我把ci的 loader函数改了下 大神帮我看看?

protected function _ci_load($_ci_data) {
        // Set the default data variables
        foreach (array('_ci_view', '_ci_vars', '_ci_path', '_ci_return') as $_ci_val) {
            $$_ci_val = (!isset($_ci_data[$_ci_val])) ? FALSE : $_ci_data[$_ci_val];
        }


        $file_exists = FALSE;
        $_ci_ext = '.html';
        // Set the path to the requested file
        if ($_ci_path != '') {
            $_ci_x = explode('/', $_ci_path);
            $_ci_file = end($_ci_x) . $_ci_ext;
        } else {
            //可以注释掉下面这一行,因为我们已经可以通过路由来自动加载视图
            //$_ci_ext = pathinfo($_ci_view, PATHINFO_EXTENSION);//获取视图文件的后缀名,默认是不传递后缀名的
            //拼接视图路径
            //加载配置,以方便获取mca(m:模块,c:控制器,a:action)的值
            $this->config = &load_class('Config', 'core');
            $directory_trigger = $this->config->item('directory_trigger');
            $controller_trigger = $this->config->item('controller_trigger');
            $function_trigger = $this->config->item('function_trigger');

            //用户没有配置伪静态的情况下,使用pathinfo
            $urlinfo = explode('/', $_SERVER['REQUEST_URI']);
            $urlinfo['module'] = @$urlinfo[1] ?  $urlinfo[1] : 'home';
            $urlinfo['controller'] = @$urlinfo[2] ?  $urlinfo[2] : 'index';
            $urlinfo['action'] = @$urlinfo[3] ?  $urlinfo[3] : 'index';


            $m = isset($_GET[$directory_trigger]) && $_GET[$directory_trigger]!='' ? $_GET[$directory_trigger] : $urlinfo['module'];
            $c =isset($_GET[$controller_trigger]) && $_GET[$controller_trigger]!=''  ? $_GET[$controller_trigger] : $urlinfo['controller'];
            $a = isset($_GET[$function_trigger])  && $_GET[$function_trigger] !=''? $_GET[$function_trigger] : $urlinfo['action'];
            //特殊处理common/header(包含公共头部/底部)的情况
            $slasharr = explode('/', $_ci_view);
            if (count($slasharr) > 1) {
                $_ci_file = $m . '/' . $slasharr['0'].'/' .$slasharr['1'] . $_ci_ext;
            } else {

                //默认的视图名称(不包含后缀名)
                $view_name = $_ci_view == '' ? $a : $_ci_view; //如果没有传视图的名称,默认使用action的名称
                $_ci_file = $m . '/' . $c . '/' . $view_name . $_ci_ext;
            }
            foreach ($this->_ci_view_paths as $view_file => $cascade) {
                    if (file_exists($view_file . $_ci_file)) {
                        $_ci_path = $view_file . $_ci_file;
                        $file_exists = TRUE;
                        break;
                    }

                    if (!$cascade) {
                        break;
                    }
                }
        }

        if (!$file_exists && !file_exists($_ci_path)) {
            show_error('Unable to load the requested file: ' . $_ci_file);
        }

        // This allows anything loaded using $this->load (views, files, etc.)
        // to become accessible from within the Controller and Model functions.

        $_ci_CI = & get_instance();
        foreach (get_object_vars($_ci_CI) as $_ci_key => $_ci_var) {
            if (!isset($this->$_ci_key)) {
                $this->$_ci_key = & $_ci_CI->$_ci_key;
            }
        }

        /*
         * Extract and cache variables
         *
         * You can either set variables using the dedicated $this->load_vars()
         * function or via the second parameter of this function. We'll merge
         * the two types and cache them so that views that are embedded within
         * other views can have access to these variables.
         */
        if (is_array($_ci_vars)) {
            $this->_ci_cached_vars = array_merge($this->_ci_cached_vars, $_ci_vars);
        }
        extract($this->_ci_cached_vars);

        /*
         * Buffer the output
         *
         * We buffer the output for two reasons:
         * 1. Speed. You get a significant speed boost.
         * 2. So that the final rendered template can be
         * post-processed by the output class.  Why do we
         * need post processing?  For one thing, in order to
         * show the elapsed page load time.  Unless we
         * can intercept the content right before it's sent to
         * the browser and then stop the timer it won't be accurate.
         */
        ob_start();

        // If the PHP installation does not support short tags we'll
        // do a little string replacement, changing the short tags
        // to standard PHP echo statements.

        if ((bool) @ini_get('short_open_tag') === FALSE AND config_item('rewrite_short_tags') == TRUE) {
            echo eval('?>' . preg_replace("/;*\s*\?>/", "; ?>", str_replace('=', '        } else {
            include($_ci_path); // include() vs include_once() allows for multiple views with the same name
        }

        log_message('debug', 'File loaded: ' . $_ci_path);

        // Return the file data if requested
        if ($_ci_return === TRUE) {
            $buffer = ob_get_contents();
            @ob_end_clean();
            return $buffer;
        }

        /*
         * Flush the buffer... or buff the flusher?
         *
         * In order to permit views to be nested within
         * other views, we need to flush the content back out whenever
         * we are beyond the first level of output buffering so that
         * it can be seen and included properly by the first included
         * template and any subsequent ones. Oy!
         *
         */
        if (ob_get_level() > $this->_ci_ob_level + 1) {
            ob_end_flush();
        } else {
            $_ci_CI->output->append_output(ob_get_contents());
            @ob_end_clean();
        }
    }