工厂模式和IOC练习

<?php

Interface Tools
{
    public function run();
}

Class Car implements Tools
{
    public $name = 'car';
    public $wheels = 4;

    public function run()
    {
        return  "car runrun<br>";
    }

}

Class Walk implements Tools
{
    public $name = 'walk';

    public function run()
    {
       return  "walk runrun<br>";
    }

    public function walktaget()
    {
        echo "taget";
    }
}

Class ToolsFactory
{
    public function createTools($name)
    {
        switch ($name) {
            case 'Car':
                return new Car();
                break;
            case 'Walk':
                return new Walk();
                break;
            default:
                exit('err No tools');  //发生错误即使后面的正确也不执行了
                break;
        }
    }
}


Class Traveller
{
    private $trafficTools;

    public function __construct($tool)
    {
        $factory = new ToolsFactory();
        $this->trafficTools = $factory->createTools($tool);
    }

    public function go()
    {
        if (isset($this->trafficTools) && is_object($this->trafficTools))
         return $this->trafficTools->run();
    }

}

$walkr = new Traveller('Walk');
echo $walkr->go();
$carr = new Traveller('Car');
echo $carr->go();

Class TravellerIoc
{
    private $trafficTools;

    public function __construct(Tools $tool)
    {
        $this->trafficTools = $tool;
    }

    public function go()
    {
        return $this->trafficTools->run();
    }

}

$told = new TravellerIoc(new Car());

$told2 = new TravellerIoc(new Walk());
echo $told->go();
echo $told2->go();

$car1="ssss";

$trt=new Traveller($car1);
echo $trt->go();
$car2=new Car();

$trioc=new TravellerIoc($car2);
echo $trioc->go();

$walkl=new Walk();

$trioc=new TravellerIoc($walkl);
echo $trioc->go();

工厂模式和IOC的例子