为什么我的全局数组是空的在我的扩展类 - PHP Why is my globals array empty in my extended class

PHP Why is my globals array empty in my extended class

我在扩展类中获得全局数组时遇到了麻烦。该数组由使用url传递的参数填充。

我得到我的url然后爆炸它。然后我将前两个参数设置为一个类和一个方法。然后重新设置数组键，以便参数从0开始。

例如:

class App
{
    protected $controller = '';
    protected $method = '';
    protected $param = [];
    public function init()
    {
        if (isset($_GET['url'])) {
            $url = explode('/', filter_var(trim($_GET['url'], '/'), FILTER_SANITIZE_URL));
        }
        else
        {
            header('Location: /home');
        }
        if (file_exists(APP . '/controllers/' . $url[0] . '.php')) 
        {
            $this->controller = $url[0];
            unset($url[0]);
        }
        else
        {
            if (DEVELOPMENT == true) {
                var_dump($url);
            }
            else
            {
                header('Location: /home');
            }
        }
        require_once 'controllers/' . $this->controller . '.php';
        $className = ucfirst($this->controller);
        $class = new $className;
        if (isset($url[1])) 
        {
            if (method_exists($className, $url[1])) 
            {
                $this->method = $url[1];
                unset($url[1]);
                $methodName = $this->method;
                $class->$methodName();
            }
        }
         $GLOBALS['param'] = array_values($url);
    }
    public function view($view)
    {
        require_once VIEW . '/header.htm';
        require_once VIEW . '/' . $view . '.htm';
        require_once VIEW . '/footer.htm';
    }
}

如果我的url是site/class/method/foo/bar我转储$GLOBALS['param']我得到

array (size=2)
0 => string 'foo' (length=3)
1 => string 'bar' (length=3)

这是好的和我想要的。

但是，如果我对扩展类做相同的转储。

class User extends App
{
    public function __construct()
    {
        var_dump($GLOBALS['param']);    
    }
}

我的数组为空。我真正想做的是能够从任何控制器类的url中获取参数并使用它们。我该怎么做呢?

我错了。我通过使用call_user_func_array解析方法的参数来解决这个问题，如下所示

class App
{
    protected $controller = 'home';
    protected $method = 'index';
    protected $params = [];
    public function init()
    {
        $url = $this->parseUrl();
        if (file_exists(APP . '/controllers/' . $url[0] . '.php')) 
        {
            $this->controller = $url[0];
            unset($url[0]);
        }
        require_once APP . '/controllers/' . $this->controller . '.php';
        $this->controller = new $this->controller;
        if (isset($url[1])) 
        {
            if (method_exists($this->controller, $url[1])) 
            {
                $this->method = $url[1];
                unset($url[1]);
            }
        }
        $this->params = $url ? array_values($url) : [];
        // Parse params to method
        call_user_func_array([$this->controller, $this->method], $this->params);
    }
    public function parseUrl()
    {
        if (isset($_GET['url'])) 
        {
            return $url = explode('/', filter_var(trim($_GET['url'], '/'), FILTER_SANITIZE_URL));
        }
    }
    public function view($view)
    {
        require_once VIEW . '/header.htm';
        require_once VIEW . '/' . $view . '.htm';
        require_once VIEW . '/footer.htm';
    }
}

然后我可以在扩展类

中获取参数

class User extends App
{
    public function index($var = '', $otherVar = '')
    {
        echo $var. $otherVar;
    }
    public function register()
    {
        $this->view('user-register');
    }
    public function login()
    {
        $this->view('user-login');
    }
}