用过zen-cart的人都知道,zen-cart中下单步骤是下面这样的(其中[]中的表示不是必须的):
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. [第三方网站支付]
6. 订单处理(checkout process)——这一步比较重要,因为会在这里将购物车中的信息写入订单
7. 下单成功(checkout success)
这样的流程在正常情况下是没有任何问题的。但是,从第5步到第6部的过程中,用户可能以为付款成功就直接关闭掉网页了,或者由于网络原因造成不能正常跳转到checkout_process页面,这样造成的后果是很严重的,因为订单不能被正常的创建。
基于上述的分析, 我们希望稍微地改变一下流程,即在支付之前订单已经创建好了,这样就算在支付时不能从第三方支付网站跳转回来,我们也不会存在用户付款成功却在后台没有订单的情况了。经过修改后的蓝图基本是下面这样的:
1. 在checkour_confirmation页面确认订单后,都会直接proccess,并且进入checkour_success页面,可以在这里进入付款页面。如下图所示:
2. 如果当时客户没能付款,也可进入自己的后台对历史订单进行付款。如下图所示:
下面我们就来看看如何一步一步来实现上述的功能。
1. 首先我们需要对现有的支付模块进行一个改造。需要对支付方式的class增加一个字段paynow_action_url,用来表示进行支付的页面url,另外还需要增加一个函数,paynow_button($order_id),来获取支付表单的参数隐藏域代码。
要增加paynow_action_url字段,请在类payment的构造函数中最后加上下面的代码:
if ( (zen_not_null($module)) && (in_array($module.'.php', $this->modules)) && (isset($GLOBALS[$module]->paynow_action_url)) ) { $this->paynow_action_url = $GLOBALS[$module]->paynow_action_url; }
要增加paynow_button($order_id)函数,请在payment类的最后一个函数之后加上如下的代码:
function paynow_button($order_id){ if (is_array($this->modules)) { if (is_object($GLOBALS[$this->selected_module])) { return $GLOBALS[$this->selected_module]->paynow_button($order_id); } } }
2. 以paypal支付方式为例子,说明如何具体实现。为了不破坏paypal原有的代码,我们将paypal.php文件拷贝一个副本出来,并命名为paypalsimple.php,并对里面的代码做适当的修改。代码如下所示,可以看到,这里去掉了对form_action_url的指定,并给定了paynow_action_url,因为我们希望用户点击“确认订单”后直接进入checkout_process,所以如果不指定form_action_url,那么确认订单的表单就会直接提交到checkout_process页面了,而paynow_action_url就是以前的form_action_url的值。paynow_button函数的实现也很简单,这里只是将原先的process_button()函数的内容剪切过来而已,只不过我们没有使用全局的$order变量,而是使用$order = new order($order_id),来重新构造的一个对象,这样做是为在历史订单中显示pay now按钮做准备的。
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) . 'payment/paypal/paypal_functions.php'); class paypalsimple { var $code, $title, $description, $enabled; // class constructor function paypalsimple() { global $order; $this->code = 'paypalsimple'; $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 == 'True') ? true : false); if ((int)MODULE_PAYMENT_PAYPAL_SIMPLE_ORDER_STATUS_ID > 0) { $this->order_status = MODULE_PAYMENT_PAYPAL_SIMPLE_ORDER_STATUS_ID; } $this->paynow_action_url = 'https://' . MODULE_PAYMENT_PAYPAL_SIMPLE_HANDLER; if (is_object($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 = '" . MODULE_PAYMENT_PAYPAL_SIMPLE_ZONE . "' and zone_country_id = '" . $order->billing['country']['id'] . "' order by zone_id"); while (!$check->EOF) { if ($check->fields['zone_id'] < 1) { $check_flag = true; break; } elseif ($check->fields['zone_id'] == $order->billing['zone_id']) { $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.' '.MODULE_PAYMENT_PAYPAL_SIMPLE_TEXT_TITLE . '<br/><br/> <span class="smallText">' . MODULE_PAYMENT_PAYPAL_SIMPLE_ACCEPTANCE_MARK_TEXT . '</span><br/><br/>'; return array('id' => $this->code, 'module' => $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 = 'MODULE_PAYMENT_PAYPAL_SIMPLE_STATUS'"); $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 ('Enable PayPal-Simple Module', 'MODULE_PAYMENT_PAYPAL_SIMPLE_STATUS', 'True', 'Do you want to accept PayPal-Simple payments?', '6', '0', 'zen_cfg_select_option(array(\'True\', \'False\'), ', now())"); $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Sort order of display.', 'MODULE_PAYMENT_PAYPAL_SIMPLE_SORT_ORDER', '0', 'Sort order of display. Lowest is displayed first.', '6', '8', 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 ('Payment Zone', 'MODULE_PAYMENT_PAYPAL_SIMPLE_ZONE', '0', 'If a zone is selected, only enable this payment method for that zone.', '6', '2', 'zen_get_zone_class_title', 'zen_cfg_pull_down_zone_classes(', 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 ('Set Order Status', 'MODULE_PAYMENT_PAYPAL_SIMPLE_ORDER_STATUS_ID', '0', 'Set the status of orders made with this payment module to this value', '6', '0', 'zen_cfg_pull_down_order_statuses(', 'zen_get_order_status_name', 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 ('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>', 'MODULE_PAYMENT_PAYPAL_SIMPLE_HANDLER', 'www.paypal.com/cgi-bin/webscr', 'Choose the URL for PayPal live processing', '6', '73', '', now())"); } function remove() { global $db; $db->Execute("delete from " . TABLE_CONFIGURATION . " where configuration_key in ('" . implode("', '", $this->keys()) . "')"); } function keys() { return array('MODULE_PAYMENT_PAYPAL_SIMPLE_STATUS','MODULE_PAYMENT_PAYPAL_SIMPLE_SORT_ORDER','MODULE_PAYMENT_PAYPAL_SIMPLE_ZONE','MODULE_PAYMENT_PAYPAL_SIMPLE_ORDER_STATUS_ID', 'MODULE_PAYMENT_PAYPAL_SIMPLE_HANDLER'); } function paynow_button($order_id){ global $db, $order, $currencies, $currency; require_once(DIR_WS_CLASSES . 'order.php'); $order = new order($order_id); $options = array(); $optionsCore = array(); $optionsPhone = array(); $optionsShip = array(); $optionsLineItems = array(); $optionsAggregate = array(); $optionsTrans = array(); $buttonArray = array(); $this->totalsum = $order->info['total']; // save the session stuff permanently in case paypal loses the session $_SESSION['ppipn_key_to_remove'] = session_id(); $db->Execute("delete from " . TABLE_PAYPAL_SESSION . " where session_id = '" . zen_db_input($_SESSION['ppipn_key_to_remove']) . "'"); $sql = "insert into " . TABLE_PAYPAL_SESSION . " (session_id, saved_session, expiry) values ( '" . zen_db_input($_SESSION['ppipn_key_to_remove']) . "', '" . base64_encode(serialize($_SESSION)) . "', '" . (time() + (1*60*60*24*2)) . "')"; $db->Execute($sql); $my_currency = select_pp_currency(); $this->transaction_currency = $my_currency; $this->transaction_amount = ($this->totalsum * $currencies->get_value($my_currency)); $telephone = preg_replace('/\D/', '', $order->customer['telephone']); if ($telephone != '') { $optionsPhone['H_PhoneNumber'] = $telephone; if (in_array($order->customer['country']['iso_code_2'], array('US','CA'))) { $optionsPhone['night_phone_a'] = substr($telephone,0,3); $optionsPhone['night_phone_b'] = substr($telephone,3,3); $optionsPhone['night_phone_c'] = substr($telephone,6,4); $optionsPhone['day_phone_a'] = substr($telephone,0,3); $optionsPhone['day_phone_b'] = substr($telephone,3,3); $optionsPhone['day_phone_c'] = substr($telephone,6,4); } else { $optionsPhone['night_phone_b'] = $telephone; $optionsPhone['day_phone_b'] = $telephone; } } $optionsCore = array( 'charset' => CHARSET, 'lc' => $order->customer['country']['iso_code_2'], 'page_style' => MODULE_PAYMENT_PAYPAL_PAGE_STYLE, 'custom' => zen_session_name() . '=' . zen_session_id(), 'business' => MODULE_PAYMENT_PAYPAL_BUSINESS_ID, 'return' => zen_href_link(FILENAME_PAY_SUCCESS, 'referer=paypal', 'SSL'), 'cancel_return' => zen_href_link(FILENAME_PAY_FAILED, '', 'SSL'), 'shopping_url' => zen_href_link(FILENAME_SHOPPING_CART, '', 'SSL'), 'notify_url' => zen_href_link('ipn_main_handler.php', '', 'SSL',false,false,true), 'redirect_cmd' => '_xclick', 'rm' => 2, 'bn' => 'zencart', 'mrb' => 'R-6C7952342H795591R', 'pal' => '9E82WJBKKGPLQ', ); $optionsCust = array( 'first_name' => replace_accents($order->customer['firstname']), 'last_name' => replace_accents($order->customer['lastname']), 'address1' => replace_accents($order->customer['street_address']), 'city' => replace_accents($order->customer['city']), 'state' => zen_get_zone_code($order->customer['country']['id'], $order->customer['zone_id'], $order->customer['zone_id']), 'zip' => $order->customer['postcode'], 'country' => $order->customer['country']['iso_code_2'], 'email' => $order->customer['email_address'], ); if ($order->customer['suburb'] != '') $optionsCust['address2'] = $order->customer['suburb']; if (MODULE_PAYMENT_PAYPAL_ADDRESS_REQUIRED == 2) $optionsCust = array( 'address_name' => replace_accents($order->customer['firstname'] . ' ' . $order->customer['lastname']), 'address_street' => replace_accents($order->customer['street_address']), 'address_city' => replace_accents($order->customer['city']), 'address_state' => zen_get_zone_code($order->customer['country']['id'], $order->customer['zone_id'], $order->customer['zone_id']), 'address_zip' => $order->customer['postcode'], 'address_country' => $order->customer['country']['title'], 'address_country_code' => $order->customer['country']['iso_code_2'], 'payer_email' => $order->customer['email_address'], ); $optionsShip = array( //'address_override' => MODULE_PAYMENT_PAYPAL_ADDRESS_OVERRIDE, 'no_shipping' => MODULE_PAYMENT_PAYPAL_ADDRESS_REQUIRED, ); if (MODULE_PAYMENT_PAYPAL_DETAILED_CART == 'Yes') $optionsLineItems = ipn_getLineItemDetails(); if (sizeof($optionsLineItems) > 0) { $optionsLineItems['cmd'] = '_cart'; // $optionsLineItems['num_cart_items'] = sizeof($order->products); if (isset($optionsLineItems['shipping'])) { $optionsLineItems['shipping_1'] = $optionsLineItems['shipping']; unset($optionsLineItems['shipping']); } if (isset($optionsLineItems['handling'])) { $optionsLineItems['handling_1'] = $optionsLineItems['handling']; unset($optionsLineItems['handling']); } unset($optionsLineItems['subtotal']); // if line-item details couldn't be kept due to calculation mismatches or discounts etc, default to aggregate mode if (!isset($optionsLineItems['item_name_1'])) $optionsLineItems = array(); //if ($optionsLineItems['amount'] != $this->transaction_amount) $optionsLineItems = array(); ipn_debug_email('Line Item Details (if blank, this means there was a data mismatch, and thus bypassed): ' . "\n" . print_r($optionsLineItems, true)); } $products_name_display = ""; /* for ($i=0, $n=sizeof($order->products); $i<$n; $i++) { if(i > 0) { $products_name_display.= ', '; } $products_name_display.= $order->products[$i]['name']. '('. $order->products[$i]['qty'] .','.$order->products[$i]['dhisys_web_order_number'].')'; }*/ $optionsAggregate = array( 'cmd' => '_ext-enter', 'item_name' => $products_name_display, 'item_number' => $order_id, 'num_cart_items' => sizeof($order->products), 'amount' => number_format($this->transaction_amount, $currencies->get_decimal_places($my_currency)), 'shipping' => '0.00', ); if (MODULE_PAYMENT_PAYPAL_TAX_OVERRIDE == 'true') $optionsAggregate['tax'] = '0.00'; if (MODULE_PAYMENT_PAYPAL_TAX_OVERRIDE == 'true') $optionsAggregate['tax_cart'] = '0.00'; $optionsTrans = array( 'upload' => (int)(sizeof($order->products) > 0), 'currency_code' => $my_currency, // 'paypal_order_id' => $paypal_order_id, //'no_note' => '1', //'invoice' => '', ); // if line-item info is invalid, use aggregate: if (sizeof($optionsLineItems) > 0) $optionsAggregate = $optionsLineItems; // prepare submission $options = array_merge($optionsCore, $optionsCust, $optionsPhone, $optionsShip, $optionsTrans, $optionsAggregate); ipn_debug_email('Keys for submission: ' . print_r($options, true)); if(sizeof($order->products) > 0){ $options['cmd'] = '_cart'; for ($i=0, $n=sizeof($order->products); $i<$n; $i++) { $options['item_name_'. (string)($i+1)] = $order->products[$i]['name']; $options['item_number_'. (string)($i+1)] = $order->products[$i]['dhisys_web_order_number']; $options['amount_'. (string)($i+1)] = number_format((float)$order->products[$i]['final_price'],2); $options['quantity_'. (string)($i+1)] = $order->products[$i]['qty']; } } // build the button fields foreach ($options as $name => $value) { // remove quotation marks $value = str_replace('"', '', $value); // check for invalid chars if (preg_match('/[^a-zA-Z_0-9]/', $name)) { ipn_debug_email('datacheck - ABORTING - preg_match found invalid submission key: ' . $name . ' (' . $value . ')'); break; } // do we need special handling for & and = symbols? //if (strpos($value, '&') !== false || strpos($value, '=') !== false) $value = urlencode($value); $buttonArray[] = zen_draw_hidden_field($name, $value); } $_SESSION['paypal_transaction_info'] = array($this->transaction_amount, $this->transaction_currency); $process_button_string = implode("\n", $buttonArray) . "\n"; return $process_button_string; } } ?>
3. 在checkout_success页面中显示pay now按钮。打开文件"includes/modules/pages/checkout_success/header.php",在文件的末尾添加下面的代码(如果你已经掌握zen-cart中的通知者/观察者模式,并且又不想破坏zen-cart核心代码的话,也可以创建一个观察类来监听NOTIFY_HEADER_END_CHECKOUT_SUCCESS来实现)。
require_once(DIR_WS_CLASSES . 'order.php'); require_once(DIR_WS_CLASSES . 'payment.php'); $payment_modules = new payment($orders->fields['payment_module_code']);
打开文件"includes/modules/templates/template_default/templates/tpl_checkout_success_default.php",并在适当的位置加上如下的代码,这里对订单的状态进行了一个判断,当只有订单的状态在未付款状态,才显示该按钮,
<div id="pay_now"> <?php //&& $orders->fields['orders_status'] == '1' if(isset($payment_modules->paynow_action_url) && $payment_modules->paynow_action_url != ''&& $orders->fields['orders_status'] == '1'){ echo('<fieldset id="csNotifications">'); echo('<legend>'.TEXT_PAYNOW.'</legend>'); echo zen_draw_form('checkout_paynow', $payment_modules->paynow_action_url, 'post', 'id="checkout_confirmation" onsubmit="submitonce();"'); $selection = $payment_modules->selection(); echo('<div class="buttonRow payment_method">'.$selection[0]['module'].'</div>'); echo('<div class="buttonRow forward paynow">'); if (is_array($payment_modules->modules)) { echo $payment_modules->paynow_button($orders_id); } echo(zen_image_submit(BUTTON_IMAGE_PAYNOW, BUTTON_IMAGE_PAYNOW_ALT, 'name="btn_paynow" id="btn_paynow"')); echo('</div>'); echo('</form>'); echo('</fieldset>'); } ?> </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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