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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" />
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<title>mod_env - Apache HTTP Server Version 2.5</title>
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<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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<body>
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<div id="page-header">
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
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<p class="apache">Apache HTTP Server Version 2.5</p>
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<img alt="" src="../images/feather.png" /></div>
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<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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<div id="path">
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<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.5</a> > <a href="./">Modules</a></div>
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<div id="page-content">
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<div id="preamble"><h1>Apache Module mod_env</h1>
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<div class="toplang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_env.html" title="English"> en </a> |
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<a href="../fr/mod/mod_env.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
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<a href="../ja/mod/mod_env.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
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<a href="../ko/mod/mod_env.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
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<a href="../tr/mod/mod_env.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p>
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</div>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Modifies the environment which is passed to CGI scripts and
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SSI pages</td></tr>
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<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
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<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>env_module</td></tr>
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<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_env.c</td></tr></table>
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<h3>Summary</h3>
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<p>This module allows for control of internal environment variables that
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are used by various Apache HTTP Server modules. These variables are also
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provided to CGI scripts as native system environment variables, and available
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for use in SSI pages. Environment variables may be passed from the shell
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which invoked the <code class="program"><a href="../programs/httpd.html">httpd</a></code> process. Alternatively,
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environment variables may be set or unset within the configuration process.</p>
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</div>
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<div id="quickview"><h3 class="directives">Directives</h3>
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<ul id="toc">
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<li><img alt="" src="../images/down.gif" /> <a href="#passenv">PassEnv</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#setenv">SetEnv</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#unsetenv">UnsetEnv</a></li>
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</ul>
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<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_env">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_env">Report a bug</a></li></ul><h3>See also</h3>
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<ul class="seealso">
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<li><a href="../env.html">Environment Variables</a></li>
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<li><code class="directive"><a href="../mod/mod_setenvif.html#setenvif">SetEnvIf</a></code></li>
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<li><a href="#comments_section">Comments</a></li></ul></div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="PassEnv" id="PassEnv">PassEnv</a> <a name="passenv" id="passenv">Directive</a> <a title="Permanent link" href="#passenv" class="permalink">¶</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Passes environment variables from the shell</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>PassEnv <var>env-variable</var> [<var>env-variable</var>]
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...</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
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<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_env</td></tr>
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</table>
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<p>Specifies one or more native system environment variables to make available
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as internal environment variables, which are available to Apache HTTP Server modules
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as well as propagated to CGI scripts and SSI pages. Values come from the
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native OS environment of the shell which invoked the
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<code class="program"><a href="../programs/httpd.html">httpd</a></code> process.</p>
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<div class="example"><h3>Example</h3><pre class="prettyprint lang-config">PassEnv LD_LIBRARY_PATH</pre>
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</div>
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</div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="SetEnv" id="SetEnv">SetEnv</a> <a name="setenv" id="setenv">Directive</a> <a title="Permanent link" href="#setenv" class="permalink">¶</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets environment variables</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SetEnv <var>env-variable</var> [<var>value</var>]</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
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<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_env</td></tr>
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</table>
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<p>Sets an internal environment variable, which is then available to Apache
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HTTP Server modules, and passed on to CGI scripts and SSI pages.</p>
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<div class="example"><h3>Example</h3><pre class="prettyprint lang-config">SetEnv SPECIAL_PATH /foo/bin</pre>
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</div>
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<p> If you omit the <var>value</var> argument, the variable is set to
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an empty string.</p>
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<div class="note"><p>The internal environment variables set by this directive are set
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<em>after</em> most early request processing directives are run, such as access
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control and URI-to-filename mapping. If the environment variable you're
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setting is meant as input into this early phase of processing such as the
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<code class="directive"><a href="../mod/mod_rewrite.html#rewriterule">RewriteRule</a></code> directive, you should
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instead set the environment variable with
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<code class="directive"><a href="../mod/mod_setenvif.html#setenvif">SetEnvIf</a></code>.</p>
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</div>
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<h3>See also</h3>
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<ul>
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<li><a href="../env.html">Environment Variables</a></li>
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</ul>
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</div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="UnsetEnv" id="UnsetEnv">UnsetEnv</a> <a name="unsetenv" id="unsetenv">Directive</a> <a title="Permanent link" href="#unsetenv" class="permalink">¶</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Removes variables from the environment</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>UnsetEnv <var>env-variable</var> [<var>env-variable</var>]
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...</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
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<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_env</td></tr>
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</table>
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<p>Removes one or more internal environment variables from those passed
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on to CGI scripts and SSI pages.</p>
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<div class="example"><h3>Example</h3><pre class="prettyprint lang-config">UnsetEnv LD_LIBRARY_PATH</pre>
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</div>
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</div>
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</div>
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<div class="bottomlang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_env.html" title="English"> en </a> |
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<a href="../fr/mod/mod_env.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
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<a href="../ja/mod/mod_env.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
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<a href="../ko/mod/mod_env.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
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<a href="../tr/mod/mod_env.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p>
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</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div>
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