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<?php abstract class AbstractFoo { protected static $state; public static function setState($state) { static::$state = $state; } public static function getState() { return static::$state; } } class Foo extends AbstractFoo {} class Bar extends AbstractFoo {} $foo = new Foo; $bar = new Bar; AbstractFoo::setState('abstract'); var_dump($bar::getState()); $foo::setState('foo'); var_dump($bar::getState());

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39.01 ms | 402 KiB | 5 Q