在thinkphp中实现facade的方法

主要的思想是利用call_user_func_array()和容器结合使用的。

核心代码，理解都在注释中：

<?php
//reqeuestFacade.php
    namespace facade{
        class Request extends Facade{
            public function getFacadeName(){
                return 'request';
            }
        }
    }

?>

<?php
//facade.php
namespace facade{
    class Facade{

        public static function createFacade(){
            $class = static::class; //在这个获取的$class其实是facade\reqeust
            //在这里利用static::得到getFacadeName，返回真正的request的变量名
            $facadeClass = static::getFacadeName();

            if ($facadeClass) {
                $class = $facadeClass;
            } elseif (isset(self::$bind[$class])) {
                $class = self::$bind[$class];
            }
            //echo $class;
            利用容器去获取reqeust，而不是facade\reqeust
            return \Container::get($class);
        }
    
        public static function __callStatic($method, $params)
        {
            return call_user_func_array([static::createFacade(), $method], $params);
        }
    }
}


?>

下面测试代码

reqeust.php

<?php

class Request{
    public $name = 'Real Request';

    public  function sayName(){
        echo $this->name;
    }

}

?>

test.php

<?php

    use facade\Request;

    include "Container.php";
    include "Facade.php";
    include "RequestFacade.php";
    include "Request.php";

    Request::sayName();

?>

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