<pre> 
&lt;?php

    error_reporting(E_ALL ^ E_WARNING ^ E_NOTICE);      //all error but warnigns & notices

    $userCookie = $_COOKIE['userName'];                 //obtain user cookie

    if (! $userCookie)                                                      //if no username cookie
        header('Location: /~sultans/php/demo/5session/cookieLogin.php');    //redirect to login page

    if ($_POST['add'])                      //if add button is pressed
        add_to_cart();

    if ($_POST['view'])                     //if view button is pressed
        view_cart();

    display();
    
//===========================================================================================
// Add item to a shopping cart 
//===========================================================================================
function add_to_cart()
{
	global $html;

	$newItem  = $_POST['item'];                 //get all form fields
    $newValue = $_POST['value'];

	if (! $newItem)  return;                    //if none is given, return
	if (! $newValue) $newValue = 1;             //if none is given, set to 1

    $cart = get_cart('myCart');                 //get the cart from a cookie

	$cart[$newItem] = $newValue;                //add the newest item to cart    

    $expiration = time() + 7 * 24*60*60;        //7 days from now 

    set_cart($cart,'myCart',$expiration);       //save the cart in a cookie 

    $html = "&lt;b>$newValue $newItem &lt;/b>have been added to your shopping cart";	
}

//===========================================================================================
// Display entire shopping cart 
//===========================================================================================
function view_cart()
{
	global $html;

    $cart = get_cart('myCart');				    //get the cart from a cookie

	$html  = "&lt;table border=2 bgcolor=f0f0f0> \n";
	$html .= "&lt;tr bgcolor=cyan>&lt;th>&lt;i>Item Name&lt;th>&lt;i>Quantity&lt;/th> \n";

	foreach ($cart as $itemName => $itemValue)                  //for every item in the cart
    	    $html .= "&lt;tr>&lt;td>$itemName &lt;td>$itemValue \n";     //print the item name and value

	$html .= "&lt;tr>&lt;td colspan=2 bgcolor=cyan>&lt;b>". count($cart) ."&lt;/b> items in cart";
	$html .= "&lt;/table>";
}

//===========================================================================================
// Get shopping cart from a cookie and build/return a cart object 
//===========================================================================================
function get_cart($cartName)
{
    $cart = Array();                            //empty cart object					

    $cart_string = $_COOKIE[$cartName];         //get shopping cart from the cooklie    
    $cart_array  = explode('|',$cart_string);   //split string cart on |

    foreach ($cart_array as $item)              //for every item in the cart array
    {
        $item = explode(':',$item);             //split each item on :
    	$itemName  = $item[0];
    	$itemValue = $item[1];

        if ($itemName)                          //if there is an item
    	    $cart[$itemName] = $itemValue;      //add it with its value to the cart object
    }    

    return($cart);					//return the shopping cart object
}	

//===========================================================================================
// Take a shopping cart object and store it in a cookie
//===========================================================================================
function set_cart($cart,$cartName,$expiration)
{
    foreach ($cart as $itemName => $itemValue)              //for every item in the cart
    {
        $cart_array[$i++] = $itemName .':'. $itemValue;     //join each item name/value with :
    }    

    $cart_string = implode('|',$cart_array);                //join all items with | 

    setcookie($cartName, $cart_string, $expiration, '/');   //save the cart in a cookie 
}	

//===========================================================================================
function display()
{
	global $html;
?>
	&lt;html>
	&lt;head>
	&lt;title>Cookie Check&lt;/title>
	&lt;/head>

	&lt;body bgcolor=lightyellow>
	&lt;h1 align=center>Welcome to our Store &lt;?php echo $_COOKIE['userName']?>&lt;/h1>
	&lt;h3>We Sell...&lt;/h3>
	&lt;table cellpadding=2>
	&lt;tr bgcolor=cccccc>&lt;td>Apples&lt;td>Pears&lt;td>Oranges&lt;td>Grapes&lt;td>Strawberries&lt;td>Bananas&lt;td>Apricots&lt;td>Peaches&lt;/tr> 
	&lt;tr bgcolor=cccccc>&lt;td>Tables&lt;td>Chairs&lt;td>Lamps&lt;td>Desks&lt;td>Wall Units&lt;td>Chests&lt;td>Sofas&lt;td>Beds&lt;/tr>
	&lt;tr bgcolor=cccccc>&lt;td>TVs&lt;td>DVDs&lt;td>iPhones&lt;td>iPods&lt;td>Computers&lt;td>Monitors&lt;td>Printers&lt;td>Scanners&lt;/tr>
	&lt;/table>
	And much much more...
	&lt;h3>Add any item to your shopping cart&lt;/h3>
	&lt;form method=post name=frm action=&lt;?php echo $_SERVER['PHP_SELF'] ?> >
	&lt;table>
	&lt;tr>&lt;td>Enter item to your cart&lt;td> &lt;input type=text name=item>
	&lt;tr>&lt;td>Enter quantity&lt;td>&lt;input type=text name=value>
	&lt;/table>
	&lt;br>
	&lt;input type=submit name=add  value="Add to Cart">
	&lt;input type=submit name=view value="View Cart">
	&lt;/form>
	&lt;hr>
&lt;?php
	print $html;
}
?>

&lt;?php include "../include.php"; ?>		&lt;!-- hyperlink to see the code -->
&lt;/body>
&lt;/html>
</pre>