php 获取静态方法调用的类名

方法一:
class foo {
    static public function test() {
        var_dump(get_called_class());
    }
}

class bar extends foo {
}

foo::test();
bar::test();

输出:
    
    string(3) "foo"
    string(3) "bar"

方法二:
class Bar {
    public static function test() {
        var_dump(static::class);
    }
}

class Foo extends Bar {

}

Foo::test();
Bar::test();

Output:

 string(3) "Foo"
 string(3) "Bar"