value from database not appearing into php

Question

i have created a cart website using sql, html and php. the cart button is as below:

 <form method="post" action="cart.php" class="form-inline"> <input type="hidden" value="' . $product['id'] . '" name="product_id"> <input type="hidden" value="add_to_cart" name="add_to_cart"> <button type="submit" name="id" value="12" class="btn btn-primary">Add to Cart</button> </form> 

this is how my cart looks like:

 <div class="card"> <h5 class="card-header">My Cart</h5> <div class="card-body"> <?php if(isset($_SESSION['shopping_cart']) && count($_SESSION['shopping_cart']) > 0) { $entertainment = $_SESSION['shopping_cart']; echo ' <table class="table table-hover table-bordered"> <thead> <tr> <th scope="col">#</th> <th scope="col">Title</th> <th scope="col">Quantity</th> <th scope="col">Price</th> <th scope="col" width="100">Action</th> </tr> </thead>'; $item_number = 1; $total = 0; foreach ($entertainment as $product) { echo ' <tbody> <tr> <th scope="row">'. $item_number .'</th> <td>' . $product['title'] . '</td> <td>'.$product['quantity'].'</td> <td>$ '. $product['offer_price_corporate_artist']. '</td> <td> <a href="cart.php?id_to_remove=' . $item_number . '" class="btn btn-danger btn-sm">X</a> </td> </tr> </tbody> '; $total += ($product['offer_price_corporate_artist'] * $product['quantity']); $item_number++; } echo ' <tr> <th colspan="4" align="right"> Total: </th> <td> $ '. $total .' </td> </tr> </table>'; } else { echo '<div class="alert alert-primary" role="alert"> Shopping cart is empty, visit <a href="index.php" class="alert-link">products</a> page to add product into shopping cart. </div>'; } ?> 

the library.php file is as follows:

 <?php // load database connection script include("database_connection.php"); /* * Tutorial: PHP MySQL Shopping cart * * Page: Application library * */ class ShopingCart { protected $db; function __construct() { $this->db = DB(); } /** * get products list * * @return array */ public function getProducts() { $query = "SELECT * FROM `entertainment`"; if (!$result = mysqli_query($this->db, $query)) { exit(mysqli_error($this->db)); } $data = []; if (mysqli_num_rows($result) > 0) { while ($row = mysqli_fetch_assoc($result)) { $data[] = $row; } } return $data; } /** * get given product details * * @param [integer] $id * @return array */ public function getProductDetails($id) { $id = mysqli_real_escape_string($this->db, $id); $query = "SELECT * FROM `entertainment` WHERE `id` = '$id'"; if (!$result = mysqli_query($this->db, $query)) { exit(mysqli_error($this->db)); } $data = []; if (mysqli_num_rows($result) > 0) { while ($row = mysqli_fetch_assoc($result)) { $data['id'] = $row['id']; $data['title'] = $row['title']; $data['price'] = $row['offer_price_corporate_artist']; $data['quantity'] = 1; } } return $data; } /** * Add new product into the cart * * @param [integer] $id * @return void */ public function addToCart($id) { $product = $this->getProductDetails($id); $isFound = false; $i = 0; if (!isset($_SESSION['shopping_cart']) || count($_SESSION['shopping_cart']) < 1) { $_SESSION['shopping_cart'] = array(0 => $product); } else { foreach ($_SESSION['shopping_cart'] as $item) { $i++; foreach ($item as $key => $value) { if ($key == "id" && $value == $id) { array_splice($_SESSION['shopping_cart'], $i - 1, 1, array([ 'id' => $item['id'], 'title' => $item['title'], 'price' => $item['offer_price_corporate_artist'], 'quantity' => $item['quantity'] + 1, ])); $isFound = true; } } } if ($isFound == false) { array_push($_SESSION['shopping_cart'], $product); } } } /** * remove existing product from the cart * * @param [integer] $id * @return void */ public function removeProductFromCart($id) { unset($_SESSION['shopping_cart'][$id - 1]); } } ?> 

the thing is when i am adding items to the cart, i am able to display title and cart . but i am not able to display the price, whose field name is offer_price_corporate_artist in my database. can anyone tell me what i am missing.

Answer 1

Your Model for Shoppping Cart puts the offer_price_corporate_artist column into the returned arrays as a renames occurance called price

$data['price'] = $row['offer_price_corporate_artist'];

So in the other script replace

<td>$ '. $product['offer_price_corporate_artist']. '</td>

with

<td>$ '. $product['price']. '</td>

Small Warning

Unfortunately the getProducts() method does not rename the column as price so you have a bit of an anomily that is going to cause you a problem somewhere