即时压缩并下载

问题描述

大家好，

我正在尝试编写一个用于动态压缩和下载的php脚本.
我在尝试使其在此特定Web服务器上工作时遇到很多问题.
这是我的代码:

Hi all,

I''m trying to write a php script for on the fly compression and download.
I have lots of problems trying to get it working on this particular web server.
This is my code:

header(''Content-Type: application/octet-stream'');
header(''Content-disposition: attachment; filename="file.zip"'');
set_time_limit(0);
//$fp = proc_open(''zip -r9 - foldertocompress'', ''w'');
//$fp = system(''zip -r9 '');
// pick a bufsize that makes you happy (8192 has been suggested).
$bufsize = 8192;
$buff = '''';
while( !feof($fp) ) {
   $buff = fread($fp, $bufsize);
   echo $buff;
   flush();
}

我正在尝试不同的命令，以查看哪些有效，以及有趣的事情

分配给$ fp的两行就开始下载了吗?我真的不明白，$ fp从哪里获取数据?
谢谢，
Brian

I am trying out different commands to see which works, and the amusing thing
is that it starts to download even with the 2 lines assigning to $fp commented out?!
I really don''t understand this, where is $fp getting its data from?
Thanks,
Brian

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