cart.php

<?php
  session_start();
  // connect to database
  include 'config/database.php';

  // include objects
  include_once "objects/product.php";
  include_once "objects/product_image.php";
  include_once "objects/cart_item.php";

  // get database connection
  $database = new Database();
  $db = $database->getConnection();

  // initialize objects
  $product = new Product($db);
  $product_image = new ProductImage($db);
  $cart_item = new CartItem($db);

  // set page title
  $page_title="Cart";

  // include page header html
  include 'layout_head.php';

  $action = isset($_GET['action']) ? $_GET['action'] : "";

  echo "<div class='col-md-12'>";
    if($action=='removed'){
        echo "<div class='alert alert-info'>";
            echo "Product was removed from your cart!";
        echo "</div>";
    }else if($action=='quantity_updated'){
        echo "<div class='alert alert-info'>";
            echo "Product quantity was updated!";
        echo "</div>";
    }else if($action=='exists'){
        echo "<div class='alert alert-info'>";
            echo "Product already exists in your cart!";
        echo "</div>";
    }else if($action=='cart_emptied'){
        echo "<div class='alert alert-info'>";
            echo "Cart was emptied.";
        echo "</div>";
    }else if($action=='updated'){
        echo "<div class='alert alert-info'>";
            echo "Quantity was updated.";
        echo "</div>";
    }else if($action=='unable_to_update'){
        echo "<div class='alert alert-danger'>";
            echo "Unable to update quantity.";
        echo "</div>";
    }
  echo "</div>";

  // $cart_count variable is initialized in navigation.php
  if($cart_count>0){

    $cart_item->user_id=$_SESSION['user_id'];
    $stmt=$cart_item->read();

    $total=0;
    $item_count=0;

    while ($row = $stmt->fetch(PDO::FETCH_ASSOC)){
        extract($row);

        $sub_total=$price*$quantity;

        echo "<div class='cart-row'>";
            echo "<div class='col-md-8'>";
                // product name
                echo "<div class='product-name m-b-10px'>";
                    echo "<h4>{$name}</h4>";
                echo "</div>";

                // update quantity
                echo "<form class='update-quantity-form' action='update_quantity.php' method='GET'>";
                    echo "<div class='product-id' style='display:none;'>{$id}</div>";
                    echo "<div class='input-group'>";
                        echo "<input type='number' name='quantity' value='{$quantity}' class='form-control cart-quantity' min='1' />";
                        echo "<input type='hidden' name='id' value='{$id}' />";
                            echo "<span class='input-group-btn'>";
                                echo "<button class='btn btn-default update-quantity' type='submit'>Update</button>";
                            echo "</span>";
                    echo "</div>";
                echo "</form>";

                // delete from cart
                echo "<a href='remove_from_cart.php?id={$id}' class='btn btn-default'>";
                    echo "Delete";
                echo "</a>";
            echo "</div>";

            echo "<div class='col-md-4'>";
                echo "<h4>Rs. " . number_format($sub_total, 2, '.', ',') . "</h4>";
            echo "</div>";
        echo "</div>";

        $item_count += $quantity;
        $total+=$sub_total;
    }

    echo "<div class='col-md-8'></div>";
    echo "<div class='col-md-4'>";
        echo "<div class='cart-row'>";
            echo "<h4 class='m-b-10px'>Total ({$item_count} items)</h4>";
            echo "<h4>Rs. " . number_format($total, 2, '.', ',') . "</h4>";
            echo "<a href='checkout.php' class='btn btn-success m-b-10px'>";
                echo "<span class='glyphicon glyphicon-shopping-cart'></span> Proceed to Checkout";
            echo "</a>";
        echo "</div>";
    echo "</div>";

  }else{
    echo "<div class='col-md-12'>";
        echo "<div class='alert alert-danger'>";
            echo "No products found in your cart!";
        echo "</div>";
    echo "</div>";
  }
  // layout footer
  include 'layout_foot.php';
?>