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09.05.2008 at 05:38PM PDT, ID: 23708057
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9.2

AJAX cart - adding unit_price

Asked by freshwaterwest in PHP and Databases, Asynchronous Javascript and XML (AJAX)

Tags: ,

I have downloaded and altered a great AJAX shopping cart example which I'm trying to adapt and add to a project. The original had no database and for simplicity returned the unit_price of a fixed 9.99.
I think I've setup the main page index.php properly which adds the items/unit price a form action, but I've tried and can't seem to alter return 9.99 statement in the "shopping_cart.class.php" correctly as I am new to AJAX and have limited php knowledge.

Database is simply:

id, order_code, unit_price, item_nameStart Free Trial 
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this is the "shopping_cart.class.php"
 
.................................
 
<?php
 
class Shopping_Cart {
	var $cart_name;       // The name of the cart/session variable
	var $items = array(); // The array for storing items in the cart
	
	/**
	 * __construct() - Constructor. This assigns the name of the cart
	 *                 to an instance variable and loads the cart from
	 *                 session.
	 *
	 * @param string $name The name of the cart.
	 */
	function __construct($name) {
		$this->cart_name = $name;
		$this->items = $_SESSION[$this->cart_name];
	}
	
	/**
	 * setItemQuantity() - Set the quantity of an item.
	 *
	 * @param string $order_code The order code of the item.
	 * @param int $quantity The quantity.
	 */
	function setItemQuantity($order_code, $quantity) {
		$this->items[$order_code] = $quantity;
	}
	
	/**
	 * getItemPrice() - Get the price of an item.
	 *
	 * @param string $order_code The order code of the item.
	 * @return int The price.
	 */
	function getItemPrice($order_code) {
		// This is where the code taht retrieves prices
		// goes. We'll just say everything costs $9.99 for this tutorial.
		return 9.99;
	}
	
	/**
	 * getItemName() - Get the name of an item.
	 *
	 * @param string $order_code The order code of the item.
	 */
	function getItemName($order_code) {
		// This is where the code that retrieves product names
		// goes. We'll just return something generic for this tutorial.
		return 'My Product (' . $order_code . ')';
	}
	
	/**
	 * getItems() - Get all items.
	 *
	 * @return array The items.
	 */
	function getItems() {
		return $this->items;
	}
	
	/**
	 * hasItems() - Checks to see if there are items in the cart.
	 *
	 * @return bool True if there are items.
	 */
	function hasItems() {
		return (bool) $this->items;
	}
	
	/**
	 * getItemQuantity() - Get the quantity of an item in the cart.
	 *
	 * @param string $order_code The order code.
	 * @return int The quantity.
	 */
	function getItemQuantity($order_code) {
		return (int) $this->items[$order_code];
	}
	
	/**
	 * clean() - Cleanup the cart contents. If any items have a
	 *           quantity less than one, remove them.
	 */
	function clean() {
		foreach ( $this->items as $order_code=>$quantity ) {
			if ( $quantity < 1 )
				unset($this->items[$order_code]);
		}
	}
	
	/**
	 * save() - Saves the cart to a session variable.
	 */
	function save() {
		$this->clean();
		$_SESSION[$this->cart_name] = $this->items;
	}
}
 
?>
 
.................
 
this is the main page...
 
 
<?php require_once('../Connections/productcart.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "") 
{
  $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
 
  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
 
  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? "'" . doubleval($theValue) . "'" : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}
 
mysql_select_db($database_nutrition, $nutrition);
$query_products = "SELECT * FROM product_test";
$products = mysql_query($query_products, $nutrition) or die(mysql_error());
$row_products = mysql_fetch_assoc($products);
$totalRows_products = mysql_num_rows($products);
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
		<title>Shopping Cart</title>
		<script src="js/jquery-1.2.6.pack.js" type="text/javascript"></script>
		<script src="js/jquery.color.js" type="text/javascript"></script>
		<script src="js/thickbox.js" type="text/javascript"></script>
		<script src="js/cart.js" type="text/javascript"></script>
		<link href="css/style.css" rel="stylesheet" type="text/css" media="screen" />
		<link href="css/thickbox.css" rel="stylesheet" type="text/css" media="screen" />
		
		<script type="text/javascript">
			$(function() {
				$("form.cart_form").submit(function() {
					var title = "Your Shopping Cart";
					var orderCode = $("input[name=order_code]", this).val();
					var quantity = $("input[name=quantity]", this).val();
					var unitprice = $("input[name=unit_price]", this).val();
					var url = "cart_action.php?order_code=" + orderCode + "&quantity=" + quantity + "&unit_price=" + unitprice + "&TB_iframe=true&height=400&width=780";
					tb_show(title, url, false);
					
					return false;
				});
			});
		</script>
	</head>
	<body>
		<div id="container">
			<h1>Shopping Cart Demo</h1>
			<?php do { ?>
            
 
			  <form class="cart_form" action="cart_action.php" method="get">
			    <input type="hidden" name="order_code" value="<?php echo $row_products['order_code']; ?>" />
			    <label><?php echo $row_products['order_code']; ?>: <input class="center" type="text" name="quantity" value="1" size="3" ?></label>
			    <input type="submit" name="submit" value="Add to cart" />
		          </form>
<p></p>				  
 
 
 
<?php } while ($row_products = mysql_fetch_assoc($products)); ?></div>
</body>
</html>
<?php
mysql_free_result($products);
?>
Related Solutions: AJAX php mysql cart - different quantity banded prices
[+][-]09.05.2008 at 05:49PM PDT, ID: 22404961

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[+][-]09.05.2008 at 05:51PM PDT, ID: 22404966

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About this solution

Zones: PHP and Databases, Asynchronous Javascript and XML (AJAX)
Tags: AJAX php mysql, Firefox 3, Safari, Explorer 7
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Solution Provided By: hielo
Participating Experts: 1
Solution Grade: A
 
 
[+][-]09.05.2008 at 06:07PM PDT, ID: 22405066

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[+][-]09.05.2008 at 06:17PM PDT, ID: 22405100

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[+][-]09.05.2008 at 06:47PM PDT, ID: 22405167

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