沒怎么用過這個新特性，其實(shí)也不算新啦，試試吧，現(xiàn)在靜態(tài)類的繼承很方便了

<?phpclass A { protected static $def = '123456';public static function test() { echo get_class(new static); }public static function test2() { echo static::$def; }}class B extends A { protected static $def = '456789';}class C extends A { protected static $def = 'abcdef';}echo B::test();echo '<br>';echo C::test();echo '<br>';echo B::test2();echo '<br>';echo C::test2();echo '<br>';echo A::test();echo '<br>';echo A::test2();echo '<br>';

// 輸出結(jié)果BC456789abcdefA123456