php - 在函数php中访问类内的公共(public)静态变量

Question

我正在尝试访问函数中的类中的变量:

class google_api_v3 {

  public static $api_key = 'this is a string';

  function send_response() {
     // access here $api_key, I tried with $this->api_key, but that works only on private and that variable I need also to access it outside the class that is why I need it public.
  }

}

function outside_class() {
  $object = new google_api_v3;
  // works accessing it with $object::api_key
}

Answer 1

使用值/方法(包括静态方法)的通用方式里面 类(class)是self::

echo self::$api_key;