For each loop not looping all rows - php

Question

I'm trying to loop all rows of a table name cart but the foreach is only displaying the last row entered and always ignore the previous ones. Say I have 5 products in the cart_table well only product_id[5] will be displayed. If user adds a sixth item, only product_id[6] will now be displayed. The $item_count will also always equal 1 as if there is only one item when there are multiple. To my understanding in the foreach($items as $item) $items is not seen as an array even with multiple items. when I var_dump($items); it shows array(1) { [0]=>...
add_cart.php
<?php
ob_start();
require_once $_SERVER['DOCUMENT_ROOT'].'/ecommerce/core/init.php';
$product_id = isset($_POST['product_id'])? sanitize($_POST['product_id']):'';
$size = isset($_POST['size'])? sanitize($_POST['size']):'';
$available = isset($_POST['available'])? sanitize($_POST['available']):'';
$quantity = isset($_POST['quantity'])? sanitize($_POST['quantity']):'';
$item = array();
$item[] = array(
'id' => $product_id,
'size' => $size,
'quantity' => $quantity,
'available' => $available
);
$domain =($_SERVER['HTTP_HOST'] != 'localhost')?'.'.$_SERVER['HTTP_HOST']:false;
$query = $db->query("SELECT * FROM product WHERE id = '{$product_id}'");
$product = mysqli_fetch_assoc($query);
$_SESSION['success_flash'] = $product['prod_name']. ' was added to your cart.';
//check if the cart cookie exists
if (is_array($cart_id != ' ')) {
$cartQ = $db->query("SELECT * FROM cart WHERE id = '{$cart_id}'");
$cart = mysqli_fetch_assoc($cartQ);
$previous_items = json_decode($cart['items'],true);
$item_match = 0;
$new_items = array();
foreach($previous_items as $pitem){
if ($item[0]['id'] == $pitem['id'] && $item[0]['size'] == $pitem['size']) {
$pitem['quantity'] = $pitem['quantity'] + $item[0]['quantity'];
if ($pitem['quantity'] > $available) {
$pitem['quantity'] = $available;
}
$item_match = 1;
}
$new_items[] = $pitem;
}
if ($item_match != 1) {
$new_items = array_merge($item,$previous_items);
}
$items_json = json_encode($new_items);
$cart_expire = date("Y-m-d H:i:s",strtotime("+30 days"));
$db->query("UPDATE cart SET items = '{$items_json}', expire_date = '{$cart_expire}' WHERE id = '{cart_id}'");
setcookie(CART_COOKIE,'',1,"/",$domain,false);
setcookie(CART_COOKIE,$cart_id,CART_COOKIE_EXPIRE,'/',$domain,false);
}else{
// add to databse and set cookie
$items_json = json_encode($item);
$cart_expire = date("Y-m-d H:i:s",strtotime("+30 days"));
$db->query("INSERT INTO cart (items,expire_date) VALUES ('{$items_json}','{$cart_expire}')");
$cart_id = $db->insert_id;
setcookie(CART_COOKIE,$cart_id,CART_COOKIE_EXPIRE,'/',$domain,false);
}
?>
cart.php
<?php
require_once 'core/init.php';
//include 'includes/headerpartial.php';
if($cart_id != ' ') {
$cartQ = $db->query("SELECT * FROM cart WHERE id ='{$cart_id}' ");
$result = mysqli_fetch_assoc($cartQ);
$items = json_decode($result['items'], true);
$i = 1;
$sub_total = 0;
$item_count = 0;
}
?>
<?php if($cart_id == ' '): ?>
<div class="bg-danger">
<p class='text-center text-danger'>Your cart is empty.</p>
</div>
<?php else: ?>
<?php
foreach ($items as $item) {
var_export($items);
$product_id = $item['id'];
$productQuery = $db->query("SELECT * FROM product WHERE id ='{$product_id}' ");
$product = mysqli_fetch_assoc($productQuery);
$sArray = explode(',', $product['sizes']);
/* foreach ($sArray as $sizeString) {
$s = explode(':', $sizeString);
if($s[0] == $item['size']) {
$available = $s[1];
}
}*/
?>
<tr class="p">
<td class="image"><img src="<?= $product['image_1']; ?>"/></td>
<td class="name"><?= $product['prod_name']; ?></td>
<td class="price"><?= money($product['price']); ?></td>
<td class="quantity"><?= $item['quantity']; ?></td>
<td class="pricesubtotal"><?= money($item['quantity'] * $product['price']); ?></td>
<td class="remove">
<div>&times</div>
</td>
</tr>
<?php
$i ++;
$item_count += $item['quantity'];
$sub_total += ($product['price'] * $item['quantity']);
}
$tax = TAXRATE * $sub_total;
$tax = number_format($tax, 2);
$grand_total = $tax + $sub_total;
<?php endif;?>

Answer 1

Here is one of the problems. You told me that your id is an auto increment int, so I would like to propose this answer. The problem is in your sql command.
UPDATE cart SET items = '{$items_json}', expire_date = '{$cart_expire}' WHERE id = {cart_id}
Be sure to put that command in quotes. Also, I highly recommend preparing the JSON with this command:
$itemJson = addslashes($itemJson);
then, you can run the command. Another possibility would be to use the prepare method from mysqli. Here is a link to some examples:
w3schools.com
if you have any further questions, feel free to update your question, but be sure to #McStuffins in the comments.