3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { const C = self::C; function c() { echo static::C; } } class B extends A { const C = 'PHP'; } (new B)->c();
Output for 7.0.0 - 7.0.25, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
PHP
preferences:
80.56 ms | 1539 KiB | 4 Q