PHP는 주문 누락을 방지하기 위해 zen-cart 주문 및 결제 프로세스를 수정합니다.

zen-cart를 사용해 본 사람이라면 누구나 zen-cart의 주문 단계가 다음과 같다는 것을 알고 있을 것입니다([] 안의 표현은 필요하지 않습니다).

1. 장바구니

2. [배송방법]

3. 결제방법

4. 주문확인(확인)

5. [제3자 홈페이지 결제]

6. 주문 처리(결제 프로세스) - 장바구니에 있는 정보가 여기에 주문에 기록되므로 이 단계가 더 중요합니다.

7. 주문 성공(결제 성공)

일반적인 상황에서는 이 과정에 아무런 문제가 없습니다. 다만, 5단계부터 6단계까지의 과정에서 사용자는 결제가 성공했다고 생각하고 바로 웹페이지를 닫거나, 네트워크상의 문제로 인해 checkout_process 페이지로 정상적으로 점프하지 못하는 경우가 발생할 수 있습니다. 이는 주문이 정상적으로 생성될 수 없기 때문에 매우 심각한 문제입니다.

위의 분석을 바탕으로 프로세스를 약간 변경하여 결제 전에 주문이 생성되었으므로 결제 도중에 제3자 결제 웹사이트에서 다시 이동할 수 없더라도 사용자가 성공적으로 결제했지만 백그라운드에서 주문이 없는 상황이 있을 수 있습니다. 수정된 도면은 기본적으로 다음과 같습니다.

1. checkour_confirmation 페이지에서 주문 확인 후 직접 처리하여 checkour_success 페이지로 들어가시면 결제 페이지로 진입하실 수 있습니다. 아래 그림과 같습니다.

2. 고객이 해당 시점에 결제에 실패한 경우 자신의 백엔드에 들어가 과거 주문에 대한 결제도 가능합니다. 아래 그림과 같이

위의 기능을 단계별로 구현하는 방법을 살펴보겠습니다.

1. 먼저 기존 결제 모듈을 혁신해야 합니다. 결제를 위한 페이지 URL을 나타내기 위해 결제 방법 클래스에 paynow_action_url 필드를 추가해야 합니다. 또한 결제 양식의 숨겨진 필드 코드 매개변수를 가져오려면 paynow_button($order_id) 함수를 추가해야 합니다.
paynow_action_url 필드를 추가하려면 결제 클래스 생성자 끝에 다음 코드를 추가하세요.

if ( (zen_not_null($module)) && (in_array($module.'.php', $this->modules)) && (isset($GLOBALS[$module]->paynow_action_url)) ) { 
$this->paynow_action_url = $GLOBALS[$module]->paynow_action_url; 
}

paynow_button($order_id) 함수를 추가하려면 마지막 뒤에 추가하세요. 결제 클래스 기능 다음 코드를 추가하세요.

function paynow_button($order_id){ 
if (is_array($this->modules)) { 
if (is_object($GLOBALS[$this->selected_module])) { 
return $GLOBALS[$this->selected_module]->paynow_button($order_id); 
} 
} 
}

2. 페이팔 결제 방식을 예로 들어 구현 방법을 설명합니다. 페이팔의 원래 코드를 파괴하지 않기 위해 paypal.php 파일의 복사본을 만들고 이름을 paypalsimple.php로 지정한 후 내부 코드를 적절하게 수정하겠습니다. 코드는 아래와 같습니다. 여기서는 form_action_url의 지정이 제거되고 paynow_action_url이 부여된 것을 볼 수 있습니다. 왜냐하면 사용자가 "Confirm Order"를 클릭한 후 checkout_process에 직접 진입하기를 바라기 때문에 form_action_url을 지정하지 않으면 주문 확인 양식은 checkout_process 페이지로 직접 제출되며, paynow_action_url은 이전 form_action_url의 값입니다. paynow_button 함수의 구현도 매우 간단합니다. 여기서는 원래 process_button() 함수의 내용을 잘라내지만 전역 $order 변수를 사용하지 않고 $order = new order($order_id)를 사용하여 다시 만듭니다. 지금 결제 버튼을 과거 순서대로 표시하기 위해 생성된 객체입니다.
paypalsimple.php

<?php 
/** 
* @package paypalsimple payment module 
* @copyright Copyright 2003-2006 Zen Cart Development Team 
* @copyright Portions Copyright 2003 osCommerce 
* @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0 
* @version $Id: paypalsimple.php 4960 2009-12-29 11:46:46Z gary $ 
*/ 
// ensure dependencies are loaded 
include_once((IS_ADMIN_FLAG === true ? DIR_FS_CATALOG_MODULES : DIR_WS_MODULES) . &#39;payment/paypal/paypal_functions.php&#39;); 
class paypalsimple { 
var $code, $title, $description, $enabled; 
// class constructor 
function paypalsimple() { 
global $order; 
$this->code = &#39;paypalsimple&#39;; 
$this->title = MODULE_PAYMENT_PAYPAL_SIMPLE_TEXT_TITLE; 
if(IS_ADMIN_FLAG === true){ 
$this->title = MODULE_PAYMENT_PAYPAL_SIMPLE_TEXT_ADMIN_TITLE; 
} 
$this->description = MODULE_PAYMENT_PAYPAL_SIMPLE_TEXT_DESCRIPTION; 
$this->sort_order = MODULE_PAYMENT_PAYPAL_SIMPLE_SORT_ORDER; 
$this->enabled = ((MODULE_PAYMENT_PAYPAL_SIMPLE_STATUS == &#39;True&#39;) ? true : false); 
if ((int)MODULE_PAYMENT_PAYPAL_SIMPLE_ORDER_STATUS_ID > 0) { 
$this->order_status = MODULE_PAYMENT_PAYPAL_SIMPLE_ORDER_STATUS_ID; 
} 
$this->paynow_action_url = &#39;https://&#39; . MODULE_PAYMENT_PAYPAL_SIMPLE_HANDLER; 
if (is_object($order)) $this->update_status(); 
} 
// class methods 
function update_status() { 
global $order, $db; 
if ( ($this->enabled == true) && ((int)MODULE_PAYMENT_PAYPAL_SIMPLE_ZONE > 0) ) { 
$check_flag = false; 
$check = $db->Execute("select zone_id from " . TABLE_ZONES_TO_GEO_ZONES . " where geo_zone_id = &#39;" . MODULE_PAYMENT_PAYPAL_SIMPLE_ZONE . "&#39; and zone_country_id = &#39;" . $order->billing[&#39;country&#39;][&#39;id&#39;] . "&#39; order by zone_id"); 
while (!$check->EOF) { 
if ($check->fields[&#39;zone_id&#39;] < 1) { 
$check_flag = true; 
break; 
} elseif ($check->fields[&#39;zone_id&#39;] == $order->billing[&#39;zone_id&#39;]) { 
$check_flag = true; 
break; 
} 
$check->MoveNext(); 
} 
if ($check_flag == false) { 
$this->enabled = false; 
} 
} 
} 
function javascript_validation() { 
return false; 
} 
function selection() { 
$text = MODULE_PAYMENT_SIMPLE_PAYPAL_TEXT_CATALOG_LOGO.&#39;  &#39;.MODULE_PAYMENT_PAYPAL_SIMPLE_TEXT_TITLE . &#39;<br/><br/>    <span class="smallText">&#39; . MODULE_PAYMENT_PAYPAL_SIMPLE_ACCEPTANCE_MARK_TEXT . &#39;</span><br/><br/>&#39;; 
return array(&#39;id&#39; => $this->code, 
&#39;module&#39; => $text 
); 
} 
function pre_confirmation_check() { 
return false; 
} 
function confirmation() { 
return false; 
} 
function process_button() { 
return false; 
} 
function before_process() { 
return false; 
} 
function after_process() { 
return false; 
} 
function get_error() { 
return false; 
} 
function check() { 
global $db; 
if (!isset($this->_check)) { 
$check_query = $db->Execute("select configuration_value from " . TABLE_CONFIGURATION . " where configuration_key = &#39;MODULE_PAYMENT_PAYPAL_SIMPLE_STATUS&#39;"); 
$this->_check = $check_query->RecordCount(); 
} 
return $this->_check; 
} 
function install() { 
global $db; 
$db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function, date_added) values (&#39;Enable PayPal-Simple Module&#39;, &#39;MODULE_PAYMENT_PAYPAL_SIMPLE_STATUS&#39;, &#39;True&#39;, &#39;Do you want to accept PayPal-Simple payments?&#39;, &#39;6&#39;, &#39;0&#39;, &#39;zen_cfg_select_option(array(\&#39;True\&#39;, \&#39;False\&#39;), &#39;, now())"); 
$db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values (&#39;Sort order of display.&#39;, &#39;MODULE_PAYMENT_PAYPAL_SIMPLE_SORT_ORDER&#39;, &#39;0&#39;, &#39;Sort order of display. Lowest is displayed first.&#39;, &#39;6&#39;, &#39;8&#39;, now())"); 
$db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, use_function, set_function, date_added) values (&#39;Payment Zone&#39;, &#39;MODULE_PAYMENT_PAYPAL_SIMPLE_ZONE&#39;, &#39;0&#39;, &#39;If a zone is selected, only enable this payment method for that zone.&#39;, &#39;6&#39;, &#39;2&#39;, &#39;zen_get_zone_class_title&#39;, &#39;zen_cfg_pull_down_zone_classes(&#39;, now())"); 
$db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function, use_function, date_added) values (&#39;Set Order Status&#39;, &#39;MODULE_PAYMENT_PAYPAL_SIMPLE_ORDER_STATUS_ID&#39;, &#39;0&#39;, &#39;Set the status of orders made with this payment module to this value&#39;, &#39;6&#39;, &#39;0&#39;, &#39;zen_cfg_pull_down_order_statuses(&#39;, &#39;zen_get_order_status_name&#39;, now())"); 
$db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function, date_added) values (&#39;Mode for PayPal web services<br /><br />Default:<br /><code>www.paypal.com/cgi-bin/webscr</code><br />or<br /><code>www.paypal.com/us/cgi-bin/webscr</code><br />or for the UK,<br /><code>www.paypal.com/uk/cgi-bin/webscr</code>&#39;, &#39;MODULE_PAYMENT_PAYPAL_SIMPLE_HANDLER&#39;, &#39;www.paypal.com/cgi-bin/webscr&#39;, &#39;Choose the URL for PayPal live processing&#39;, &#39;6&#39;, &#39;73&#39;, &#39;&#39;, now())"); 
} 
function remove() { 
global $db; 
$db->Execute("delete from " . TABLE_CONFIGURATION . " where configuration_key in (&#39;" . implode("&#39;, &#39;", $this->keys()) . "&#39;)"); 
} 
function keys() { 
return array(&#39;MODULE_PAYMENT_PAYPAL_SIMPLE_STATUS&#39;,&#39;MODULE_PAYMENT_PAYPAL_SIMPLE_SORT_ORDER&#39;,&#39;MODULE_PAYMENT_PAYPAL_SIMPLE_ZONE&#39;,&#39;MODULE_PAYMENT_PAYPAL_SIMPLE_ORDER_STATUS_ID&#39;, &#39;MODULE_PAYMENT_PAYPAL_SIMPLE_HANDLER&#39;); 
} 
function paynow_button($order_id){ 
global $db, $order, $currencies, $currency; 
require_once(DIR_WS_CLASSES . &#39;order.php&#39;); 
$order = new order($order_id); 
$options = array(); 
$optionsCore = array(); 
$optionsPhone = array(); 
$optionsShip = array(); 
$optionsLineItems = array(); 
$optionsAggregate = array(); 
$optionsTrans = array(); 
$buttonArray = array(); 
$this->totalsum = $order->info[&#39;total&#39;]; 
// save the session stuff permanently in case paypal loses the session 
$_SESSION[&#39;ppipn_key_to_remove&#39;] = session_id(); 
$db->Execute("delete from " . TABLE_PAYPAL_SESSION . " where session_id = &#39;" . zen_db_input($_SESSION[&#39;ppipn_key_to_remove&#39;]) . "&#39;"); 
$sql = "insert into " . TABLE_PAYPAL_SESSION . " (session_id, saved_session, expiry) values ( 
&#39;" . zen_db_input($_SESSION[&#39;ppipn_key_to_remove&#39;]) . "&#39;, 
&#39;" . base64_encode(serialize($_SESSION)) . "&#39;, 
&#39;" . (time() + (1*60*60*24*2)) . "&#39;)"; 
$db->Execute($sql); 
$my_currency = select_pp_currency(); 
$this->transaction_currency = $my_currency; 
$this->transaction_amount = ($this->totalsum * $currencies->get_value($my_currency)); 
$telephone = preg_replace(&#39;/\D/&#39;, &#39;&#39;, $order->customer[&#39;telephone&#39;]); 
if ($telephone != &#39;&#39;) { 
$optionsPhone[&#39;H_PhoneNumber&#39;] = $telephone; 
if (in_array($order->customer[&#39;country&#39;][&#39;iso_code_2&#39;], array(&#39;US&#39;,&#39;CA&#39;))) { 
$optionsPhone[&#39;night_phone_a&#39;] = substr($telephone,0,3); 
$optionsPhone[&#39;night_phone_b&#39;] = substr($telephone,3,3); 
$optionsPhone[&#39;night_phone_c&#39;] = substr($telephone,6,4); 
$optionsPhone[&#39;day_phone_a&#39;] = substr($telephone,0,3); 
$optionsPhone[&#39;day_phone_b&#39;] = substr($telephone,3,3); 
$optionsPhone[&#39;day_phone_c&#39;] = substr($telephone,6,4); 
} else { 
$optionsPhone[&#39;night_phone_b&#39;] = $telephone; 
$optionsPhone[&#39;day_phone_b&#39;] = $telephone; 
} 
} 
$optionsCore = array( 
&#39;charset&#39; => CHARSET, 
&#39;lc&#39; => $order->customer[&#39;country&#39;][&#39;iso_code_2&#39;], 
&#39;page_style&#39; => MODULE_PAYMENT_PAYPAL_PAGE_STYLE, 
&#39;custom&#39; => zen_session_name() . &#39;=&#39; . zen_session_id(), 
&#39;business&#39; => MODULE_PAYMENT_PAYPAL_BUSINESS_ID, 
&#39;return&#39; => zen_href_link(FILENAME_PAY_SUCCESS, &#39;referer=paypal&#39;, &#39;SSL&#39;), 
&#39;cancel_return&#39; => zen_href_link(FILENAME_PAY_FAILED, &#39;&#39;, &#39;SSL&#39;), 
&#39;shopping_url&#39; => zen_href_link(FILENAME_SHOPPING_CART, &#39;&#39;, &#39;SSL&#39;), 
&#39;notify_url&#39; => zen_href_link(&#39;ipn_main_handler.php&#39;, &#39;&#39;, &#39;SSL&#39;,false,false,true), 
&#39;redirect_cmd&#39; => &#39;_xclick&#39;, 
&#39;rm&#39; => 2, 
&#39;bn&#39; => &#39;zencart&#39;, 
&#39;mrb&#39; => &#39;R-6C7952342H795591R&#39;, 
&#39;pal&#39; => &#39;9E82WJBKKGPLQ&#39;, 
); 
$optionsCust = array( 
&#39;first_name&#39; => replace_accents($order->customer[&#39;firstname&#39;]), 
&#39;last_name&#39; => replace_accents($order->customer[&#39;lastname&#39;]), 
&#39;address1&#39; => replace_accents($order->customer[&#39;street_address&#39;]), 
&#39;city&#39; => replace_accents($order->customer[&#39;city&#39;]), 
&#39;state&#39; => zen_get_zone_code($order->customer[&#39;country&#39;][&#39;id&#39;], $order->customer[&#39;zone_id&#39;], $order->customer[&#39;zone_id&#39;]), 
&#39;zip&#39; => $order->customer[&#39;postcode&#39;], 
&#39;country&#39; => $order->customer[&#39;country&#39;][&#39;iso_code_2&#39;], 
&#39;email&#39; => $order->customer[&#39;email_address&#39;], 
); 
if ($order->customer[&#39;suburb&#39;] != &#39;&#39;) $optionsCust[&#39;address2&#39;] = $order->customer[&#39;suburb&#39;]; 
if (MODULE_PAYMENT_PAYPAL_ADDRESS_REQUIRED == 2) $optionsCust = array( 
&#39;address_name&#39; => replace_accents($order->customer[&#39;firstname&#39;] . &#39; &#39; . $order->customer[&#39;lastname&#39;]), 
&#39;address_street&#39; => replace_accents($order->customer[&#39;street_address&#39;]), 
&#39;address_city&#39; => replace_accents($order->customer[&#39;city&#39;]), 
&#39;address_state&#39; => zen_get_zone_code($order->customer[&#39;country&#39;][&#39;id&#39;], $order->customer[&#39;zone_id&#39;], $order->customer[&#39;zone_id&#39;]), 
&#39;address_zip&#39; => $order->customer[&#39;postcode&#39;], 
&#39;address_country&#39; => $order->customer[&#39;country&#39;][&#39;title&#39;], 
&#39;address_country_code&#39; => $order->customer[&#39;country&#39;][&#39;iso_code_2&#39;], 
&#39;payer_email&#39; => $order->customer[&#39;email_address&#39;], 
); 
$optionsShip = array( 
//&#39;address_override&#39; => MODULE_PAYMENT_PAYPAL_ADDRESS_OVERRIDE, 
&#39;no_shipping&#39; => MODULE_PAYMENT_PAYPAL_ADDRESS_REQUIRED, 
); 
if (MODULE_PAYMENT_PAYPAL_DETAILED_CART == &#39;Yes&#39;) $optionsLineItems = ipn_getLineItemDetails(); 
if (sizeof($optionsLineItems) > 0) { 
$optionsLineItems[&#39;cmd&#39;] = &#39;_cart&#39;; 
// $optionsLineItems[&#39;num_cart_items&#39;] = sizeof($order->products); 
if (isset($optionsLineItems[&#39;shipping&#39;])) { 
$optionsLineItems[&#39;shipping_1&#39;] = $optionsLineItems[&#39;shipping&#39;]; 
unset($optionsLineItems[&#39;shipping&#39;]); 
} 
if (isset($optionsLineItems[&#39;handling&#39;])) { 
$optionsLineItems[&#39;handling_1&#39;] = $optionsLineItems[&#39;handling&#39;]; 
unset($optionsLineItems[&#39;handling&#39;]); 
} 
unset($optionsLineItems[&#39;subtotal&#39;]); 
// if line-item details couldn&#39;t be kept due to calculation mismatches or discounts etc, default to aggregate mode 
if (!isset($optionsLineItems[&#39;item_name_1&#39;])) $optionsLineItems = array(); 
//if ($optionsLineItems[&#39;amount&#39;] != $this->transaction_amount) $optionsLineItems = array(); 
ipn_debug_email(&#39;Line Item Details (if blank, this means there was a data mismatch, and thus bypassed): &#39; . "\n" . print_r($optionsLineItems, true)); 
} 
$products_name_display = ""; 
/* 
for ($i=0, $n=sizeof($order->products); $i<$n; $i++) { 
if(i > 0) { 
$products_name_display.= &#39;, &#39;; 
} 
$products_name_display.= $order->products[$i][&#39;name&#39;]. &#39;(&#39;. $order->products[$i][&#39;qty&#39;] .&#39;,&#39;.$order->products[$i][&#39;dhisys_web_order_number&#39;].&#39;)&#39;; 
}*/ 
$optionsAggregate = array( 
&#39;cmd&#39; => &#39;_ext-enter&#39;, 
&#39;item_name&#39; => $products_name_display, 
&#39;item_number&#39; => $order_id, 
&#39;num_cart_items&#39; => sizeof($order->products), 
&#39;amount&#39; => number_format($this->transaction_amount, $currencies->get_decimal_places($my_currency)), 
&#39;shipping&#39; => &#39;0.00&#39;, 
); 
if (MODULE_PAYMENT_PAYPAL_TAX_OVERRIDE == &#39;true&#39;) $optionsAggregate[&#39;tax&#39;] = &#39;0.00&#39;; 
if (MODULE_PAYMENT_PAYPAL_TAX_OVERRIDE == &#39;true&#39;) $optionsAggregate[&#39;tax_cart&#39;] = &#39;0.00&#39;; 
$optionsTrans = array( 
&#39;upload&#39; => (int)(sizeof($order->products) > 0), 
&#39;currency_code&#39; => $my_currency, 
// &#39;paypal_order_id&#39; => $paypal_order_id, 
//&#39;no_note&#39; => &#39;1&#39;, 
//&#39;invoice&#39; => &#39;&#39;, 
); 
// if line-item info is invalid, use aggregate: 
if (sizeof($optionsLineItems) > 0) $optionsAggregate = $optionsLineItems; 
// prepare submission 
$options = array_merge($optionsCore, $optionsCust, $optionsPhone, $optionsShip, $optionsTrans, $optionsAggregate); 
ipn_debug_email(&#39;Keys for submission: &#39; . print_r($options, true)); 
if(sizeof($order->products) > 0){ 
$options[&#39;cmd&#39;] = &#39;_cart&#39;; 
for ($i=0, $n=sizeof($order->products); $i<$n; $i++) { 
$options[&#39;item_name_&#39;. (string)($i+1)] = $order->products[$i][&#39;name&#39;]; 
$options[&#39;item_number_&#39;. (string)($i+1)] = $order->products[$i][&#39;dhisys_web_order_number&#39;]; 
$options[&#39;amount_&#39;. (string)($i+1)] = number_format((float)$order->products[$i][&#39;final_price&#39;],2); 
$options[&#39;quantity_&#39;. (string)($i+1)] = $order->products[$i][&#39;qty&#39;]; 
} 
} 
// build the button fields 
foreach ($options as $name => $value) { 
// remove quotation marks 
$value = str_replace(&#39;"&#39;, &#39;&#39;, $value); 
// check for invalid chars 
if (preg_match(&#39;/[^a-zA-Z_0-9]/&#39;, $name)) { 
ipn_debug_email(&#39;datacheck - ABORTING - preg_match found invalid submission key: &#39; . $name . &#39; (&#39; . $value . &#39;)&#39;); 
break; 
} 
// do we need special handling for & and = symbols? 
//if (strpos($value, &#39;&&#39;) !== false || strpos($value, &#39;=&#39;) !== false) $value = urlencode($value); 
$buttonArray[] = zen_draw_hidden_field($name, $value); 
} 
$_SESSION[&#39;paypal_transaction_info&#39;] = array($this->transaction_amount, $this->transaction_currency); 
$process_button_string = implode("\n", $buttonArray) . "\n"; 
return $process_button_string; 
} 
} 
?>

3. checkout_success 페이지에 지금 결제 버튼을 표시합니다. "includes/modules/pages/checkout_success/header.php" 파일을 열고 파일 끝에 다음 코드를 추가합니다(zen-cart에서 알리미/관찰자 모드를 마스터했고 zen- 장바구니 핵심 코드가 그렇다면 NOTIFY_HEADER_END_CHECKOUT_SUCCESS를 수신하는 관찰 클래스를 생성할 수도 있습니다.

require_once(DIR_WS_CLASSES . 'order.php'); 
require_once(DIR_WS_CLASSES . 'payment.php'); 
$payment_modules = new payment($orders->fields['payment_module_code']);

"includes/modules/templates/template_default/templates/tpl_checkout_success_default.php" 파일을 열고 해당 위치에 다음 코드를 추가합니다. 여기서 주문 상태에 대한 판단이 이루어집니다. 이 버튼은 주문 상태가 미결제일 때만 표시됩니다.

<div id="pay_now"> 
<?php 
//&& $orders->fields[&#39;orders_status&#39;] == &#39;1&#39; 
if(isset($payment_modules->paynow_action_url) && $payment_modules->paynow_action_url != &#39;&#39;&& $orders->fields[&#39;orders_status&#39;] == &#39;1&#39;){ 
echo(&#39;<fieldset id="csNotifications">&#39;); 
echo(&#39;<legend>&#39;.TEXT_PAYNOW.&#39;</legend>&#39;); 
echo zen_draw_form(&#39;checkout_paynow&#39;, $payment_modules->paynow_action_url, &#39;post&#39;, &#39;id="checkout_confirmation" onsubmit="submitonce();"&#39;); 
$selection = $payment_modules->selection(); 
echo(&#39;<div class="buttonRow payment_method">&#39;.$selection[0][&#39;module&#39;].&#39;</div>&#39;); 
echo(&#39;<div class="buttonRow forward paynow">&#39;); 
if (is_array($payment_modules->modules)) { 
echo $payment_modules->paynow_button($orders_id); 
} 
echo(zen_image_submit(BUTTON_IMAGE_PAYNOW, BUTTON_IMAGE_PAYNOW_ALT, &#39;name="btn_paynow" id="btn_paynow"&#39;)); 
echo(&#39;</div>&#39;); 
echo(&#39;</form>&#39;); 
echo(&#39;</fieldset>&#39;); 
} 
?> 
</div>

4. 在历史订单中显示pay now按钮。需要显示pay now按钮的页面有三个：account, account_history,account_history_info，这里的实现和checkout_success页面的实现大同小异，只是传给$payment_modules的函数paynow_button的参数不一样而已，这里就不再赘述。 
总结： 
经过上面的修改，我们的流程如下： 
1. 购物车(shopping cart) 
2. [货运方式(delivery method)] 
3. 支付方式(payment method) 
4. 订单确认(confirmation) 
5. 订单处理(checkout process) 
6. 下单成功(checkout success) 
7. [第三方网站支付] 
因为从订单确认到订单处理，都是在我们自己的网站完成的，并且进入支付网站之前，订单已经存在了，这样就不会出现掉单的情况了。 

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