据我所知，除非需要，否则不会实例化XML RPC类，这是在请求/xmlrpc.php.

您将以与Core相同的方式实例化该类：

include_once(ABSPATH . \'wp-admin/includes/admin.php\');
include_once(ABSPATH . WPINC . \'/class-IXR.php\');
include_once(ABSPATH . WPINC . \'/class-wp-xmlrpc-server.php\');

/**
  * Posts submitted via the XML-RPC interface get that title
  * @name post_default_title
  * @var string
  */
$post_default_title = "";

/**
  * Filter the class used for handling XML-RPC requests.
  *
  * @since 3.1.0
  * @param string The name of the XML-RPC server class.
  */
$wp_xmlrpc_server_class = apply_filters( \'wp_xmlrpc_server_class\', \'wp_xmlrpc_server\' );
$wp_xmlrpc_server = new $wp_xmlrpc_server_class;

在类中创建一个方法来实例化XML RPC类，并将实例保存到类变量中dependency injection“，这既有优点也有缺点。