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Adding Multiple Items in Cart (add to cart) using multiple different buttons

 原文  2016-12-07 11:52:12  0   3    javascript/ php/ html/ css/ mysql

Question

I am a beginner. I am developing an e-commerce website. My problem is that I can't seem to add multiple items in my cart. If I clicked an item it will be added to the cart but when I clicked another item it will just replaced the first item that I picked. Any suggestions on how I can fixed that? Thank you 

 <!-- This is my index.html. You can browse my products here. This is just a sample of my code. It's too long. Sry. --> <form method = "GET" action = "php/addtocartprocess.php"> <p>Price: 9,199 Php<br><input class = "btn btn-success"type = "submit" name = "add_to_cart1" value = "Add to Cart"><span class = "glyphicon glyphicon-shopping-cart"></span></p> <p>Price: 28,890 Php<br><input class = "btn btn-success"type = "submit" name = "add_to_cart2" value = "Add to Cart"><span class = "glyphicon glyphicon-shopping-cart"></span></p> <p>Price: 46,995 Php<br><input class = "btn btn-success"type = "submit" name = "add_to_cart3" value = "Add to Cart"><span class = "glyphicon glyphicon-shopping-cart"></span></p></form> 

 <?php // this is my php code. I don't know if it right or not if (session_status() == PHP_SESSION_NONE) { session_start(); } $connection = mysql_connect("localhost", "root", ""); if(isset($_GET['add_to_cart1'])){ $_SESSION['prod_id'] = 1; header("location: ../android.php"); } if(isset($_GET['add_to_cart2'])){ $_SESSION['prod_id'] = 2; header("location: ../android.php"); } if(isset($_GET['add_to_cart3'])){ $_SESSION['prod_id'] = 3; header("location: ../android.php"); } if(isset($_GET['add_to_cart4'])){ $_SESSION['prod_id'] = 4; header("location: ../android.php"); } if(isset($_GET['add_to_cart5'])){ $_SESSION['prod_id'] = 5; header("location: ../android.php"); } if(isset($_GET['add_to_cart6'])){ $_SESSION['prod_id'] = 6; header("location: ../android.php"); } if(isset($_GET['add_to_cart7'])){ $_SESSION['prod_id'] = 7; header("location: ../android.php"); } if(isset($_GET['add_to_cart8'])){ $_SESSION['prod_id'] = 8; header("location: ../android.php"); } if(isset($_GET['add_to_cart9'])){ $_SESSION['prod_id'] = 9; header("location: ../android.php"); } if(isset($_GET['add_to_cart10'])){ $_SESSION['prod_id'] = 10; header("location: ../iphone.php"); } if(isset($_GET['add_to_cart11'])){ $_SESSION['prod_id'] = 53; header("location: ../iphone.php"); } if(isset($_GET['add_to_cart12'])){ $_SESSION['prod_id'] = 54; header("location: ../iphone.php"); } if(isset($_GET['add_to_cart13'])){ $_SESSION['prod_id'] = 55; header("location: ../windows.php"); } if(isset($_GET['add_to_cart14'])){ $_SESSION['prod_id'] = 56; header("location: ../windows.php"); } if(isset($_GET['add_to_cart15'])){ $_SESSION['prod_id'] = 57; header("location: ../windows.php"); } if(isset($_GET['add_to_cart16'])){ $_SESSION['prod_id'] = 58; header("location: ../smartwatch.php"); } if(isset($_GET['add_to_cart17'])){ $_SESSION['prod_id'] = 59; header("location: ../smartwatch.php"); } if(isset($_GET['add_to_cart18'])){ $_SESSION['prod_id'] = 60; header("location: ../smartwatch.php"); } if(isset($_GET['add_to_cart19'])){ $_SESSION['prod_id'] = 61; header("location: ../computer.php"); } if(isset($_GET['add_to_cart20'])){ $_SESSION['prod_id'] = 62; header("location: ../computer.php"); } if(isset($_GET['add_to_cart21'])){ $_SESSION['prod_id'] = 64; header("location: ../computer.php"); } $gadgets = $_SESSION['prod_id']; mysql_close($connection); ?> 

 <!-- This is my cart.php code --> <?php include('php/userloginprocess.php'); // Includes Login Script include('php/addtocartprocess.php'); /*$id = $_SESSION['prod_id'];*/ $gadgets = $_SESSION['prod_id']; if($_SESSION['login'] == FALSE){ header("location: login.php"); } if($_SESSION['login'] == TRUE) ?> <?php //connection mysql_connect("localhost","root", "") or die(mysql_error()); //database connection mysql_select_db("marketech_db") or die(mysql_error()); //sql query $sql = "SELECT * FROM user_tbl"; $records=mysql_query($sql); ?> <html> <head> <title> Marketech | Buy Genuine Gadgets Online </title> <script src="js/jquery.js"></script> <script src="js/bootstrap.js"></script> <link rel="stylesheet" href="css/bootstrap.css"> <link rel="shortcut icon" href="images/marketechlogo.ico" /> </head> <body> <!-- First Navigation Bar --> <nav class="navbar navbar-default navbar-fixed-top"> <div class="container-fluid"> <!-- Brand and toggle get grouped for better mobile display --> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand" href="#">Marketech</a> </div> <!-- Collect the nav links, forms, and other content for toggling --> <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"> <form class="navbar-form navbar-left"> <div class="form-group"> <input type="text" class="form-control" placeholder="Search"> </div> <button type="submit" class="btn btn-default">Submit</button> </form> <ul class="nav navbar-nav navbar-right"> <li><a href="#"><span class = "glyphicon glyphicon-shopping-cart"></span> Cart</a></li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"><?php echo $_SESSION ['fname']; ?><span class="caret"></span></a> <ul class="dropdown-menu"> <li><a href="useraccountsettings.php">Account Settings</a></li> <li><a href="php/logout.php">Logout</a></li> </ul> </li> </ul> </div> </div> </nav> <!-- Second Navigation Bar --> <br><br><br> <div class = "container-fluid"> <nav class="navbar navbar-inverse navbar-lower"> <div class="container-fluid"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-2" aria-expanded="false"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> </div> <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-2"> <ul class="nav navbar-nav col-lg-12"> <li class="col-md-2"><a href="android.php">Android Phone</a></li> <li class="col-md-2"><a href="iphone.php">iPhone</a></li> <li class="col-md-2"><a href="windows.php">Windows Phone</a></li> <li class="col-md-2"><a href="smartwatch.php">Smart Watch</a></li> <li class="col-md-2"><a href="computer.php">Computers</a></li> <li class="dropdown col-md-2"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Popular Brands <span class="caret"></span></a> <ul class="dropdown-menu col-xs-2"> <li><a href="android.php#samsung">Samsung</a></li> <li><a href="iphone.php">Apple</a></li> <li><a href="windows.php">Microsoft</a></li> <li><a href="android.php#sony">Sony</a></li> <li><a href="android.php#asus">Asus</a></li> </ul> </li> </ul> </div> </div> </div> </nav> <!-- Marketechs Third Navigation (with glyphicons) --> <div class="container"> <ul class="list-unstyled"> <li class = "col-md-3"><span class="glyphicon glyphicon-transfer"></span> 30 days Free Returns</li> <li class = "col-md-3"><span class="glyphicon glyphicon-plane"></span> Free Delivery Above 999 php</li> <li class = "col-md-3"><span class="glyphicon glyphicon-usd"></span> Cash on Delivery</li> <li class = "col-md-3"><span class="glyphicon glyphicon-earphone"></span> Call (049) 557 2681</li> </ul> </div> </div> <!-- Cart --> <div class = "container-fluid"> <form method = "GET" action = "deletecartproduct.php"> <div class = "col-md-9"> <table class = "table table-responsive table-hover"> <tr> <th>Delete</th> <th>Item Name</th> <th>Item Price</th> <th>Image</th> </tr> <?php //connection mysql_connect("localhost", "root", "") or die(mysql_error()); mysql_select_db("marketech_db") or die (mysql_error()); $sql = "SELECT * FROM product_tbl WHERE prod_id='$gadgets'"; $prod_records = mysql_query($sql); while($products=mysql_fetch_assoc($prod_records)){ echo "<tr>"; echo "<td>" .'<input type="checkbox" name="products[]" value='.$products['prod_id'].'>'."</td>"; echo "<td>".$products['item_name']."</td>"; echo "<td>".$products['item_price']."</td>"; echo "<td>".$products['item_image']."</td>"; echo "</tr>"; } ?> </table> <input type ="submit" class = "btn btn-danger" name = "delete_cart_item" value = "Delete"></form> </div> </div> <br><br><br><br><br> <!-- Footer Navigation --> <nav class="navbar navbar-default"> <div class="container"> <ul class ="list-unstyled"> <li class = "col-md-2"><h5><b>Call Us: (049) 557 2681</b></h5></li> <li class = "col-md-2"><h5><b><a href = "about.html"><font color = "black">About Us </b></h5></font></a></li> <li class = "col-md-2"><h5><b><a href = "contact.html"><font color = "black">Contact Us</b></h5></font></a></li> <li class = "col-md-2"><h5><b><a href = "privacy.html"><font color = "black">Privacy</b></h5></font></a></li> <li class = "col-md-2"><h5><b><a href = "#"><font color = "black">Terms of Service</b></h5></font></a></li> <li class = "col-md-2"><h5><b>Copyright (c) 2016<h5></li> </ul> </div> </nav> <!-- Members: Marlon Mendoza --> </body> </html>

3 answers

solution1
 1  2016-12-07 12:11:14

You are using primitive session variable: $_SESSION['prod_id'] , instead it should be an array.

Initialise it like this:

$_SESSION['prod_ids'] = [];

Then when a product is added/removed to cart, update $_SESSION['prod_ids'] 

array_push($_SESSION['prod_ids'],/*product_id*/)

solution2
 0  2016-12-07 12:23:13

You should consider doing the following:

Add a hidden field to your HTML containing the product ID if the current product. 

<p>Price: 9,199 Php<br>
<input class="btn btn-success" type="submit" name="action" value="add_to_cart">
<input type="hidden" name="product_id" value="1">
<span class="glyphicon glyphicon-shopping-cart"></span>
</p>

Then you can refactor your PHP to this 

<?php

if (session_status() == PHP_SESSION_NONE) {
    session_start();
    $_SESSION['cart'] = array();
}

$connection = mysql_connect("localhost", "root", "");

if(isset($_GET['add_to_cart'])){
    array_push($_SESSION['cart'], $_GET['product_id'];
    header("location: ../" . $_GET['product_id'] . ".php");
}

mysql_close($connection);

Notice how you can initialize $_SESSION['cart'] as an array, when creating the session object. Instead of assigning the product ID to $_SESSION['cart'] , you can push it into the array.

Refactor the name of the php file which you set in your header, or add an additional hidden field containing the name of the file.

solution3
 0  2016-12-07 13:29:28

如果您有1000个要添加到购物车的商品，则不能编写if if语句。更好地使用循环。我为要创建的代码创建了示例代码，并使用自己的逻辑创建了所需的代码。 

check  https://jsfiddle.net/qun3ajL9/

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