how to insert php cart data into mysql database - php

Question

I have developed shopping cart in PHP but while inserting cart data into the database I got an error of undefined index. Can anybody please tell me how do I solve it? I have called all the three values using POST method and these all are also present in the database still i am getting this error.Why?
Code:
reviewcart.php
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "midata";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
if(isset($_POST['submit']))
{
$name=$_POST['name'];
$code=$_POST['code'];
$quantity=$_POST['quantity'];
$sql = "INSERT INTO order_final (name, code, quantity)
VALUES ('$name', '$code', '$quantity')";
if ($conn->query($sql) === TRUE) {
}
else{
}
}
else{ echo 'query doesnt execute';
}
?>
<div class="container">
<?php
session_start();
require_once("dbcontroller.php");
$db_handle = new DBController();
if(!empty($_GET["action"])) {
switch($_GET["action"]) {
case "remove":
if(!empty($_SESSION["cart_item"])) {
foreach($_SESSION["cart_item"] as $k => $v) {
if($_GET["code"] == $k)
unset($_SESSION["cart_item"][$k]);
if(empty($_SESSION["cart_item"]))
unset($_SESSION["cart_item"]);
}
}
break;
case "empty":
unset($_SESSION["cart_item"]);
break;
}
}
?>
<div class="c-layout-sidebar-content ">
<!-- BEGIN: PAGE CONTENT -->
<div class="c-content-title-1 c-margin-t-30">
<h3 class="c-font-uppercase c-font-bold c-center ">Place Order</h3>
<div class="c-content-panel">
<div class="c-body">
<div class="row">
<div class="col-md-12">
<table class="table table-condensed">
<div id="shopping-cart">
<div class="txt-heading">Shopping Cart <a id="btnEmpty" href="reviewcart.php?action=empty">Empty Cart</a></div>
<?php
if(isset($_SESSION["cart_item"])){
$item_total = 0;
?>
<table class="col-md-12" cellpadding="10" cellspacing="1" >
<tbody class="col-md-12">
<tr>
<form action="" method="post">
<th class="col-md-3" style="text-align:center;"><strong>Name</strong></th>
<th class="col-md-3" style="text-align:center;"><strong>Code</strong></th>
<th class="col-md-3" style="text-align:center;"><strong>Quantity</strong></th>
<th class="col-md-3" style="text-align:center;"><strong>Price</strong></th>
<th class="col-md-3" style="text-align:center;"><strong>Action</strong></th>
</tr>
<?php
foreach ($_SESSION["cart_item"] as $item){
?>
<tr>
<td style="text-align:center;border-bottom:#F0F0F0 1px solid;"><strong><?php $name=$_POST['name'] ; echo $item["name"]; ?></strong></td>
<td style="text-align:center;border-bottom:#F0F0F0 1px solid;"><?php $code=$_POST['code'] ; echo $item["code"]; ?></td>
<td style="text-align:center;border-bottom:#F0F0F0 1px solid;"><?php $quantity=$_POST['quantity'] ; echo $item["quantity"]; ?></td>
<!-- <td style="text-align:center;border-bottom:#F0F0F0 1px solid;"><?php $price=$_POST['price'] ; echo $price ?></td> -->
<td style="text-align:center;border-bottom:#F0F0F0 1px solid;">Remove Item</td>
</tr>
<!-- <?php
$item_total += ($item["price"]*$item["quantity"]);
}
?>
-->
<tr>
<td colspan="5" align=right><input type="submit" name="submit" value="submit" /></td>
</tr></form>
</tbody>
</table>
<?php
}
?>
</div>
</table>
</div>
</div>
</div>
</div>
</div>
</div>
</div>

Answer 1

If we want to post any data via form mean we must want to use input tag then only we can accept it values on global arrays like $_POST, $_GET, $_FILES.
<tr>
<td style="text-align:center;border-bottom:#F0F0F0 1px solid;">
<strong><?php echo $item["name"]; ?></strong>
<input type="hidden" name="name" value="<?php echo $item['name']?>">
</td>
<td style="text-align:center;border-bottom:#F0F0F0 1px solid;">
<?php echo $item["code"]; ?>
<input type="hidden" name="code" value="<?php echo $item['code']?>">
</td>
<td style="text-align:center;border-bottom:#F0F0F0 1px solid;">
<?php echo $item["quantity"]; ?>
<input type="hidden" name="quantity" value="<?php echo $item['quantity']?>">
</td>
<!-- <td style="text-align:center;border-bottom:#F0F0F0 1px solid;">
<?php $price=$_POST['price'] ; echo $price ?>
</td> -->
<td style="text-align:center;border-bottom:#F0F0F0 1px solid;">
<a href="reviewcart.php?action=remove&code=<?php echo $item["code"]; ?>" class="btnRemoveAction">
Remove Item
</a>
</td>
</tr>