How can PHP developers effectively manage and display products selected by users in a shopping cart system using sessions?

To effectively manage and display products selected by users in a shopping cart system using sessions, PHP developers can store the selected products in a session variable as an array. Each time a user adds or removes a product from the cart, the session variable is updated accordingly. When displaying the products in the cart, developers can iterate over the session variable array to show the product details. 

// Start the session
session_start();

// Add product to cart
if(isset($_POST['add_to_cart'])){
    $product_id = $_POST['product_id'];
    
    // Check if cart already exists in session, if not, create an empty array
    if(!isset($_SESSION['cart'])){
        $_SESSION['cart'] = array();
    }
    
    // Add product to cart
    $_SESSION['cart'][$product_id] = $product_id;
}

// Display products in cart
if(isset($_SESSION['cart'])){
    foreach($_SESSION['cart'] as $product_id){
        // Display product details here
        echo "Product ID: " . $product_id . "<br>";
    }
}

Keywords

PHP session management shopping cart product display user selection

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