/cart.php

## cart.php
<?php
require_once 'lib.php';

redirect_if_offline();
/******************************************************
 Write code to grab item ID and quantity GET parameters
 Validate that item and quantity are valid integers
 *****************************************************/
$quantity = $_GET['quantity'];
$itemID = $_GET['item'];
$quantCheck = 0;
$itemCheck = 0;
session_start();
$_SESSION['cart'] = array();

if (is_numeric($quantity))
{
    echo "IN!";
    $quant = intval($quantity);
    if ($quant > 0)
    {
        $quantCheck = 1;
    }
    echo $quantCheck;
}
if (is_numeric($itemID))
{
  $itemID = intval($itemID);
  if ($itemID > -1 && $itemID < 10)
  {
     $itemCheck = 1;
  }
  echo $itemCheck;
}
if ($quantCheck == 1 && $itemCheck == 1)
{
    echo "IN!";
  $_SESSION['cart'][$itemID][0] = $itemID;
  $_SESSION['cart'][$itemID][1] = $quant;
 // echo $_SESSION['cart'][$itemID][0];

}
?>

<html>

<head>
<link rel="stylesheet" type="text/css" href="style.css" />
</head>

<body>
<div id="wrapper">
<?php require_once 'left.php'; ?>
<div id="main">

<h2>Your Shopping Cart</h2>

<table>
<tr><th>Item</th><th>Qty</th><th>Price</th></tr>
<?php
/******************************************************
 Display a table of items, quantities, and subtotal for
 each item. Output the total cost below.
 *****************************************************/
$price = 0;
foreach ($_SESSION['cart'] as $itemID => $qty) {
    echo $itemID;
?>
    <tr> <td><?php echo $items[$itemID][0] ?> </td><td> <?php
   echo $qty[1]?></td><td> <?php
   echo $items[$itemID][1]*$qty[1] ?> </td></tr> <?php
      $price = $price + $items[$itemID][1]*$qty[1];
     }
?>
<tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>
<tr><td>Total</td><td>&nbsp;</td><td>$<?php echo $price ?></td></tr>
</table>

</div>
</div>
</body>

</html>


## store.php
<?php
require_once 'lib.php';

redirect_if_offline();
?>

<html>

<head>
<link rel="stylesheet" type="text/css" href="style.css" />
</head>

<body>
<div id="wrapper">
<?php require_once 'left.php'; ?>
<div id="main">

<h2>PHP Store Demo</h2>
<br />
<?php
/******************************************************
 - Validate the item ID:
 - If there is no item ID specified, display a welcome message.
 - If an item ID is not valid, display an error message.
 - If it is a valid item ID, display the item name and price,
   and provide a form to add items to the cart.
 - hint: your form should use GET, and there needs to be
   a hidden form element with the item ID. Example:
   <input type='hidden' name='item' value='<?php echo $itemID; ?>' />
   *****************************************************/
if (isset($_GET['item']))
{
    $item = $_GET['item'];
    if (is_numeric($item) )
    {
        $itemID = intval($item);
        if ($itemID > 0 || $itemID == 0 && $itemID < 10)
        {
            if ($items[$item][0] != NULL)
            {
            echo $items[$item][0];
            echo "<br/> Price: ". $items[$item][1] . "<br/>" ;
?>
            <form action ="cart.php" method="get">
            Quantity: <input type="text" name="quantity" id="Quantity">
            Add to Cart: <input type = "Submit" value="Submit" id="Add to Cart">
            <input type='hidden' name='item' value='<?php echo $itemID; ?>' />
<?php
            }
            else
            {
                echo "INVALID ITEM ID!";
            }
        }
        else if ($itemID)
        {
            echo "INVALID ITEM ID!";
        }
    }
    else
    {
     echo "INVALID ITEM ID!";
    }
}
else
{
  echo " Weclome to the store! Thank you for shopping with us! \n\n";
}
?>

</div>
</div>
</body>

</html>
	<?php
	require_once 'lib.php';

	redirect_if_offline();
	/******************************************************
	Write code to grab item ID and quantity GET parameters
	Validate that item and quantity are valid integers
	*****************************************************/
	$quantity = $_GET['quantity'];
	$itemID = $_GET['item'];
	$quantCheck = 0;
	$itemCheck = 0;
	session_start();
	$_SESSION['cart'] = array();

	if (is_numeric($quantity))
	{
	echo "IN!";
	$quant = intval($quantity);
	if ($quant > 0)
	{
	$quantCheck = 1;
	}
	echo $quantCheck;
	}
	if (is_numeric($itemID))
	{
	$itemID = intval($itemID);
	if ($itemID > -1 && $itemID < 10)
	{
	$itemCheck = 1;
	}
	echo $itemCheck;
	}
	if ($quantCheck == 1 && $itemCheck == 1)
	{
	echo "IN!";
	$_SESSION['cart'][$itemID][0] = $itemID;
	$_SESSION['cart'][$itemID][1] = $quant;
	// echo $_SESSION['cart'][$itemID][0];

	}
	?>

	<html>

	<head>
	<link rel="stylesheet" type="text/css" href="style.css" />
	</head>

	<body>
	<div id="wrapper">
	<?php require_once 'left.php'; ?>
	<div id="main">

	<h2>Your Shopping Cart</h2>

	<table>
	<tr><th>Item</th><th>Qty</th><th>Price</th></tr>
	<?php
	/******************************************************
	Display a table of items, quantities, and subtotal for
	each item. Output the total cost below.
	*****************************************************/
	$price = 0;
	foreach ($_SESSION['cart'] as $itemID => $qty) {
	echo $itemID;
	?>
	<tr> <td><?php echo $items[$itemID][0] ?> </td><td> <?php
	echo $qty[1]?></td><td> <?php
	echo $items[$itemID][1]*$qty[1] ?> </td></tr> <?php
	$price = $price + $items[$itemID][1]*$qty[1];
	}
	?>
	<tr><td> </td><td> </td><td> </td></tr>
	<tr><td>Total</td><td> </td><td>$<?php echo $price ?></td></tr>
	</table>

	</div>
	</div>
	</body>

	</html>