Jcart....Help converting orking paypal gateway.php to google check out

[southpaw1]

Hey guys really want to use this Jcart script with my google account.

 

I have a working paypal gateway.php attached... can anyone give me any ideas or has had experience how i go about converting it to google check out. Thanks.

 

<?php

// JCART v1.1
// http://conceptlogic.com/jcart/

// THIS FILE IS CALLED WHEN ANY BUTTON ON THE CHECKOUT PAGE (PAYPAL CHECKOUT, UPDATE, OR EMPTY) IS CLICKED
// WE CAN ONLY DEFINE ONE FORM ACTION, SO THIS FILE ALLOWS US TO FORK THE FORM SUBMISSION DEPENDING ON WHICH BUTTON WAS CLICKED
// ALSO ALLOWS US TO VERIFY PRICES BEFORE SUBMITTING TO PAYPAL

// INCLUDE JCART BEFORE SESSION START
include_once 'jcart.php';

// START SESSION
session_start();

// INITIALIZE JCART AFTER SESSION START
$cart =& $_SESSION['jcart']; if(!is_object($cart)) $cart = new jcart();

// WHEN JAVASCRIPT IS DISABLED THE UPDATE AND EMPTY BUTTONS ARE DISPLAYED
// RE-DISPLAY THE CART IF THE VISITOR CLICKS EITHER BUTTON
if ($_POST['jcart_update_cart']  || $_POST['jcart_empty'])
{

// UPDATE THE CART
if ($_POST['jcart_update_cart'])
	{
	$cart_updated = $cart->update_cart();
	if ($cart_updated !== true)
		{
		$_SESSION['quantity_error'] = true;
		}
	}

// EMPTY THE CART
if ($_POST['jcart_empty'])
	{
	$cart->empty_cart();
	}

// REDIRECT BACK TO THE CHECKOUT PAGE
header('Location: ' . $_POST['jcart_checkout_page']);
exit;
}

// THE VISITOR HAS CLICKED THE PAYPAL CHECKOUT BUTTON
else
{

///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////
/*

A malicious visitor may try to change item prices before checking out,
either via javascript or by posting from an external script.

Here you can add PHP code that validates the submitted prices against
your database or validates against hard-coded prices.

The cart data has already been sanitized and is available thru the
$cart->get_contents() function. For example:

foreach ($cart->get_contents() as $item)
	{
	$item_id	= $item['id'];
	$item_name	= $item['name'];
	$item_price	= $item['price'];
	$item_qty	= $item['qty'];
	}

*/
///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////

$valid_prices = true;

///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////

// IF THE SUBMITTED PRICES ARE NOT VALID
if ($valid_prices !== true)
	{
	// KILL THE SCRIPT
	die($jcart['text']['checkout_error']);
	}

// PRICE VALIDATION IS COMPLETE
// SEND CART CONTENTS TO PAYPAL USING THEIR UPLOAD METHOD, FOR DETAILS SEE http://tinyurl.com/djoyoa
else if ($valid_prices === true)
	{
	// PAYPAL COUNT STARTS AT ONE INSTEAD OF ZERO
	$paypal_count = 1;
	$items_query_string;
	foreach ($cart->get_contents() as $item)
		{
		// BUILD THE QUERY STRING
		$items_query_string .= '&item_name_' . $paypal_count . '=' . $item['name'];
		$items_query_string .= '&amount_' . $paypal_count . '=' . $item['price'];
		$items_query_string .= '&quantity_' . $paypal_count . '=' . $item['qty'];
		$items_query_string .= '&shipping_' . $paypal_count . '=' . "5.20";
		// INCREMENT THE COUNTER
		++$paypal_count;
		}

	// EMPTY THE CART
	$cart->empty_cart();

	if($jcart['paypal_id'])
		{
		// REDIRECT TO PAYPAL WITH MERCHANT ID AND CART CONTENTS
		header( 'Location: https://www.paypal.com/cgi-bin/webscr?cmd=_cart&upload=1&business=' . $jcart['paypal_id'] . $items_query_string. '&currency_code=GBP');
		exit;
		}
	else
		// THE USER HAS NOT CONFIGURED A PAYPAL ID
		// DISPLAY THE PAYPAL URL WITH AN ERROR MESSAGE
		{
		echo 'PayPal integration requires a secure merchant ID. Please see the <a href="http://conceptlogic.com/jcart/install.php">installation instructions</a> for more info.<br /><br />';
		echo 'Below is the URL that would be sent to PayPal if a merchant ID was set in <strong>jcart-config.php</strong>:<br /><br />';
		echo 'https://www.paypal.com/cgi-bin/webscr?cmd=_cart&upload=1&business=PAYPAL_ID' . $items_query_string;
		exit;
		}
	}
}

?>