Online PHP editor | refs for 4Bn0L

<?php class A { public static $bar = []; public static function foo($x) { static::$bar[] = $x; return static::$bar; } } class B extends A { public static function resetFoo() { static::$bar = []; } } print_r(A::foo(1)); print_r(A::foo(2)); B::resetFoo(); print_r(A::foo(3));