依赖注入简单代码

<?php
interface SuperModuleInterface{
    public function activate();
}


class Play implements SuperModuleInterface {

     protected $game;

    public function __construct($game='') {
        $this->game = $game;
    }

    public function activate(){
        echo $this->game;
    }
}




class Container{

    protected $binds;
    protected $instances;

    public function bind($abstract,$concrete){
        if($concrete instanceof Closure){
            $this->binds[$abstract]=$concrete;
        }else{
            $this->instances[$abstract]=$concrete;
        }
    }

    public function make($abstract,$parmeters=[]){
        if(isset($this->instances[$abstract])){
            return $this->instances[$abstract];
        }

        array_unshift($parmeters,$this);

        #调用回调函数，并把自身作为第一个参数传入
        return call_user_func_array($this->binds[$abstract],$parmeters);

    }

}

class Superman{

    protected $power;

    public function __construct(SuperModuleInterface $module) {
        $this->power=$module;
    }


    public function attack(){
        $powers=is_array($this->power)?$this->power:array($this->power);

        foreach($powers as $p){

             $p->activate();
        }
    }
}

$container=new Container();
$container->bind('Play',function($container,$game){
    return new Play($game);
});
$container->bind('Superman',function($container,$moduleName,...$arg){

    return new Superman($container->make($moduleName,$arg));
});
$superman_1=$container->make('Superman',['Play','战神']);
$superman_1->attack();