3v4l.org

run code in 300+ PHP versions simultaneously
<?php class a { function x() { echo 'x' . chr(10); } } class b extends a { function y() { echo 'y' . chr(10); self::x(); $this->x(); } } class c extends b { function z() { echo 'z' . chr(10); self::y(); } function x() { echo 'x2' . chr(10); } } echo (new c)->z();
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
z y x x2

preferences:
75.1 ms | 406 KiB | 5 Q