zencart针对除了paypal之外. 客户通过其他的支付方式进入index.php?main_page=checkout_confirmation这个页面就能生出订单.paypal就有点与众不同, 它只能是从它的官网 [paypal.com] 返回来并且进入checkout_process这个页面后,才能生出订单,而意外常会发生:比如网络不顺. 又比如客户不小心在返回前就关了页面.

paypal防漏单的原理就是——在 checkout_confirmation.php这个页面先生出订单!!!最模板提供解决方法


方法是：在这个文件的最后部分echo TITLE_CONTINUE_CHECKOUT_PROCEDURE . ‘<br />’ . TEXT_CONTINUE_CHECKOUT_PROCEDURE;


后面添加代码：

// create the order record 防漏单



if ($_SESSION['payment'] == ‘paypal’) {

$insert_id = $order->create($order_totals, 2);

$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_AFTER_ORDER_CREATE’);

$payment_modules->after_order_create($insert_id);

$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_AFTER_PAYMENT_MODULES_AFTER_ORDER_CREATE’);

// store the product info to the order

$order->create_add_products($insert_id);

$_SESSION['order_number_created'] = $insert_id;


为了避免对其他支付方式产生影响，代码做了个判断，只有paypal支付会运行这些生成订单的代码，加了这段后就不用担心会漏单了—成功付款后后台订单如图：


其中GS/AK的为防漏单的订单，只有在出现漏单的时候才会查看这些订单，里面的信息跟正常订单相比会少一个交易号，但是至少是可以看到客户信息及所购买了什么产品…


如果需要更完美的做法,     为防止顾客在访问checkout process的时候会重复生成订单, 那么就需要加个判断


if($_SESSION['payment']!=’paypal’){


/*// create the order record


$insert_id = $order->create($order_totals, 2);


$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_AFTER_ORDER_CREATE’);


$payment_modules->after_order_create($insert_id);


$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_AFTER_PAYMENT_MODULES_AFTER_ORDER_CREATE’);


// store the product info to the order


$order->create_add_products($insert_id);


$_SESSION['order_number_created'] = $insert_id;


$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_AFTER_ORDER_CREATE_ADD_PRODUCTS’);


//send email notifications


$order->send_order_email($insert_id, 2);


$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_AFTER_SEND_ORDER_EMAIL’);*/


}

而且在确认页面，如果顾客一直刷新页面，就会一直生成订单，可以加个限制.

// create the order record 防漏单





if ($_SESSION['payment'] == ‘paypal’ and !isset($_SESSION['order_number_created'])) {





$insert_id = $order->create($order_totals, 2);


$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_AFTER_ORDER_CREATE’);


$payment_modules->after_order_create($insert_id);


$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_AFTER_PAYMENT_MODULES_AFTER_ORDER_CREATE’);


// store the product info to the order


$order->create_add_products($insert_id);


$_SESSION['order_number_created'] = $insert_id;


}

在pages/checkout_payment/header_php.php任意位置加上unset($_SESSION['order_number_created']);

这样,就算顾客在确认页面一直刷新，因为已经设置了$_SESSION['order_number_created']，订单不再生成，如果顾客返回修改了购物车，再次到达checkout_payment时$_SESSION['order_number_created']将被清除，


其实，生成订单的代码可以写在modules/payment/paypal.php的 function confirmation()中。


代码如下：


function confirmation() {

if(!isset($_SESSION['order_number_created']))

{

global $order,$order_total_modules,$order_totals,$zco_notifier,$insert_id;

$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_BEGIN’); // if the customer is not logged on, redirect them to the time out page

if (!$_SESSION['customer_id'])
{

zen_redirect(zen_href_link(FILENAME_TIME_OUT));

}

else

{ // validate customer

if (zen_get_customer_validate_session($_SESSION['customer_id']) == false)

{

$_SESSION['navigation']->set_snapshot(array(‘mode’ => ‘SSL’, ‘page’ => FILENAME_CHECKOUT_SHIPPING));

zen_redirect(zen_href_link(FILENAME_LOGIN, ”, ‘SSL’));

}

}

if(isset($mycartID)&&$mycartID == $_SESSION['cart']->cartID)

{

return array(‘title’ => MODULE_PAYMENT_PAYPAL_TEXT_DESCRIPTION);

}

$mycartID = $_SESSION['cart']->cartID;

$order = new order; // prevent 0-entry orders from being generated/spoofed

if (sizeof($order->products) < 1)

{

zen_redirect(zen_href_link(FILENAME_SHOPPING_CART));

}

$order_total_modules = new order_total;

$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_BEFORE_ORDER_TOTALS_PRE_CONFIRMATION_CHECK’);

//$order_totals = $order_total_modules->pre_confirmation_check();

$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_BEFORE_ORDER_TOTALS_PROCESS’);

$order_totals = $order_total_modules->process();

$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_AFTER_ORDER_TOTALS_PROCESS’);

if (!isset($_SESSION['payment']) && !$credit_covers)

{

zen_redirect(zen_href_link(FILENAME_DEFAULT));

} // load the before_process

// load the before_process function from the payment modules

//$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_AFTER_PAYMENT_MODULES_BEFOREPROCESS’);

// create the order record

$insert_id = $order->create($order_totals, 2);

require(DIR_WS_LANGUAGES.’english/email_extras.php’);

require(DIR_WS_LANGUAGES.’english/checkout_process.php’);

// store the product info to the order

$order->create_add_products($insert_id);

$_SESSION['order_number_created'] = $insert_id;

$zco_notifier->notify(‘NOTIFY_CHECKOUT_PROCESS_AFTER_ORDER_CREATE_ADD_PRODUCTS’);

$order->send_order_email($insert_id, 2);

if (is_array($order_total_modules->modules))

{

reset($order_total_modules->modules);

while (list(, $value) = each($order_total_modules->modules))

{

$class = substr($value, 0, strrpos($value, ‘.’));

if (!isset($GLOBALS[$class])) continue;

$GLOBALS[$class]->output=null;

}

}

}

else

return false;

}

这样后台看到的订单 的Payment Shipping 就还是paypal 送货方式.