PHP和SQL购物车未将产品添加到购物车

Question

I am trying to make a simple MSSQL and PHP shopping cart for my website. 我正在尝试为我的网站制作一个简单的MSSQL和PHP购物车。 The page index.php correctly retrieves the products from my MSSQL products table and displays them. 页面index.php从我的MSSQL products表中正确检索products并显示它们。 For each product displayed there is an Add to Cart button. 对于显示的每个产品，都有一个“ Add to Cart按钮。 The button should use $_SESSION to store the added product into the shopping cart via the cart_update.php page. 该按钮应使用$_SESSION通过cart_update.php页面将添加的产品存储到购物车中。 The products added to the shopping cart should be displayed at the bottom of the index.php page. 添加到购物车中的产品应显示在index.php页面的底部。 Currently, when the Add to Cart button is hit, no products are added to the shopping cart. 当前，当点击Add to Cart按钮时，没有产品添加到购物车。 I am unsure why this is happening. 我不确定为什么会这样。

Here is my index.php page code: 这是我的index.php页面代码：

<?php
session_start();
include_once("config.php");
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
</head>

<body>
<div class="products">
<?php
//current URL of the Page. cart_update.php redirects back to this URL
$current_url = base64_encode("http://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']);
    $query = "SELECT * FROM products ORDER BY id ASC";
    $results = mssql_query($query, $mysqli);
    if ($results) { 
        //output results from database
        while($obj = mssql_fetch_object($results))
        {

            echo '<div class="product">'; 
            echo '<form method="post" action="cart_update.php">';
            echo '<div class="product-thumb"><img src="images/'.$obj->product_img_name.'"></div>';
            echo '<div class="product-content"><h3>'.$obj->product_name.'</h3>';
            echo '<div class="product-desc">'.$obj->product_desc.'</div>';
            echo '<div class="product-info">Price '.$currency.$obj->price.' <button class="add_to_cart">Add To Cart</button></div>';
            echo '</div>';
            echo '<input type="hidden" name="product_code" value="'.$obj->product_code.'" />';
            echo '<input type="hidden" name="type" value="add" />';
            echo '<input type="hidden" name="return_url" value="'.$current_url.'" />';
            echo '</form>';
            echo '</div>';
        }

}
?>
</div>
<div class="shopping-cart">
<h2>Your Shopping Cart</h2>
<?php
if(isset($_SESSION["products"]))
{
    $total = 0;
    echo '<ol>';
    foreach ($_SESSION["products"] as $cart_itm)
    {
        echo '<li class="cart-itm">';
        echo '<span class="remove-itm"><a href="cart_update.php?removep='.$cart_itm["code"].'&return_url='.$current_url.'">&times;</a></span>';
        echo '<h3>'.$cart_itm["name"].'</h3>';
        echo '<div class="p-code">P code : '.$cart_itm["code"].'</div>';
        echo '<div class="p-qty">Qty : '.$cart_itm["qty"].'</div>';
        echo '<div class="p-price">Price :'.$currency.$cart_itm["price"].'</div>';
        echo '</li>';
        $subtotal = ($cart_itm["price"]*$cart_itm["qty"]);
        $total = ($total + $subtotal);
    }
    echo '</ol>';
    echo '<span class="check-out-txt"><strong>Total : '.$currency.$total.'</strong> <a href="view_cart.php">Check-out!</a></span>';
    echo '<span class="empty-cart"><a href="cart_update.php?emptycart=1&return_url='.$current_url.'">Empty Cart</a></span>';
}else{
    echo 'Your Cart is empty';
}
?>
</div>
</body>
</html>

And here is my cart_update.php page code: 这是我的cart_update.php页面代码：

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
</head>

<body>
<?php
session_start(); //start session
include_once("config.php"); //include config file

//empty cart by distroying current session
if(isset($_GET["emptycart"]) && $_GET["emptycart"]==1)
{
    $return_url = base64_decode($_GET["return_url"]); //return url
    session_destroy();
    header('Location:'.$return_url);
}

//add item in shopping cart
if(isset($_POST["type"]) && $_POST["type"]=='add')
{
    $product_code   = filter_var($_POST["product_code"], FILTER_SANITIZE_STRING); //product code
    $product_qty    = filter_var($_POST["product_qty"], FILTER_SANITIZE_NUMBER_INT); //product code
    $return_url     = base64_decode($_POST["return_url"]); //return url

    //limit quantity for single product
    if($product_qty > 10){
        die('<div align="center">This demo does not allowed more than 10 quantity!<br /><a href="http://sanwebe.com/assets/paypal-shopping-cart-integration/">Back To Products</a>.</div>');
    }
    $query = "SELECT product_name,price FROM products WHERE product_code='$product_code' LIMIT 1";
    //MySqli query - get details of item from db using product code
    $results = mssql_query($query, $mysqli);
    $obj = mssql_fetch_object($results);

    if ($results) { //we have the product info 

        //prepare array for the session variable
        $new_product = array(array('name'=>$obj->product_name, 'code'=>$product_code, 'qty'=>$product_qty, 'price'=>$obj->price));

        if(isset($_SESSION["products"])) //if we have the session
        {
            $found = false; //set found item to false

            foreach ($_SESSION["products"] as $cart_itm) //loop through session array
            {
                if($cart_itm["code"] == $product_code){ //the item exist in array

                    $product[] = array('name'=>$cart_itm["name"], 'code'=>$cart_itm["code"], 'qty'=>$product_qty, 'price'=>$cart_itm["price"]);
                    $found = true;
                }else{
                    //item doesn't exist in the list, just retrive old info and prepare array for session var
                    $product[] = array('name'=>$cart_itm["name"], 'code'=>$cart_itm["code"], 'qty'=>$cart_itm["qty"], 'price'=>$cart_itm["price"]);
                }
            }

            if($found == false) //we didn't find item in array
            {
                //add new user item in array
                $_SESSION["products"] = array_merge($product, $new_product);
            }else{
                //found user item in array list, and increased the quantity
                $_SESSION["products"] = $product;
            }

        }else{
            //create a new session var if does not exist
            $_SESSION["products"] = $new_product;
        }

    }

    //redirect back to original page
    header('Location:'.$return_url);
}

//remove item from shopping cart
if(isset($_GET["removep"]) && isset($_GET["return_url"]) && isset($_SESSION["products"]))
{
    $product_code   = $_GET["removep"]; //get the product code to remove
    $return_url     = base64_decode($_GET["return_url"]); //get return url


    foreach ($_SESSION["products"] as $cart_itm) //loop through session array var
    {
        if($cart_itm["code"]!=$product_code){ //item does,t exist in the list
            $product[] = array('name'=>$cart_itm["name"], 'code'=>$cart_itm["code"], 'qty'=>$cart_itm["qty"], 'price'=>$cart_itm["price"]);
        }

        //create a new product list for cart
        $_SESSION["products"] = $product;
    }

    //redirect back to original page
    header('Location:'.$return_url);
}
?>
</body>
</html>

Thank you for any help. 感谢您的任何帮助。 All help is greatly appreciated. 非常感谢所有帮助。

Answer 1

To add products to the shopping cart I had to change the query in the cart_update.php page where 要将产品添加到购物车，我必须在cart_update.php页面中更改查询，其中

$query = "SELECT product_name,price FROM products WHERE product_code='$product_code LIMIT 1'";

to 至

$query = "SELECT TOP 1 product_name,price FROM products WHERE product_code='$product_code'";

This is because LIMIT does not work in SQL Server, and the equivalent is TOP . 这是因为LIMIT在SQL Server中不起作用，并且等效为TOP 。

PHP和SQL购物车未将产品添加到购物车

问题描述

1 个解决方案

解决方案1
1 已采纳 2014-03-03 17:26:37

PHP和SQL购物车未将产品添加到购物车

问题描述

1 个解决方案

解决方案1 1 已采纳 2014-03-03 17:26:37

解决方案1
1 已采纳 2014-03-03 17:26:37