function filedown($id, $type){	$ziliao = M("ziliao");	$data = http://www.mamicode.com/$ziliao->where("id=%d and type=%d",$id,$type)->find();	if(empty($data)){		$this->downerror("数据异常！");	}	$filename = $data[‘name‘];	$path = $data[‘path‘];	$path = $_SERVER[‘DOCUMENT_ROOT‘] . $path;	$path = iconv("UTF-8", "GB2312", $path);	if(!is_file($path)){		$this->downerror("文件不存在！");	}		$file = fopen($path,"r"); // 打开文件	// 输入文件标签	Header("Content-type: application/octet-stream");	Header("Accept-Ranges: bytes");	Header("Accept-Length: ".filesize($path));	Header("Content-Disposition: attachment; filename=" . iconv("UTF-8", "GB2312", $filename));	// 输出文件内容	echo fread($file,filesize($path));	fclose($file);	exit();}