3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { const A = 'Foo::A'; const B = self::A . ' and ' . self::C; const C = 'Foo::C'; } class Bar extends Foo { const A = 'Bar::A'; const C = 'Bar::C'; } var_dump(Bar::B);
Output for 7.1.4 - 7.1.33, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
string(17) "Foo::A and Foo::C"
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.3
string(17) "Foo::A and Bar::C"
Output for 5.6.0 - 5.6.40
string(17) "Bar::A and Bar::C"
preferences:
137.35 ms | 408 KiB | 5 Q