/**
 * 3.1.4 原始代码 - [system/Router.php]
 */
// if ( ! file_exists(APPPATH.‘controllers/‘.$this->directory.ucfirst($class).‘.php‘))
// {
// 	// This will trigger 404 later
// 	return;
// }

/**
 * 3.1.4 修复代码 - [system/Router.php]
 *
 * 修复 - 不能将默认控制器放在子目录中
 */
if ( ! file_exists(APPPATH . ‘controllers/‘ . $this->directory . ucfirst($class) . ‘.php‘))
{
    $path_arr = explode(‘/‘, trim($this->default_controller, ‘/‘));

    $class = ucfirst($path_arr[1]);
    $method = isset($path_arr[2]) ? $path_arr[2]: ‘index‘;

    if (file_exists(APPPATH . ‘controllers/‘ . $this->directory . $path_arr[0]. ‘/‘ . $class . ‘.php‘))
    {
        $this->directory .= $path_arr[0]. ‘/‘;
    }
}