3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { const A = "fooa"; const B = self::A . self::C; const C = "fooc"; } class Bar extends Foo { const A = "bara"; const C = "barc"; } var_dump(Bar::B);

preferences:
88.67 ms | 1431 KiB | 5 Q