The CheckoutShoppingCartDemoAlternativeMethod.php page demonstrates how to send a Checkout API request to Google Checkout using a server-to-server HTTP POST request.
To adapt the CheckoutShoppingCartDemoAlternativeMethod.php implementation for use in your site, you will need to update the function calls to use your own product data, tax tables and shipping information.
* Include Google Checkout PHP Client Library and other libraries
* used to create shopping cart and send server-to-server request.
*/
include ("GlobalAPIFunctions.php");
include ("CheckoutAPIFunctions.php");
include ("ResponseHandlerAPIFunctions.php");
/*
* This page posts requests to itself. When you navigate to this page,
* it will display an HTML page containing information about server-to-server
* Checkout API requests. It will also display a Google Checkout button.
* The HTML for this page is contained within the following "if" block.
* When you click the Google Checkout button, the page will submit an
* HTTP POST request to itself. This request will set the
* $_SERVER["REQUEST_METHOD"] variable equal to "POST". As such, the HTML
* form will not display and the code within the "elseif" portion of this
* "if-elseif" block will execute. That code executes a server-to-server
* HTTP POST request and then redirects the user to the <redirect-url>
* returned in the Google Checkout <checkout-redirect> response.
*
* +++ CHANGE ME +++
* If your site submits server-to-server Checkout API requests, you may want
* to change the form's action so that the form submits to a different page.
*/
if ($_SERVER["REQUEST_METHOD"] != "POST") {
?>
<html>
<head>
<style type="text/css">@import url(googleCheckout.css);</style>
</head>
<body>
<p style="text-align:center">
<table class="table-1" cellspacing="5" cellpadding="5">
<tr><td style="padding-bottom:20px"><h2>
Place a New Order using the Alternative Method
</h2></td></tr>
<tr><td>
<p><b>The alternative method of posting Checkout API requests
contains the following steps:</b></p>
<p><ol>
<li>The Merchant web page displays a Google Checkout button.
The button is contained in a form that submits to the
merchant's server.</li>
<li>When the customer clicks the Google Checkout button, the
merchant's server generates the
<checkout-shopping-cart> XML and posts the shopping
cart directly to the Google Checkout server.</li>
<li>The Google Checkout server responds to the merchant's
request with a <checkout-redirect> XML response, which
contains a <redirect-url>.</li>
<li>The Merchant returns an HTTP 302 redirect to the
customer's browser.</li>
<li>The customer's browser follows the redirect, bringing
the customer to the Google Checkout order page.</li>
</ol></p>
<p> </p>
<p><b>Click on the Checkout button to post a cart using this
Alternative Method.</b></p>
<?php
// Google Checkout button implementation
$button_w = "180";
$button_h = "46";
$button_style = "white";
$button_variant = "text";
$button_loc = "en_US";
$button_src =
"https://sandbox.google.com/checkout/buttons/checkout.gif" .
"?merchant_id=" . $GLOBALS["merchant_id"] .
"&w=" . $button_w .
"&h=" . $button_h .
"&style=" . $button_style .
"&variant=" . $button_variant .
"&loc=" . $button_loc;
?>
<p><form method="POST"
action="<?php echo $_SERVER["REQUEST_URI"]; ?>">
<input type="image" name="Checkout" alt="Checkout"
src="<?php echo $button_src; ?>" height="46" width="180">
</form></p>
</td></tr>
</table>
</p>
</body>
</html>
<?
} elseif ($_SERVER["REQUEST_METHOD"] == "POST") {
/**
* Build XML for items in the shopping cart. The shopping cart
* has the following structure:
*
* <shopping-cart>
* <items>
* <item>
* <item-name>Dry Food Pack AA1453</item-name>
* <item-description>A pack of nutritious food.</item-description>
* <quantity>1</quantity>
* <unit-price currency="USD">35.00</unit-price>
* <tax-table-selector>food</tax-table-selector>
* <merchant-private-item-data>
* <item-note>Product Number N15037124531</item-note>
* </merchant-private-item-data>
* </item>
* <!-- More items may be included using the same XML structure -->
* </items>
* </shopping-cart>
*/
/*
* The XML for an individual item is created by defining data fields
* for the item and then calling the CreateItem() function, which
* is in the CheckoutAPIFunctions.php file.
*
* +++ CHANGE ME +++
* You will need to modify calls to functions like CreateItem,
* AddAllowedAreas, AddExcludedAreas, CreateFlatRateShipping and
* numerous others in this file to reflect the items in the
* customer's shopping cart, the shipping options available for
* those items and the tax tables that you use to calculate taxes.
*/
// Specify item data and create an item to include in the order
$item_name = "Dry Food Pack AA1453";
$item_description = "A pack of highly nutritious dried food for emergency.";
$quantity = "1";
$unit_price = "35.00";
$tax_table_selector = "food";
$merchant_private_item_data = "";
CreateItem($item_name, $item_description, $quantity, $unit_price,
$tax_table_selector, $merchant_private_item_data);
// Specify item data and create a second item to include in the order
$item_name = "MegaSound 2GB MP3 Player";
$item_description = "Portable MP3 player - stores 500 songs, easy-to-use.";
$quantity = "1";
$unit_price = "178.00";
$tax_table_selector = "";
$merchant_private_item_data =
"<item-note>Product Number N15037124531</item-note>";
CreateItem($item_name, $item_description, $quantity, $unit_price,
$tax_table_selector, $merchant_private_item_data);
// Specify an expiration date for the order and build <shopping-cart>
$cart_expiration = "2006-12-31T23:59:59";
$merchant_private_data =
"<merchant-note>My order number 9876543</merchant-note>";
CreateShoppingCart($cart_expiration, $merchant_private_data);
// Create list of areas where a particular shipping option is available
$allowed_country_area = "ALL"; // OR: "CONTINENTAL_48", "FULL_50_STATES"
$allowed_state = array(); // Ex: array("CA", "NY", "DC", "NC")
$allowed_zip = array(); // Ex: array("94043", "94086", "91801", "91362")
$shipping_restrictions = AddAllowedAreas($allowed_country_area,
$allowed_state, $allowed_zip);
// Create list of areas where a particular shipping option is not available
$excluded_country_area = "";
$excluded_state = array("AL", "MA", "MT", "WA");
$excluded_zip = array();
$shipping_restrictions = AddExcludedAreas($excluded_country_area,
$excluded_state, $excluded_zip);
// Create a <flat-rate-shipping> option with shipping restrictions
$name = "UPS Ground";
$price = "8.50";
CreateFlatRateShipping($name, $price, $shipping_restrictions);
/*
* The call to the CreateMerchantCalculatedShipping function is commented out
* because a shopping cart can not contain a <merchant-calculated-shipping>
* option as well as other types of shipping options.
* To use <merchant-calculated-shipping> options with this demo, you would
* need to uncomment the next four lines of code and also comment out the
* calls to the CreateFlatRateShipping and CreatePickup functions.
*
* $name = "SuperShip";
* $price = "10.00";
* $shipping_restrictions = "";
* CreateMerchantCalculatedShipping($name, $price, $shipping_restrictions);
*/
// Create a <pickup> shipping option
$name = "Pickup";
$price = "0.00";
CreatePickup($name, $price);
/*
* Create tax tables for the order. Tax tables have the
* following XML structure:
* <tax-tables>
* <default-tax-table>
* <tax-rules>
* <default-tax-rule>
* <shipping-taxed>true</shipping-taxed>
* <rate>0.0825</rate>
* <tax-area>
* <!-- could also contain country or zip areas>
* <us-state-area>
* <state>NY</state>
* </us-state-area>
* </tax-area>
* </default-tax-rule>
* </tax-rules>
* </default-tax-table>
* <alternate-tax-tables>
* <alternate-tax-table>
* <alternate-tax-rules>
* <alternate-tax-rule>
* <rate>0.0825</rate>
* <tax-area>
* <!-- could also contain country or zip areas>
* <us-state-area>
* <state>NY</state>
* </us-state-area>
* </tax-area>
* </alternate-tax-rule>
* </alternate-tax-rules>
* </alternate-tax-table>
* </alternate-tax-tables>
* </tax-tables>
*
* +++ CHANGE ME +++
* You will need to update the tax tables to match those
* used to calculate taxes for your store
*/
$rate = "0.0825";
$tax_area_country = "ALL";
$tax_area = CreateTaxArea("country", $tax_area_country);
$shipping_taxed = "false";
CreateDefaultTaxRule($rate, $tax_area, $shipping_taxed);
$rate = "0.0800";
$tax_area_state = "NY";
$tax_area = CreateTaxArea("state", $tax_area_state);
$shipping_taxed = "true";
CreateDefaultTaxRule($rate, $tax_area, $shipping_taxed);
$rate = "0.0225";
$tax_area_state = "CA";
$tax_area = CreateTaxArea("state", $tax_area_state);
CreateAlternateTaxRule($rate, $tax_area);
$rate = "0.0200";
$tax_area_state = "NY";
$tax_area = CreateTaxArea("state", $tax_area_state);
CreateAlternateTaxRule($rate, $tax_area);
$standalone = "false";
$name = "food";
CreateAlternateTaxTable($standalone, $name);
$rate = "0.0500";
$tax_area_country = "FULL_50_STATES";
$tax_area = CreateTaxArea("country", $tax_area_country);
CreateAlternateTaxRule($rate, $tax_area);
$rate = "0.0600";
$tax_area_zip = "9404*";
$tax_area = CreateTaxArea("zip", $tax_area_zip);
CreateAlternateTaxRule($rate, $tax_area);
$standalone = "true";
$name = "drug";
CreateAlternateTaxTable($standalone, $name);
$merchant_calculated = "false";
CreateTaxTables($merchant_calculated);
/*
* Specify A URL to which Google Checkout should send Merchant Calculations
* API (<merchant-calculation-callback>) requests and create the
* <merchant-calculations> XML for a Checkout API request.
*
* +++ CHANGE ME +++
* If you are implementing the Merchant Calculations API, you need to
* uncomment the following lines of code, which create the
* <merchant-calculations> XML in a Checkout API response. You also
* need to update the value of the $merchant_calculations_url variable
* to the URL to which Google Checkout should send
* <merchant-calculation-callback> requests.
*/
/*
$merchant_calculations_url =
"http://www.example.com/shopping/MerchantCalculationCallback.php";
$accept_merchant_coupons = "true";
$accept_gift_certificates = "true";
CreateMerchantCalculations($merchant_calculations_url,
$accept_merchant_coupons, $accept_gift_certificates);
*/
/*
* +++ CHANGE ME +++
* The $edit_cart_url variable identifies a URL that the customer can
* link to to edit the contents of the shopping cart.
* The $continue_shopping_url variable identifies a URL that the
* customer can link to to continue shopping.
* If you are providing of these options to your customers, you need
* to insert the appropriate URLs for these variables.
* e.g. $edit_cart_url = "http://www.example.com/shopping/edit";
* $continue_shopping_url = "http://www.example.com/shop/continue";
*/
$edit_cart_url = "";
$continue_shopping_url = "";
/*
* Build the <merchant-checkout-flow-support> element in the CHeckout
* API request.
*/
CreateMerchantCheckoutFlowSupport($edit_cart_url, $continue_shopping_url);
// Get <checkout-shopping-cart> XML
$xml_cart = CreateCheckoutShoppingCart();
/*
* Post the cart XML via a server-to-server POST and
* capture the <checkout-redirect> response.
*/
$transmit_response = SendRequest($xml_cart, $GLOBALS["request_url"]);
// Process the response by redirecting the user to the checkout redirect URL
ProcessXmlData($transmit_response);
}
?>