我正在尝试用php制作一个购物车。我想发送id到下面的文件中的php代码。我尝试用php_self来做。我得到了这些错误
*Undefined index: movie_id in C:'xampp'htdocs'ITA_WEBSITE'shopping_cart.php on line 60
*mysqli_fetch_object() expects parameter 1 to be mysqli_result, boolean given in C:'xampp'htdocs'ITA_WEBSITE'shopping_cart.php on line 61
*Undefined index: cart in C:'xampp'htdocs'ITA_WEBSITE'shopping_cart.php on line 84
下面是代码
<?php
session_start();
include('dbconfig.php');
$result = mysqli_query($con,"SELECT * FROM movie_details");
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Movie Store</title>
<link rel="stylesheet" type="text/css" href="css/bootstrap.css">
<link rel="stylesheet" type="text/css" href="css/main.css">
</head>
<body>
<div class="container-fluid" id="maincontent">
<div class="row">
<?php while($product = mysqli_fetch_object($result)) { ?>
<div class="col-md-4 col-xs-12">
<div class="thumbnail customsthumbs">
<img src=<?php echo $product->image_path;?> alt=<?php echo $product->image_path;?>>
<div class="caption">
<h3 class="customh"><?php echo $product->movie_title;?></h3>
<p id="price">Price : $<?php echo $product->price;?></p>
<p style="text-align:center"><a href=<?php $_SERVER['PHP_SELF'].'?movie_id='?><?php echo $product->movie_id?> class="btn btn-primary custombtn" role="button">
<span class="glyphicon glyphicon-shopping-cart" aria-hidden="true"></span>Add To Cart</a>
</p>
</div>
</div>
</div>
<?php } ?>
</div>
<?php
include('dbconfig.php');
include('movie_products.php');
$result = mysqli_query($con, 'SELECT * FROM movie_details WHERE movie_id = '.$_GET['movie_id']);
$product = mysqli_fetch_object($result);
if(isset($_GET['movie_id'])){
$item = new Item();
$item->movie_id = $product->movie_id;
$item->movie_title = $product->movie_title;
$item->price = $product->price;
$item->quantity = 1;
$_SESSION['shopping_cart'][] = $item;
}
?>
<div class="container-fluid">
<div class="row">
<div id="cart">
<h3 style="text-align: center;font-size: 40px;padding-top: 5px;">Cart</h3>
<div id="display_cart">
<table border="1" id="display_cart_table">
<tr>
<th>Movie Title</th>
<th>Price</th>
<th>Action</th>
</tr>
<?php
$cart = unserialize(serialize($_SESSION['cart']));
for($i=0; $i<count($cart); $i++){
?>
<tr>
<td><?php echo $cart[$i]->movie_title;?></td>
<td><?php echo $cart[$i]->price;?></td>
<td></td>
</tr>
<?php } ?>
</table>
</div>
</div>
</div>
</div>
</body>
</html>
<?php
class Item{
var $movie_id;
var $movie_title;
var $price;
var $quantity;
}
?>
注意:我试图通过遵循教程来做到这一点需要一些帮助!!
看下面的语句，
<p style="text-align:center"><a href=<?php $_SERVER['PHP_SELF'].'?movie_id='?> ...
^ see here
你忘了在这里用echo。应该是
<p style="text-align:center"><a href=<?php echo $_SERVER['PHP_SELF'].'?movie_id='?>...
同样，将代码块封装在if块中，像这样:
// your code
if(isset($_GET['movie_id'])){
include('dbconfig.php');
include('movie_products.php');
$result = mysqli_query($con, 'SELECT * FROM movie_details WHERE movie_id = '.$_GET['movie_id']);
$product = mysqli_fetch_object($result);
if(isset($_GET['movie_id'])){
$item = new Item();
$item->movie_id = $product->movie_id;
$item->movie_title = $product->movie_title;
$item->price = $product->price;
$item->quantity = 1;
$_SESSION['shopping_cart'][] = $item;
}
?>
<div class="container-fluid">
<div class="row">
<div id="cart">
<h3 style="text-align: center;font-size: 40px;padding-top: 5px;">Cart</h3>
<div id="display_cart">
<table border="1" id="display_cart_table">
<tr>
<th>Movie Title</th>
<th>Price</th>
<th>Action</th>
</tr>
<?php
$cart = unserialize(serialize($_SESSION['cart']));
for($i=0; $i<count($cart); $i++){
?>
<tr>
<td><?php echo $cart[$i]->movie_title;?></td>
<td><?php echo $cart[$i]->price;?></td>
<td></td>
</tr>
<?php } ?>
</table>
</div>
</div>
</div>
</div>
<?php
}