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: / home3 / encodto1 / slg.encodersunlimited.com /
Filename : cart_handler.php
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<?php
session_start();
include 'config.php';

$user_id = $_SESSION['user_id']; // Ensure user login system exists

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $product_id = $_POST['product_id'];
    $action = $_POST['action'];

    if ($action === "add") {
        $check_query = "SELECT * FROM cart WHERE user_id = $user_id AND product_id = $product_id";
        $check_result = mysqli_query($conn, $check_query);

        if (mysqli_num_rows($check_result) > 0) {
            $update_query = "UPDATE cart SET quantity = quantity + 1 WHERE user_id = $user_id AND product_id = $product_id";
            mysqli_query($conn, $update_query);
        } else {
            $insert_query = "INSERT INTO cart (user_id, product_id, quantity) VALUES ($user_id, $product_id, 1)";
            mysqli_query($conn, $insert_query);
        }
    }

    if ($action === "update") {
        $quantity = $_POST['quantity'];
        $update_query = "UPDATE cart SET quantity = $quantity WHERE user_id = $user_id AND product_id = $product_id";
        mysqli_query($conn, $update_query);
    }

    if ($action === "remove") {
        $delete_query = "DELETE FROM cart WHERE user_id = $user_id AND product_id = $product_id";
        mysqli_query($conn, $delete_query);
    }
}
?>