if(!Mage::getSingleton(“customer/session”)->isLoggedIn())  {
// 客户没有登录，这里输入处理流程.
}

if(!Mage::getSingleton(“customer/session”)->isLoggedIn())
{
$session = Mage::getSingleton(“customer/session”);
// Store The Current Page Url Where User will be redirected once loggedin
$session->setBeforeAuthUrl(Mage::helper(“core/url”)->getCurrentUrl());
$customerLoginURL = $this->getBaseUrl() . “customer/account/login”;
Mage::app()->getFrontController()->getResponse()->setRedirect($customerLoginURL)->sendResponse();
}

setBeforeAuthUrl(Mage::helper(“core/url”)->getCurrentUrl());

$customer = Mage::getSingleton(‘customer/session’)->getCustomer();