PHP WC_Shipping::$_instance示例

示例#1

文件： class-wc-shipping.php 项目： CannedHead/feelingsurf

 /**
  * Main WC_Shipping Instance
  *
  * Ensures only one instance of WC_Shipping is loaded or can be loaded.
  *
  * @since 2.1
  * @static
  * @return WC_Shipping Main instance
  */
 public static function instance()
 {
     if (is_null(self::$_instance)) {
         self::$_instance = new self();
     }
     return self::$_instance;
 }