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+<p class="apache">Apache HTTP Server Version 2.4</p>
+<img alt="" src="../images/feather.png" /></div>
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+<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.4</a> &gt; <a href="./">Modules</a></div>
+<div id="page-content">
+<div id="preamble"><h1>Apache Module mod_version</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_version.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_version.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ja/mod/mod_version.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
+<a href="../ko/mod/mod_version.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
+</div>
+<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Version dependent configuration</td></tr>
+<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>version_module</td></tr>
+<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_version.c</td></tr></table>
+<h3>Summary</h3>
+
+ <p>This module is designed for the use in test suites and large
+ networks which have to deal with different httpd versions and
+ different configurations. It provides a new container -- <code class="directive"><a href="#ifversion">&lt;IfVersion&gt;</a></code>, which
+ allows a flexible version checking including numeric comparisons and
+ regular expressions.</p>
+
+ <div class="example"><h3>Examples</h3><pre class="prettyprint lang-config">&lt;IfVersion 2.4.2&gt;
+ # current httpd version is exactly 2.4.2
+&lt;/IfVersion&gt;
+
+&lt;IfVersion &gt;= 2.5&gt;
+ # use really new features :-)
+&lt;/IfVersion&gt;</pre>
+</div>
+
+ <p>See below for further possibilities.</p>
+</div>
+<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3 class="directives">Directives</h3>
+<ul id="toc">
+<li><img alt="" src="../images/down.gif" /> <a href="#ifversion">&lt;IfVersion&gt;</a></li>
+</ul>
+<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__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_version">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_version">Report a bug</a></li></ul><h3>See also</h3>
+<ul class="seealso">
+<li><a href="#comments_section">Comments</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="IfVersion" id="IfVersion">&lt;IfVersion&gt;</a> <a name="ifversion" id="ifversion">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>contains version dependent configuration</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>&lt;IfVersion [[!]<var>operator</var>] <var>version</var>&gt; ...
+&lt;/IfVersion&gt;</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>All</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_version</td></tr>
+</table>
+ <p>The <code class="directive">&lt;IfVersion&gt;</code> section encloses
+ configuration directives which are executed only if the
+ <code class="program"><a href="../programs/httpd.html">httpd</a></code> version
+ matches the desired criteria. For normal (numeric) comparisons the
+ <var>version</var> argument has the format
+ <code><var>major</var>[.<var>minor</var>[.<var>patch</var>]]</code>, e.g.
+ <code>2.1.0</code> or <code>2.2</code>. <var>minor</var> and
+ <var>patch</var> are optional. If these numbers are omitted, they are
+ assumed to be zero. The following numerical <var>operator</var>s are
+ possible:</p>
+
+ <table class="bordered"><tr class="header"><th><var>operator</var></th><th>description</th></tr>
+<tr><td><code>=</code> or <code>==</code></td>
+ <td>httpd version is equal</td></tr>
+<tr class="odd"><td><code>&gt;</code></td>
+ <td>httpd version is greater than</td></tr>
+<tr><td><code>&gt;=</code></td>
+ <td>httpd version is greater or equal</td></tr>
+<tr class="odd"><td><code>&lt;</code></td>
+ <td>httpd version is less than</td></tr>
+<tr><td><code>&lt;=</code></td>
+ <td>httpd version is less or equal</td></tr>
+</table>
+
+ <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">&lt;IfVersion &gt;= 2.3&gt;
+ # this happens only in versions greater or
+ # equal 2.3.0.
+&lt;/IfVersion&gt;</pre>
+</div>
+
+ <p>Besides the numerical comparison it is possible to match a
+ <a class="glossarylink" href="../glossary.html#regex" title="see glossary">regular expression</a>
+ against the httpd version. There are two ways to write it:</p>
+
+ <table class="bordered"><tr class="header"><th><var>operator</var></th><th>description</th></tr>
+<tr><td><code>=</code> or <code>==</code></td>
+ <td><var>version</var> has the form
+ <code>/<var>regex</var>/</code></td></tr>
+<tr class="odd"><td><code>~</code></td>
+ <td><var>version</var> has the form
+ <code><var>regex</var></code></td></tr>
+</table>
+
+ <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">&lt;IfVersion = /^2.4.[01234]$/&gt;
+ # e.g. workaround for buggy versions
+&lt;/IfVersion&gt;</pre>
+</div>
+
+ <p>In order to reverse the meaning, all operators can be preceded by an
+ exclamation mark (<code>!</code>):</p>
+
+ <pre class="prettyprint lang-config">&lt;IfVersion !~ ^2.4.[01234]$&gt;
+ # not for those versions
+&lt;/IfVersion&gt;</pre>
+
+
+ <p>If the <var>operator</var> is omitted, it is assumed to be
+ <code>=</code>.</p>
+
+</div>
+</div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_version.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_version.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ja/mod/mod_version.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
+<a href="../ko/mod/mod_version.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
+</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&amp;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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