3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface I1 { public function F1(); public static function FS2(); public static function FS3(); } abstract class C1 implements I1 { public function __construct() { static::F1(); } public static function FS2() { static::FS3(); } } abstract class C2 extends C1 { public function F1() { echo __CLASS__; } public final static function FS3() { echo __CLASS__; } } final class C3 extends C2 { public function __construct() { parent::__construct(); self::FS2(); } public function F1() { echo __CLASS__; } } class C4 extends C2 { } //$_class = new C2(); C4::FS2();
Output for 5.6.38, 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 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
C2

preferences:
185.91 ms | 403 KiB | 175 Q