<?php
     require ($_SERVER['DOCUMENT_ROOT'] . '/assets/includes/inc.init.php');

     $username = $_GET['username'];
     $password = hash('sha256', $_GET['password']);

     echo $ecom->userManagement->doLogin($username, $password) == null;

Fatal error: Cannot declare class Ecom, because the name is already in use in /var/www/html/core/class.ecom.php on line 19

<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
date_default_timezone_set("UTC");

//TODO: Check Session

$config = parse_ini_file('config.ini');

$mysqli = new mysqli($config['db_host'], $config['db_user'], $config['db_password'], $config['db_name']);

/* check connection */
if ($mysqli->connect_errno) {
    printf("Connect failed: %sn", $mysqli->connect_error);
    exit();
}

require($_SERVER['DOCUMENT_ROOT'] . '/core/class.ecom.php');
$ecom = new Ecom($mysqli);

//TODO: Move the creation to when an item is added.
$cart = null;

if(isset($_COOKIE['cart_key'])) {
    $cart = $ecom->cartManagement->getCart($_COOKIE['cart_key']);

    if(!$cart->check()) {
        $cart->delete();
        $cart = $ecom->cartManagement->create($_SERVER['REMOTE_ADDR']);
        setcookie('cart_key', $cart->key, time()+60*60*24*365, '/', 'domain.com');
    }
} else {
    $cart = $ecom->cartManagement->create($_SERVER['REMOTE_ADDR']);
    setcookie('cart_key', $cart->key, time()+60*60*24*365, '/', 'domain.com');
}

$cart->updateExpiration();
?>

require($_SERVER['DOCUMENT_ROOT'] . '/core/class.ecom.php');
$ecom = new Ecom($mysqli);

<?php
require ($_SERVER['DOCUMENT_ROOT'] . '/assets/includes/inc.init.php');

$type = $_GET['type'];

if($type == "add") {
    $cart->addItem($_GET['id']);
}

else if($type == "remove") {
    $cart->removeItem($_GET['id']);
}

else if($type == "update") {
    $cart->updateItems();
}

echo 0;