app.php

<?php
    require_once __DIR__."/../vendor/autoload.php";
    require_once __DIR__."/../src/Car.php";
$app['debug']=true;
    session_start();
    if(empty($_SESSION['list_of_cars'])) {
        $porsche = new Car("2014 Porsche 911", 114991, 7864, "/img/911.jpg");
        $ford = new Car("2011 Ford F450", 55995, 14241, "img/f450.jpeg");
        $lexus = new Car("2013 Lexus RX 350", 44700, 20000, "img/rx350.jpg");
        $mercedes = new Car("Mercedes Benz CLS550", 39900, 37979, "img/cls550.jpeg");
        $_SESSION['list_of_cars'] = array($porsche, $ford, $lexus, $mercedes);
    }

    $app = new Silex\Application();

    $app->register(new Silex\Provider\TwigServiceProvider(), array('twig.path'=> __DIR__.'/../views'));

    $app->get('/', function() use ($app) {
        // $_SESSION['list_of_cars'] = array();
        $cars = $_SESSION['list_of_cars'];
        return $app['twig']->render('index.html.twig', array('cars'=> $cars));
    });

    $app->get('/new_car', function() use ($app) {
        return $app['twig']->render('new_car.html.twig');
    });

    $app->post('/boing', function() use ($app) {
        $car_list = new Car ($_POST['make'], $_POST['price'], $_POST['mileage'], $_POST['image']);
        $car_list->saveCar();
        $cars = $_SESSION['list_of_cars'];
        return $app['twig']->render('index.html.twig', array('cars'=> $cars));
    });

    $app->get('/sort_cars', function() use ($app) {
        return $app['twig']->render('car_sort.html.twig');
    });

    $app->post('/sorter', function() use ($app) {
        $cars = $_SESSION['list_of_cars'];
        $cars_matching_search = array();
        foreach ($cars as $car) {
            if ($car->worthBuying($_POST['priceInput'], $_POST['mileageInput'])) {
            array_push($cars_matching_search, $car);
            }
        }
        // *something*::filterCars($cars)
        return $app['twig']->render('index.html.twig', array('cars' => $cars_matching_search));
    });

    return $app;
 ?>