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"