Q