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| author | Joshua Slive <slive@apache.org> | 2001-05-05 21:20:19 +0200 |
|---|---|---|
| committer | Joshua Slive <slive@apache.org> | 2001-05-05 21:20:19 +0200 |
| commit | 5853a8c4c6ad94ae9d2af2dae76b5cc21d4cacbb (patch) | |
| tree | aac2390b964770a0061f9c9812f5256c9a681df4 /docs/manual/env.html.en | |
| parent | Kick out all old mutex code and base SSLMutex on APR locks. (diff) | |
| download | apache2-5853a8c4c6ad94ae9d2af2dae76b5cc21d4cacbb.tar.xz apache2-5853a8c4c6ad94ae9d2af2dae76b5cc21d4cacbb.zip | |
Explain the difference between the Apache environment and
the OS environment.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@89023 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'docs/manual/env.html.en')
| -rw-r--r-- | docs/manual/env.html.en | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/docs/manual/env.html.en b/docs/manual/env.html.en index f436e32819..23f8c4bac2 100644 --- a/docs/manual/env.html.en +++ b/docs/manual/env.html.en @@ -15,11 +15,23 @@ <!--#include virtual="header.html" --> <h1 align="center">Environment Variables in Apache</h1> -<p>Many operating systems provide a facility for storage and -transmission of information called environment variables. Apache uses -environment variables in many ways to control operations and to -communicate with other programs like CGI scripts. This document -explains some of the ways to use environment variables in Apache.</p> +<p>The Apache HTTP Server provides a mechanism for storing information +in named variables that are called <em>environment variables</em>. +This information can be used to control various operations such as +logging or access control. The variables are also used as a mechanism +to communicate with external programs such as CGI scripts. This +document discusses different ways to manipulate and use these +variables.</p> + +<p>Although these variables are referred to as <em>environment +variables</em>, they are not the same as the environment variables +controlled by the underlying operating system. Instead, these +variables are stored and manipulated in an internal Apache structure. +They only become actual operating system environment variables when +they are provided to CGI scripts and Server Side Include scripts. If +you wish to manipulate the operating system environment under which +the server itself runs, you must use the standard environment +manipulation mechanisms provided by your operating system shell.</p> <ul> <li><a href="#setting">Setting Environment Variables</a></li> @@ -145,7 +157,7 @@ For more details, see the <a href="howto/cgi.html">CGI tutorial</a>. <h3>SSI Pages</h3> <p>Server-parsed (SSI) documents processed by mod_include's -<code>server-parsed</code> handler can print environment variables +<code>INCLUDES</code> filter can print environment variables using the <code>echo</code> element, and can use environment variables in flow control elements to makes parts of a page conditional on characteristics of a request. Apache also provides SSI pages with the |