方法一：
复制代码 代码如下:
 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($file_path);

方法二：
复制代码 代码如下:
 $fileinfo = pathinfo($filename);
 header("Content-type: application/x-".$fileinfo["extension"]);
 header("Content-Disposition: attachment; filename=".$fileinfo["basename"]);
 header("Content-Length: ".filesize($filename));
 readfile($thefile);
 exit();