我正在尝试创建一个简单的电子商务网站。一切进展顺利但我只能在index.php时在我的购物车上添加产品。当我尝试点击add_cart页面上的all_products.php按钮时，它会将我重定向到index.php页面，并且不会将产品添加到购物车。
我希望能够在all_products.php页面上添加产品。我的代码有什么问题：
function.php（创建“添加到购物车”按钮的功能以及点击添加到购物车按钮时会发生什么的功能：
function getProd(){
if(!isset($_GET['cat'])){
global $con;
$get_prod = "select * from item order by RAND() LIMIT 0, 6";
$run_prod = mysqli_query($con, $get_prod);
while($row_prod = mysqli_fetch_array($run_prod)){
$prod_id = $row_prod['ItemId'];
$prod_name = $row_prod['ItemName'];
$prod_desc = $row_prod['ItemDesc'];
$prod_price = $row_prod['ItemPrice'];
$prod_qty = $row_prod['ItemQty'];
$prod_cat = $row_prod['ItemCat'];
$prod_img = $row_prod['ItemImg'];
echo "
<div id='single_product'>
<img src='../admin_int/product_images/$prod_img' width='180' height=180'/>
<h4>Name:</h4><h4> $prod_name</h4>
<p><b>Price: $ $prod_price</b></p>
<a href='details.php?prod_id=$prod_id' style='float:left; font-size:19px;padding-top:10px;text-decoration:none'>Details</a>
<a href='index.php?add_cart=$prod_id'><button style = 'float:right; border:1; border-radius:12px; color:blue;
height:50px; width:50px;
background-color: #80ff80'>
Add to Cart</button></a> //THIS IS THE CREATION OF ADD TO CART BUTTON
</div>
";
}
}// if(!isset($_GET['cat'])){
}//END OF getProd()
cart() //这就是add to cart按钮的功能。
function cart(){
if(isset($_GET['add_cart']))
{
global $con;
$ip = getIp();
$pro_id = $_GET['add_cart'];
$check_pro = "select * from cart where ip_add = '$ip' AND p_id = '$prod_id" ;
$run_check = mysqli_query($con, $check_pro);
if(mysqli_num_rows($run_check)>0){
echo "";
}
else {
$insert_pro = "insert into cart (orderId,ip_add) values ('$pro_id','$ip')";
$run_pro = mysqli_query($con, $insert_pro);
echo "<script> window.open('all_products.php','_self')</script>";
}
}
}//cart()
all_products.php
<!DOCTYPE html>
<?php
include("../functions/function.php");
?>
<html>
<head>
<title>Online Shop</title>
<link rel='stylesheet' href='../CSS/style.css' media="all"/>
</head>
<body>
<!--Main Wrapper starts here!-->
<div class="main_wrapper">
<!--Header Wrapper starts here!-->
<div class="header_wrapper" >
<a href='index.php'><img id="logo" src="../Pictures/logo.png"/></a>
</div>
<!--Header ends here!-->
<!--Menu Bar starts here!-->
<div class="menubar">
<ul id="menu">
<li><a href="index.php"> Home </a></li>
<li><a href="all_products.php"> All Products </a></li>
<li><a href="customer/my_account.php"> My Account </a></li>
<li><a href=""> Sign Up </a></li>
<li><a href="cart.php"> Shopping Cart </a></li>
<li><a href="#"> Contact Us </a></li>
</ul>
<div id="form">
<form method="get" action="results.php" enctype="multipart/form-data">
<input type="text" name="user_query" placeholder="Search Product"/>
<input type="submit" name="search" value="search" style='background-color:#80dfff; border:none;'/>
</form>
</div>
</div><!--Menubar ends here!-->
<!--Content Wrapper here!-->
<div class="content_wrapper">
<div id="sidebar">
<div id="sidebar_title"> Categories</div>
<ul id="cats">
<?php getCats(); ?>
</ul>
</div>
<!--CONTENT AREA starts here-->
<div id="content_area">
<?php cart(); ?>
<div id='shopping_cart'>
<span style='float:right; font-size:18px; padding-right:5px; padding:5px; line-height:40px;'>
Welcome Guest!
<b style='color:#336600'>SHOPPING CART</b>
Total Items:<?php total_items(); ?>
Total Price: <?php total_price(); ?>
<a href="cart.php" style='color:#336600'>Go to Cart</a>
</span>
</div>
<div id="product_box">
<!--CODE IN SHOWING ALL PRODUCTS-->
<?php
$get_prod = "select * from item order by ItemName";
$run_prod = mysqli_query($con, $get_prod);
while($row_prod = mysqli_fetch_array($run_prod)){
$prod_id = $row_prod['ItemId'];
$prod_name = $row_prod['ItemName'];
$prod_desc = $row_prod['ItemDesc'];
$prod_price = $row_prod['ItemPrice'];
$prod_qty = $row_prod['ItemQty'];
$prod_cat = $row_prod['ItemCat'];
$prod_img = $row_prod['ItemImg'];
echo "
<div id='single_product'>
<img src='../admin_int/product_images/$prod_img' width='180' height=180'/>
<h4>Name:</h4><h4> $prod_name</h4>
<p><b>Price: $ $prod_price</b></p>
<a href='details.php?prod_id=$prod_id' style='float:left; font-size:19px;padding-top:10px;text-decoration:none'>Details</a>
<a href='index.php?prod_id=$prod_id'><button style = 'float:right; border:1; border-radius:12px; color:blue;
height:50px; width:50px;
background-color: #80ff80'>
Add to Cart</button></a>
</div>
";
}
?> <!--END OF ALL PRODUCTS-->
</div>
</div><!--END OF CONTENT AREA-->
</div><!--Content Wrapper ends here!-->
<div id="footer"><h2 style='text-align:center; padding-top:25px;'>© Jerlon Buenconsejo 2015</h2> </div>
</div><!--Wrapper-->
</body>
</html>
答案 0 :(得分：0)
您被重定向到index.php，因为这是您在链接中指定的页面：
<a href='index.php?prod_id=$prod_id'>
将其更改为您网页的名称。此外，您还需要在页面顶部调用cart（）函数。
您应该考虑调用一个唯一的页面addCaddy.php作为示例，重定向到插入产品后的页面，或者您可以使用ajax调用。