PHP-Facades的实现

示例

<?php class RealRoute{     public function get(){        echo '获得我';    }    }class Facade{    public static $resolvedInstance;    public static $app;    public static function __callStatic($method,$args){        $instance = static::getFacadeRoot();        if(!$instance){            throw new RuntimeException('A facade root has not been set.');        }        return $instance->$method(...$args);    }    //获取Facade根对象    public static function getFacadeRoot()    {        return static::resolveFacadeInstance(static::getFacadeAccessor());    }    protected static function resolveFacadeInstance($name){        if(is_object($name)){            return $name;        }        if (isset(static::$resolvedInstance[$name])) {            return static::$resolvedInstance[$name];        }        return static::$resolvedInstance[$name] = static::$app[$name];    }    }class Router extends Facade{    protected static function getFacadeAccessor(){        return 'router';    }}class Container{    public $binding;        public function bind($name,$obj){        $this->binding[$name] = $obj;    }        public function make($name,$args=[]){        call_user_func_array($name, $args);    }}//step1:先加入服务容器/*$container = new Facade;$container->bind('router',function(){    return new RealRoute;})*/Router::$app['router']=new RealRoute;//step2:创建类别名class_alias('Router','Route');//step3:通过门面调用类方法Route::get(); 

其他

PHP 魔术方法 __call 与 __callStatic 方法
简单理解call_user_func和call_user_func_array两个函数
class_alias--为一个类创建别名