我想知道是否有人可以帮助我。我遇到了产品未添加到我的购物车的问题。我想知道是否有人可以帮助我或发现我的代码中的任何错误。感谢您的帮助，您可以对大量代码感到抱歉。
汽车价格（在我的数据库中显示我所有的汽车）
<head>
<title>Car Prices</title>
<!--main.css stylesheet involves the positioning of the website and effects that have been applied to the website-->
<!--slider.css stylsheet involves the positioning the size and the time frame of the slideshow that have been created-->
<!--menu.css stylesheet involves the form of navigation and the styles that have been applied to that horizontal navigation bar-->
<link href="css/main2.css" rel="stylesheet" type="text/css" />
<link href="css/slider.css" rel="stylesheet" type="text/css" />
<link href="css/menu.css" rel="stylesheet" type="text/css" />
</head>
<body>
<span class = "title1">Prestige Supercars Car Price</span>
<div id = "header1">
<!-- as i wanted the button to be wrapped with the text on top i had to wrap the text over the button-->
<?php
require "dbc.php";
$query = "SELECT * from cars";
$result = mysql_query ($query);
$rCount = mysql_num_rows($result);
$aresult = array();
$aresult = mysql_fetch_array($result);
while($row = mysql_fetch_array($result)){
$CID = $row ["id"];
echo'<div id="content7">
<div class="car-image"><a href="carinformation.php?id='.$row["id"]. '"><img width="500px" height="200px" src="data:image/jpeg;base64,'. base64_encode($row["picture"]). '" />';
echo '<div id="title2">'.$row ["Car_Name"];
echo '<br />Price: £'.$row ["Price"];
echo '</div>';
'<input name="viewdetails" type="submit" value="More" onClick="">';
}
?>
汽车信息（指定一辆车）
<?php
$carid = $_GET['id'];
require_once "dbc.php";
$result = mysql_query('SELECT * FROM cars WHERE id = "'.$carid.'"');
$rCount = mysql_num_rows($result);
?>
<?php
if($row = mysql_fetch_array($result)){
do{
$CID = $row ["id"];
echo '<div id="content8"><form name="userForm" method="post" action="cart.php?cid='.$row['id'].'">';
echo '<div class="car-image"><a href="carinformation.php?id='.$row["id"]. '"><img width="500px" height="200px" src="data:image/jpeg;base64,'. base64_encode($row["picture"]). '" />';
echo '<div id="title2">'.$row ["Car_Name"];
echo '<br />Quantity: '.$row ["Quantity"];
echo '<br />Price: £'.$row ["Price"];
echo '<br/><input name="addCart" type="submit" value="ADD TO CART" onClick="">';
echo '</form></div>';
echo '<br/><br/><br/><br/><br/>';
}while($row = mysql_fetch_array($result));
}else{print"Sorry, no records where found!";}
?>
</body>
</html>
大车
<!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">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<!-- Presige Supercars -->
<head>
<title>Prestige Cars Cart</title>
</head>
<?php
//if product exists in command line, add it to cart
@ $cid = $_GET['cid'];
//checks if command line has product added
if($cid){
//checks if cart is empty & creates it
if(!isset($_SESSION['cart'])){
$_SESSION['cart'] = array();
$_SESSION['items'] = 0;
$_SESSION['total_price'] = '0.00';
}
//cart array contains car id & quantity
if (isset($_SESSION['cart'] [$cid] ))
$_SESSION['cart'] [$cid]++;
else
$_SESSION['cart'] [$cid] = 1;
}
//checks if command line has product updated
if(isset($_POST['update'])){
foreach ($_SESSION['cart'] as $carid => $qty){
//value from text box name
if($_POST[$carid]<='0')
unset($_SESSION['cart'] [$carid]);
else
$_SESSION['cart'] [$carid] = $_POST[$carid];
}
}
?>
<?php
session_start();
?>
<?php
//displays car
if ($_SESSION['cart']){
//echo '<h3>Cart Contents</h3>';
echo '<div id="content7">';
echo '<table width="600" border="0" cellpadding=1 cellspacing=3>';
echo '<form name="userForm" method="post" action="cart.php">';
echo '<tr><th width="300" scope="col" align="center">Title</th>';
echo '<th width="100" align="right">Quantity</th>';
echo '<th width="150" align="right">Price</th></tr>';
$_SESSION['total_price'] = '0.00';
$_SESSION['items'] = 0;
//place lines of products in page
foreach ($_SESSION['cart'] as $carid => $qty){
//Connect to your Database Server with your credentials
require "dbc.php";
$query = 'SELECT * FROM cars WHERE id = "'.$carid.'"';
$result = mysql_query($query);
$catNo = mysql_num_rows($result);
$aresult = array();
$product = mysql_fetch_array($result);
$tprice = $qty*$product['Price'];
echo '<tr><td align = "left"><span>';
echo $product['Car_Name'];
echo '</span></td>';
echo '<td align = "right"><span>';
//name of textbox=carid and value=qty
echo '<input name="'.$carid.'" type="text" size="3" maxlength="3" value="'.$qty.'">';
echo '</span></td>';
echo '<td align = "right"><span>£';
echo $tprice;
echo '</span></td></tr>';
$_SESSION['items'] += $qty;
$_SESSION['total_price'] += $tprice;
//close the connection
mysql_close($conn);
}
echo '<input type="hidden" name="update" value=true>';
echo '<tr bgcolor="yellow"><td align="center">';
echo '<input type="submit" name="Submit" value="Update Cart"></td>';
echo '<td align = "right"><b>Total Qty: '.$_SESSION['items'].'</b></td>';
echo '<td align="right"><b>Total: £'.$_SESSION['total_price'].'</b></td>';
echo '</tr>';
echo '</table>';
echo '</form>';
echo '<br/><br/>';
echo '<form action="pay.php" method="post">';
echo '<input type="submit" name="CHECKOUT" value="CHECKOUT"></form>';
//echo '</div>';
}else{ //if no product in cart
echo '<div id="content7">';
echo '<h3><span>You currently have no products in Shopping Cart.</span></h3>';
echo '<p class="p1"><span></span></p>';
//echo '</div>';
}
?>
</body>
</html>