PHP 魔术方法 - __get 和 __set 在 php MVC 框架 serviceFactory 中不起作用

Question

我在 index.php 中创建了一个 serviceFactory 实例，它本身只是获取/存储（私有）变量。但是，由于某种原因，__get 和 __set 魔术方法不起作用。在索引中执行 var_dump($serviceFactory->language) 会返回 false。当我创建 serviceFactory 的实例时，我将 $router 实例传递给 $serviceFactory 构造函数。路由器正在工作（否则它不会显示控制器或视图），但由于某种原因，当我尝试从 $serviceFactory 实例中获取语言时，它返回 false，我不知道为什么。

index.php

//create an instance of serviceFactory
$serviceFactory = new serviceFactory($router);
var_dump($serviceFactory->language);

服务工厂

class serviceFactory {
    private $data = array();
    public function __construct($router) { //store the router data
        $data['language'] = $router->getKey('language');
        $data['class'] = $router->getKey('className');
        $data['method'] = $router->getKey('method');
        $data['arg'] = $router->getKey('arg');
    }
    public function __set($key, $val) {
        $this->data[$key] = $val;
    }
    public function __get($key) {
        if(isset($this->data[$key])) {
            return $this->data[$key];
        }
        else {
            return false;
        }
    }
}

Answer 1

很简单，您在使用实例时犯了一个常见错误：

    $data['language'] = $router->getKey('language');
    $data['class'] = $router->getKey('className');
    $data['method'] = $router->getKey('method');
    $data['arg'] = $router->getKey('arg');

应该都是

    $this->data['language'] = $router->getKey('language');
    $this->data['class'] = $router->getKey('className');
    $this->data['method'] = $router->getKey('method');
    $this->data['arg'] = $router->getKey('arg');