// Check if cart exists if (isset($_SESSION["cart"])) { // Update cart array_push($_SESSION["cart"], array($product_id, $quantity)); } else { // Create new cart $_SESSION["cart"] = array(array($product_id, $quantity)); } }

// Add to cart if (isset($_POST["add_to_cart"])) { $product_id = 1; $quantity = 1;

echo "Total: $" . $total . "<br>"; }

// Start session session_start();

Are you looking to create a robust and efficient e-commerce platform using PHP? Look no further! In this post, we'll explore how to implement a basic shopping system using PHP, focusing on a simple ID-based system.

$query = "SELECT price FROM products WHERE id = '$product_id'"; $result = mysqli_query($conn, $query); $row = mysqli_fetch_assoc($result);

Here's some sample PHP code to get you started: