关于fopen的问题.着急中!!!!!!

Question

Header("Content-type: ".$arr['f_type']);
Header("Accept-Ranges: bytes"); 
Header("Accept-Length: ".filesize("fileuploads/" . $arr['f_name']));
Header("Content-Disposition: attachment; filename=" . $arr['f_name']); readfile("fileuploads/" . $arr['f_name']);试试

Answer 1

echo fread($downFile,filesize("fileuploads/" . $arr['f_name']));
echo fread($downFile,filesize("fileuploads/".$arr['f_name']));
为什么要两次？？不解！

Answer 2

$file_name = "info_check.exe";
$file_dir = "/public/www/download/";
if (!file_exists($file_dir . $file_name)) { //检查文件是否存在
echo "文件找不到";
exit; 
} else {
$file = fopen($file_dir . $file_name,"r"); // 打开文件 
// 输入文件标签
Header("Content-type: application/octet-stream");
Header("Accept-Ranges: bytes");
Header("Accept-Length: ".filesize($file_dir . $file_name));
Header("Content-Disposition: attachment; filename=" . $file_name);
// 输出文件内容
echo fread($file,filesize($file_dir . $file_name));
fclose($file);
exit;} 
http://blog.csdn.net/kingerq/archive/2004/10/06/126490.aspx