Web Guru...: Simple Shopping Cart in php

index.php
<?php
// Include MySQL class
require_once('inc/mysql.class.php');
// Include database connection
require_once('inc/global.inc.php');
// Include functions
require_once('inc/functions.inc.php');
// Start the session
session_start();
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
    <title>PHP Shopping Cart Demo · Bookshop</title>
    <link rel="stylesheet" href="css/styles.css" />
</head>

<body>

<div id="shoppingcart">

<h1>Your Shopping Cart</h1>

<?php
echo writeShoppingCart();
?>

</div>

<div id="booklist">

<h1>Books In Our Store</h1>

<?php
$sql = 'SELECT * FROM books ORDER BY id';
$result = $db->query($sql);
$output[] = '<ul>';
while ($row = $result->fetch()) {
    $output[] = '<li>"'.$row['title'].'" by '.$row['author'].': £'.$row['price'].'<br /><a href="cart.php?action=add&id='.$row['id'].'">Add to cart</a></li>';
}
$output[] = '</ul>';
echo join('',$output);
?>

</div>

</body>
</html>

cart.php
<?php
// Include MySQL class
require_once('inc/mysql.class.php');
// Include database connection
require_once('inc/global.inc.php');
// Include functions
require_once('inc/functions.inc.php');
// Start the session
session_start();
// Process actions
$cart = $_SESSION['cart'];
$action = $_GET['action'];
switch ($action) {
    case 'add':
        if ($cart) {
            $cart .= ','.$_GET['id'];
        } else {
            $cart = $_GET['id'];
        }
        break;
    case 'delete':
        if ($cart) {
            $items = explode(',',$cart);
            $newcart = '';
            foreach ($items as $item) {
                if ($_GET['id'] != $item) {
                    if ($newcart != '') {
                        $newcart .= ','.$item;
                    } else {
                        $newcart = $item;
                    }
                }
            }
            $cart = $newcart;
        }
        break;
    case 'update':
    if ($cart) {
        $newcart = '';
        foreach ($_POST as $key=>$value) {
            if (stristr($key,'qty')) {
                $id = str_replace('qty','',$key);
                $items = ($newcart != '') ? explode(',',$newcart) : explode(',',$cart);
                $newcart = '';
                foreach ($items as $item) {
                    if ($id != $item) {
                        if ($newcart != '') {
                            $newcart .= ','.$item;
                        } else {
                            $newcart = $item;
                        }
                    }
                }
                for ($i=1;$i<=$value;$i++) {
                    if ($newcart != '') {
                        $newcart .= ','.$id;
                    } else {
                        $newcart = $id;
                    }
                }
            }
        }
    }
    $cart = $newcart;
    break;
}
$_SESSION['cart'] = $cart;
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
    <title>PHP Shopping Cart Demo · Cart</title>
    <link rel="stylesheet" href="css/styles.css" />
</head>

<body>

<div id="shoppingcart">

<h1>Your Shopping Cart</h1>

<?php
echo writeShoppingCart();
?>

</div>

<div id="contents">

<h1>Please check quantities...</h1>

<?php
echo showCart();
?>

<p><a href="index.php">Back to bookshop...</a></p>

</div>

</body>
</html>

functions.inc.php

<?php

function writeShoppingCart() {
    $cart = $_SESSION['cart'];
    if (!$cart) {
        return '<p>You have no items in your shopping cart</p>';
    } else {
        // Parse the cart session variable
        $items = explode(',',$cart);
        $s = (count($items) > 1) ? 's':'';
        return '<p>You have <a href="cart.php">'.count($items).' item'.$s.' in your shopping cart</a></p>';
    }
}

function showCart() {
    global $db;
    $cart = $_SESSION['cart'];
    if ($cart) {
        $items = explode(',',$cart);
        $contents = array();
        foreach ($items as $item) {
            $contents[$item] = (isset($contents[$item])) ? $contents[$item] + 1 : 1;
        }
        $output[] = '<form action="cart.php?action=update" method="post" id="cart">';
        $output[] = '<table>';
        foreach ($contents as $id=>$qty) {
            $sql = 'SELECT * FROM books WHERE id = '.$id;
            $result = $db->query($sql);
            $row = $result->fetch();
            extract($row);
            $output[] = '<tr>';
            $output[] = '<td><a href="cart.php?action=delete&id='.$id.'" class="r">Remove</a></td>';
            $output[] = '<td>'.$title.' by '.$author.'</td>';
            $output[] = '<td>£'.$price.'</td>';
            $output[] = '<td><input type="text" name="qty'.$id.'" value="'.$qty.'" size="3" maxlength="3" /></td>';
            $output[] = '<td>£'.($price * $qty).'</td>';
            $total += $price * $qty;
            $output[] = '</tr>';
        }
        $output[] = '</table>';
        $output[] = '<p>Grand total: <strong>£'.$total.'</strong></p>';
        $output[] = '<div><button type="submit">Update cart</button></div>';
        $output[] = '</form>';
    } else {
        $output[] = '<p>You shopping cart is empty.</p>';
    }
    return join('',$output);
}
?>

Web Guru...

Monday, June 11, 2012

Simple Shopping Cart in php

No comments:

Post a Comment

Popular Posts

Total Pageviews

Categories