解析PHP实现下载文件的两种方法

方法一：

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：

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();