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<title>mod_setenvif - Apache HTTP Server</title>
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<div id="preamble"><h1>Apache Module mod_setenvif</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_setenvif.html" title="English"> en </a> |
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Allows the setting of environment variables based
on characteristics of the request</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module營dentifier:</a></th><td>setenvif_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source燜ile:</a></th><td>mod_setenvif.c</td></tr></table>
<h3>Summary</h3>
<p>The <code class="module"><a href="../mod/mod_setenvif.html">mod_setenvif</a></code> module allows you to set
environment variables according to whether different aspects of
the request match regular expressions you specify. These
environment variables can be used by other parts of the server
to make decisions about actions to be taken.</p>
<p>The directives are considered in the order they appear in
the configuration files. So more complex sequences can be used,
such as this example, which sets <code>netscape</code> if the
browser is mozilla but not MSIE.</p>
<div class="example"><p><code>
BrowserMatch ^Mozilla netscape<br />
BrowserMatch MSIE !netscape<br />
</code></p></div>
</div>
<div id="quickview"><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#browsermatch">BrowserMatch</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#browsermatchnocase">BrowserMatchNoCase</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#setenvif">SetEnvIf</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#setenvifnocase">SetEnvIfNoCase</a></li>
</ul>
<h3>See also</h3>
<ul class="seealso">
<li><a href="../env.html">Environment Variables in Apache</a></li>
</ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="BrowserMatch" id="BrowserMatch">BrowserMatch</a> <a name="browsermatch" id="browsermatch">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets environment variables conditional on HTTP User-Agent
</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>BrowserMatch <em>regex [!]env-variable</em>[=<em>value</em>]
[[!]<em>env-variable</em>[=<em>value</em>]] ...</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_setenvif</td></tr>
</table>
<p>The <code class="directive">BrowserMatch</code> is a special cases of the
<code class="directive"><a href="#setenvif">SetEnvIf</a></code> directive that
sets environment variables conditional on the
<code>User-Agent</code> HTTP request header. The following two
lines have the same effect:</p>
<div class="example"><p><code>
BrowserMatchNoCase Robot is_a_robot<br />
SetEnvIfNoCase User-Agent Robot is_a_robot<br />
</code></p></div>
<p>Some additional examples:</p>
<div class="example"><p><code>
BrowserMatch ^Mozilla forms jpeg=yes browser=netscape<br />
BrowserMatch "^Mozilla/[2-3]" tables agif frames javascript<br />
BrowserMatch MSIE !javascript<br />
</code></p></div>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="BrowserMatchNoCase" id="BrowserMatchNoCase">BrowserMatchNoCase</a> <a name="browsermatchnocase" id="browsermatchnocase">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets environment variables conditional on User-Agent without
respect to case</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>BrowserMatchNoCase <em>regex [!]env-variable</em>[=<em>value</em>]
[[!]<em>env-variable</em>[=<em>value</em>]] ...</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_setenvif</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Apache 1.2 and
above (in Apache 1.2 this directive was found in the
now-obsolete mod_browser module)</td></tr>
</table>
<p>The <code class="directive">BrowserMatchNoCase</code> directive is
semantically identical to the <code class="directive"><a href="#browsermatch">BrowserMatch</a></code> directive.
However, it provides for case-insensitive matching. For
example:</p>
<div class="example"><p><code>
BrowserMatchNoCase mac platform=macintosh<br />
BrowserMatchNoCase win platform=windows<br />
</code></p></div>
<p>The <code class="directive">BrowserMatch</code> and
<code class="directive">BrowserMatchNoCase</code> directives are special cases of
the <code class="directive"><a href="#setenvif">SetEnvIf</a></code> and <code class="directive"><a href="#setenvifnocase">SetEnvIfNoCase</a></code>
directives. The following two lines have the same effect:</p>
<div class="example"><p><code>
BrowserMatchNoCase Robot is_a_robot<br />
SetEnvIfNoCase User-Agent Robot is_a_robot<br />
</code></p></div>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="SetEnvIf" id="SetEnvIf">SetEnvIf</a> <a name="setenvif" id="setenvif">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets environment variables based on attributes of the request
</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SetEnvIf <em>attribute
regex [!]env-variable</em>[=<em>value</em>]
[[!]<em>env-variable</em>[=<em>value</em>]] ...</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_setenvif</td></tr>
</table>
<p>The <code class="directive">SetEnvIf</code> directive defines
environment variables based on attributes of the request. The
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