后端开发|php教程
php,zen-cart
后端开发-php教程
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。下图例：
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。下图例：
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($order_id)，来获取支付表单的参数隐藏域代码。
要增加paynow_action_url字段，请在类payment的构造函数中最后加上下面的代码：
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if ( (zen_not_null($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($order_id)函数，请在payment类的最后一个函数之后加上如下的代码：
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function paynow_button($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
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<?php
/**
* @package paypalsimple payment module
* @copyright Copyright - Zen Cart Development Team
* @copyright Portions Copyright osCommerce
* @license http://www.zen-/license/2_0.txt GNU Public License V2.0
* @version $Id: paypalsimple.php 4960 -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 .
. MODULE_PAYMENT_PAYPAL_SIMPLE_ACCEPTANCE_MARK_TEXT .
;
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, , 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, , 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, , 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, , Set the status of orders made with this payment module to this value, 6, , 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
Default:
/cgi-bin/webscr
or
/us/cgi-bin/webscr
or for the UK,
/uk/cgi-bin/webscr, MODULE_PAYMENT_PAYPAL_SIMPLE_HANDLER, /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[ otal];
// 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/, \, $order->customer[ elephone]);
if ($telephone != \) {
$optionsPhone[H_PhoneNumber] = $telephone;
if (in_array($order->customer[country][iso_code_2], array(US,CA))) {
$optionsPhone[ ight_phone_a] = substr($telephone,0,3);
$optionsPhone[ ight_phone_b] = substr($telephone,3,3);
$optionsPhone[ ight_phone_c] = substr($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[ ight_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(),
usiness => MODULE_PAYMENT_PAYPAL_BUSINESS_ID,
eturn => zen_href_link(FILENAME_PAY_SUCCESS, eferer=paypal, SSL),
cancel_return => zen_href_link(FILENAME_PAY_FAILED, \, SSL),
shopping_url => zen_href_link(FILENAME_SHOPPING_CART, \, SSL),
otify_url => zen_href_link(ipn_main_handler.php, \, SSL,false,false,true),
edirect_cmd => \_xclick,
m => 2,
n => 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][ itle],
address_country_code => $order->customer[country][iso_code_2],
payer_email => $order->customer[email_address],
);
$optionsShip = array(
//address_override => MODULE_PAYMENT_PAYPAL_ADDRESS_OVERRIDE,
o_shipping => MODULE_PAYMENT_PAYPAL_ADDRESS_REQUIRED,
);
if (MODULE_PAYMENT_PAYPAL_DETAILED_CART == Yes) $optionsLineItems = ipn_getLineItemDetails();
if (sizeof($optionsLineItems) > 0) {
$optionsLineItems[cmd] = \_cart;
// $optionsLineItems[ um_cart_items] = sizeof($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($optionsLineItems[subtotal]);
// if line-item details couldn be kept due to calculation mismatches or discounts etc, default to aggregate mode
if (!isset($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][ ame]. (. $order->products[$i][qty] .,.$order->products[$i][dhisys_web_order_number].);
}*/
$optionsAggregate = array(
cmd => \_ext-enter,
item_name => $products_name_display,
item_number => $order_id,
um_cart_items => sizeof($order->products),
amount => number_format($this->transaction_amount, $currencies->get_decimal_places($my_currency)),
shipping => .00,
);
if (MODULE_PAYMENT_PAYPAL_TAX_OVERRIDE == rue) $optionsAggregate[ ax] = .00;
if (MODULE_PAYMENT_PAYPAL_TAX_OVERRIDE == rue) $optionsAggregate[ ax_cart] = .00;
$optionsTrans = array(
upload => (int)(sizeof($order->products) > 0),
currency_code => $my_currency,
// paypal_order_id => $paypal_order_id,
// o_note => 1,
//invoice => \,
);
// if line-item info is invalid, use aggregate:
if (sizeof($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][ ame];
$options[item_number_. (string)($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，
<?php
//&& $orders->fields[orders_status] == 1
if(isset($payment_modules->paynow_action_url) && $payment_modules->paynow_action_url != \&& $orders->fields[orders_status] == 1){
echo(\);
}
?> 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。
