manage_cart.php

<?php
session_start();
include('database.inc.php');
include('function.inc.php');
include('constant.inc.php');

$attr = get_safe_value($_POST['attr']);
$type = get_safe_value($_POST['type']);

if ($type == 'add') {
    $qty = get_safe_value($_POST['qty']);
    if (isset($_SESSION['FOOD_USER_ID'])) {
        $uid = $_SESSION['FOOD_USER_ID'];
        manageUserCart($uid, $qty, $attr);
    } else {
        $_SESSION['cart'][$attr]['qty'] = $qty;
    }
    $getUserFullCart = getUserFullCart();
    $totalPrice = 0;
    foreach ($getUserFullCart as $list) {
        $totalPrice = $totalPrice + ($list['qty'] * $list['price']);
    }

    $getDishDetail = getDishDetailById($attr);
    $price = $getDishDetail['price'];
    $dish = $getDishDetail['dish'];
    $image = $getDishDetail['image'];

    $totaDish = count(getUserFullCart());
    $arr = array('totalCartDish' => $totaDish, 'totalPrice' => $totalPrice, 'price' => $price, 'dish' => $dish, 'image' => $image);
    echo json_encode($arr);
}
if($type=='delete'){
	removeDishFromCartByid($attr);
	$getUserFullCart=getUserFullCart();
	$totaDish=count($getUserFullCart);
	$totalPrice=0;
	foreach($getUserFullCart as $list){
		$totalPrice=$totalPrice+($list['qty']*$list['price']);
	}
	$arr=array('totalCartDish'=>$totaDish,'totalPrice'=>$totalPrice);
	echo json_encode($arr);
}
?>