php error when download files

最新推荐文章于 2024-07-02 09:01:05 发布

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最新推荐文章于 2024-07-02 09:01:05 发布

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分类专栏： php 文章标签： download php buffer timezone session file

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本文讨论了如何通过调整ob_start函数的参数来优化PHP程序的内存使用，并解释了session_start及date_default_timezone_set函数对文件下载过程的影响。

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Just remove ob_start and session_star,and the program will be working.
1)ob_start("ob_gzhandler", 4096);// that is failed because the buffer size less than the file size.
2) ob_start("ob_gzhandler", 409600);// that is success because the buffer size more big than the file size.
3)ob_start("ob_gzhandler");// that is success because the buffer size is not limited.
We should not add ob_start here,because if download big file ,it will cost many memory buffer of server.

If we use the two php functions which are session_start and date_default_timezone_set ,our downloading process will be failed,if we only use any one of them,our downloading process will be success,it is very strange.