How to override Apache keep-alive header using php?

Question

in my httpd.conf there is:

KeepAliveTimeout 1

I'm trying to override Apache KeepAliveTimeout setting in a single php script (not in the entire server) so I have a php script with:

header("Keep-Alive: timeout=60, max=100");

but it doesn't seem to make any difference. still I get in the response:

Keep-Alive:timeout=1, max=50

any ideas how to solve this?

Hi, have you found anything? – Maziyar May 21 '13 at 05:45 — Maziyar, May 21 '13 at 05:45

जलजनक · Answer 1 · 2013-03-09T08:57:39.680

2

You can't do that. It's there in place for a valid reason.

Apache v2.2 Core Features

KeepAliveTimeout Directive

The number of seconds Apache will wait for a subsequent request before closing the connection. Once a request has been received, the timeout value specified by the Timeout directive applies.

Setting KeepAliveTimeout to a high value may cause performance problems in heavily loaded servers. The higher the timeout, the more server processes will be kept occupied waiting on connections with idle clients.

edited Mar 09 '13 at 08:57

answered Mar 09 '13 at 08:32

जलजनक

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I don't see that documentation says that this is not possible. I know what keep-alive is, and I'm aware of the implications. That's exactly why I want to change KeepAliveTimeout for only one single php script, which is requested every few seconds. In the current state, the user creates new connections every few seconds. I would like it to reuse the first connection – David Mar 09 '13 at 08:46
Ability to control resides with Apache. Say if it's allowed then what's the point of keeping it? Then it ought to be called `DefaultKeepAliveTimeout`. If server is yours, why not increase at Apache? – जलजनक Mar 09 '13 at 08:57
3

As I said, increasing the value in httpd.conf will increase the value for **all** transactions. As you wrote before, there is performance hit when setting high value for all of the transactions. That's why I would like to do it for a specific php script. – David Mar 09 '13 at 12:19

score 0 · Answer 2 · edited May 23 '17 at 11:49

0

Try setting it in the .htaccess file combined with a FilesMatch directive. See this post.

edited May 23 '17 at 11:49

Community

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answered Aug 15 '14 at 21:41

user3629081

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score 0 · Answer 3 · edited Oct 07 '21 at 13:28

<?php
header('Connection: close');
// other php code here...
// ...

From RFC 2616, Section 14.10:

HTTP/1.1 defines the "close" connection option for the sender to
signal that the connection will be closed after completion of the
response. For example,
   Connection: close
in either the request or the response header fields indicates that the connection SHOULD NOT be considered `persistent' (section 8.1)
after the current request/response is complete.

HTTP/1.1 applications that do not support persistent connections MUST include the "close" connection option in every message.

Related: What does “Connection: close” mean when used in the response message?

How to override Apache keep-alive header using php?

3 Answers3

KeepAliveTimeout Directive

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