PHP下载文件

/***文件下载*@param $filepath源文件路径 */function dwon_file($filepath){if(file_exists($filepath)){header('content-type:text/html;charset=utf8');header('Content-Description: File Transfer');header('Content-Type: application/octet-stream');header('Content-Disposition: attachment; filename='.basename($filepath));header('Content-Transfer-Encoding: binary');header('Expires: 0');header('Cache-Control: must-revalidate, post-check=0, pre-check=0');header('Pragma: public');header('Content-Length:'.filesize($filepath));readfile($filepath);return true;}else{return false;	}}