zean/sim-di

simple dependency inject container

SimDI

一个简单的PHP依赖注入框架，支持autowire。, _(*1)

附上之前写的一篇文: 用PHP撸一个DI容器, _(*2)

安装

composer require zean/sim-di

使用

1. 不使用面向接口编程风格, _(*3)

   假如有Car和Driver两个类，Driver依赖Car, _(*4)

   class Car
   {
       protected $name = '汽车';
   
       public function getName()
       {
           return $this->name;
       }
   }
   

   class Driver
   {
       protected $car;
   
       public function __construct(Car $car)
       {
           $this->car = $car;
       }
   
       public function drive()
       {
           return '驾驶' . $this->car->getName();
       }
   }
   

   当我们需要Diver实例的时候，这时候我们只需要让容器创建，容器会自动注入Car实例, _(*5)

   $app = \SimDI\Container::getInstance();
   $driver = $app->get(Driver::class);
   echo $driver->drive();
   

output:驾驶汽车, _(*6)

1. 使用面向接口编程风格

假如我们用面向接口的方式来，我稍微修改一下上面的代码：, _(*7)

abstract class Car
{
    protected $name = '汽车';

    public function getName()
    {
        return $this->name;
    }
}

```php interface Driveable { public function run(); }, <sub>(*8)</sub>

```php
class Benz extends Car implements Driveable
{
    protected $name = '奔驰';

    public function run()
    {
        return $this->getName() . '启动了！';
    }
}

```php class Driver { protected $car;, <sub>(*9)</sub>

public function __construct(Driveable $car)
{
    $this->car = $car;
}

public function drive()
{
    return '驾驶' . $this->car->run();
}

}, <sub>(*10)</sub>

面向接口编程时需要有一个配置来指定interface和实现类的对应关系，如下：

```php
$config = [
    Driveable::class => Benz::class,
];

然后在创建容器的时候我们使用上述配置：, <sub>(*11)</sub>

$app = \SimDI\Container::getInstance($config);
$driver = $app->get(Driver::class);
echo $driver->drive();

output:驾驶奔驰启动了！, <sub>(*12)</sub>