PHP-视图引导控制器

这几行代码有问题

当我转到localhost/站点工作时
当我转到localhost时，欢迎站点不工作！转到echo=>string，失败
当我转到localhost/webwell/other站点时，工作，但下面有错误

严格标准：call_user_func_array（）要求参数1是一个有效的回调，非静态方法welcome:：king（）不应在bootstrap.php中的第=>行call_user_filc_array（[$this->_controller，$this-->_method]，$this->_params）中静态调用；

引导程序中的代码.php

if(empty($url)) 
                {
                    $name_controller = ROOT;
                    $this->_requireController($name_controller);
                    $contro = new $name_controller();
                    $contro->$name_controller();
                } 
                else 
                {
                    $this->_controller = $url[0];
                    if(isset($url[1]))
                    {
                        $this->_methode = $url[1];
                        unset($url[0]);
                        unset($url[1]);
                        $this->_params = $url ? array_values($url) : [];
                        echo "222";
                    } 
                    else 
                    {
                        echo "string";
                    }
                    $this->_requireController($this->_controller);
                    $contro = new $this->_controller();
                    if(method_exists($contro, $this->_methode))
                    {
                        call_user_func_array([$this->_controller, $this->_methode], $this->_params);
                    } 
                    else 
                    {
                        echo 'FAIL';
                    }
                }
            }

Controllers/welcome.php

类欢迎扩展控制器｛

function __construct()
{
    parent::__construct();
}
public function welcome() 
{
  echo "work!";
}
public function other()
{
  echo "Other Work";
}
public function other_arg($arg)
{
  echo "Other Work with ".$arg;
}

}