3v4l.org

run code in 500+ PHP versions simultaneously
<?php class B { private $x = 'x'; function foo() { return $this->x; } } class C extends B { private $x = 'y'; function foo() { return $this->x . parent::foo(); } } $c = new C; var_export($c->foo());
Output for 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 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
'yx'

preferences:
28.48 ms | 1137 KiB | 7 Q