Most basic IoC/DI container in PHP

IoCDI.php

<?php
/*
|--------------------------------------------------------------------------
| PHP IoC/DI container
|--------------------------------------------------------------------------
|
| Most simple IoC/DI container implemented in PHP.
| Also includes interface implementation (duck typing is not allowed when binding
| concrete class to container)
*/

 // TEST INTERFACE AND CLASSES
interface Vehicle
{
    public function drive();
}

class Car implements Vehicle
{
    public function drive()
    {
        echo get_class();
    }
}
class Track implements Vehicle
{
    public function drive()
    {
        echo get_class();
    }
}

//DUCK TYPING WILL THROW EXCEPTION
class Train
{
    public function drive()
    {
        echo get_class();
    }
}

 // ACTUAL CONTAINER
class Container
{
    private $bindings = [];
    public function bind($name, $cb)
    {
        $interface  = ucfirst($name);
        if ($cb() instanceof $interface) {
            $this->bindings[$name] = $cb;
        } else {
            throw new \Exception("Class " . get_class($cb()) . " must implement {$interface} interface");
        }
    }
    public function make($name)
    {
        foreach ($this->bindings as $key => $val) {
            if ($key == $name) {
                return $val();
            } else {
                throw new \Exception("There is no binding for {$key}");
            }
        }
    }
}

$container = new Container;

$container->bind('vehicle', function () {
    return new Car;
});


class Client
{
    /**
     * Implementation injected throw client constructor, but decision is on the framework
     * to resolve instance and check type
     */
    public function __construct(Vehicle $vehicle)
    {
        $this->vehicle = $vehicle;
    }
    /**
     * Through container
     */
    public function getVehicleThroughContainer(Container $container)
    {
        return $container->make('vehicle');
    }
}

//resolve instance from the container
$vehicle = $container->make('vehicle');

$client = new Client($vehicle);

$client->vehicle->drive();

$client->getVehicleThroughContainer($container)->drive();