WordPress：自定义WP REST API (WP API)授权

/** 
 * Check the authentication headers if supplied 
 * 
 * @return WP_Error|null WP_Error indicates unsuccessful login, null indicates successful or no authentication provided 
 */ 
public function check_authentication() { 
    /** 
     * Pass an authentication error to the API 
     * 
     * This is used to pass a {@see WP_Error} from an authentication method 
     * back to the API. 
     * 
     * Authentication methods should check first if they're being used, as 
     * multiple authentication methods can be enabled on a site (cookies, 
     * HTTP basic auth, OAuth). If the authentication method hooked in is 
     * not actually being attempted, null should be returned to indicate 
     * another authentication method should check instead. Similarly, 
     * callbacks should ensure the value is `null` before checking for 
     * errors. 
     * 
     * A {@see WP_Error} instance can be returned if an error occurs, and 
     * this should match the format used by API methods internally (that is, 
     * the `status` data should be used). A callback can return `true` to 
     * indicate that the authentication method was used, and it succeeded. 
     * 
     * @param WP_Error|null|boolean WP_Error if authentication error, null if authentication method wasn't used, true if authentication succeeded 
     */ 
    return apply_filters( 'json_authentication_errors', null ); 
}

/** 
* WP JSON API 认证检查 
* @param  null 
* @return boolean     是否认证成功 
* @author suifengtec  coolwp.com 
*/ 
function coolwp_rest_api_auth_check( $result ){ 

   if( 
        !isset($_GET['id']) 
       // ||!isset($_GET['app_key']) 
        ||!isset($_GET['app_token']) 
        ||empty($_GET['id']) 
       // ||empty($_GET['app_key']) 
        ||empty($_GET['app_token']) 


    ){ 
         return false; 
    } 

    //获取从应用GET过来的用户id、app_key和app_token,当然了，你也可以只用一个去app_key和app_token中的任何一个去检查 
    $user_id =  (int)$_GET['id']; 
   // $app_key = sanitize_text_field($_GET['app_key']); 
    $app_token = sanitize_text_field($_GET['app_token']); 

    //查询app_key和app_token,当然了,你也可以自定义一种算法, 
    //$wp_key = get_user_meta( $user_id, 'app_key', true); 
    $wp_token = get_user_meta( $user_id, 'app_token', true); 


    //将从应用客户端获取到的值与数据库存储的值进行对比 
    if( 
        ( $wp_token == $app_token ) 
       // &&( $wp_key == $app_key ) 

    ){ 

       return true; 
    } 

    return false; 

} 
add_filter('json_authentication_errors', 'coolwp_rest_api_auth_check');