用户登陆状态判断，Magento早封装好了： 

   if ($this->helper('customer')->isLoggedIn()) {
      // is logon
   }

判断用户登陆状态是否登陆的原理是：Magento在Session中检查CustomerID是否已经设置，并且该CustomerID在数据库中是有效的。 

   /**
    * Check customer is logged in
    * @class Mage_Customer_Helper_Data
    * @return bool
    */
   public function isLoggedIn()
   {
      return Mage::getSingleton('customer/session')->isLoggedIn();
   }

    /**
     * Checking custommer loggin status
     * @class Mage_Customer_Model_Session
     * @return bool
     */
    public function isLoggedIn()
    {
        return (bool)$this->getId() && (bool)$this->checkCustomerId($this->getId());
    }

相关话题：

  • Magento用户登陆状态
  • 判断Magento用户是否已经登陆
  • Check if user is logged in Magento
  • Magento Customer登陆状态判断