在做天下牧场项目时，对QQ快速登入的用户进行用户绑定功能，其中要绑定牧场用户时首先要验证邮箱是否纯在，再验证用户密码是否正确：
1，验证邮箱是否纯在：
private function _checkEmailByQq($email)
{
if (preg_match('/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/', $email) !== 1) {
return false;
}
/* @var $customerModel Mage_Customer_Model_Customer */
$customerModel = Mage::getModel('customer/customer');
$customerModel->setData('website_id', Mage::app()->getWebsite()->getId());
$customerModel->loadByEmail($email);
return $customerModel->getId();
}
2，验证密码是否正确：
$websiteId = Mage::app()->getStore()->getWebsiteId();
try {
$login_customer_result = Mage::getModel('customer/customer')->setWebsiteId($websiteId)->authenticate($email, $password);
$validate = 1;
}
catch(Exception $ex) {
$validate = 0;
}
其中如果$validate = 1
则密码验证正确
