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  10 <title>mod_version - Apache HTTP Server Version 2.5</title>
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  21 <p class="apache">Apache HTTP Server Version 2.5</p>
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  26 <div id="page-content">
  27 <div id="preamble"><h1>Apache Module mod_version</h1>
  28 <div class="toplang">
  29 <p><span>Available Languages: </span><a href="../en/mod/mod_version.html" title="English">&nbsp;en&nbsp;</a> |
  30 <a href="../fr/mod/mod_version.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
  31 <a href="../ja/mod/mod_version.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
  32 <a href="../ko/mod/mod_version.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
  33 </div>
  34 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Version dependent configuration</td></tr>
  35 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  36 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>version_module</td></tr>
  37 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_version.c</td></tr></table>
  38 <h3>Summary</h3>
  39
  40     <p>This module is designed for the use in test suites and large
  41     networks which have to deal with different httpd versions and
  42     different configurations. It provides a new container -- <code class="directive"><a href="#ifversion">&lt;IfVersion&gt;</a></code>, which
  43     allows a flexible version checking including numeric comparisons and
  44     regular expressions.</p>
  45
  46     <div class="example"><h3>Examples</h3><pre class="prettyprint lang-config">&lt;IfVersion 2.4.2&gt;
  47     # current httpd version is exactly 2.4.2
  48 &lt;/IfVersion&gt;
  49
  50 &lt;IfVersion &gt;= 2.5&gt;
  51     # use really new features :-)
  52 &lt;/IfVersion&gt;</pre>
  53 </div>
  54
  55     <p>See below for further possibilities.</p>
  56 </div>
  57 <div id="quickview"><h3 class="directives">Directives</h3>
  58 <ul id="toc">
  59 <li><img alt="" src="../images/down.gif" /> <a href="#ifversion">&lt;IfVersion&gt;</a></li>
  60 </ul>
  61 <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>
  62 <ul class="seealso">
  63 <li><a href="#comments_section">Comments</a></li></ul></div>
  64
  65 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  66 <div class="directive-section"><h2><a name="IfVersion" id="IfVersion">&lt;IfVersion&gt;</a> <a name="ifversion" id="ifversion">Directive</a></h2>
  67 <table class="directive">
  68 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>contains version dependent configuration</td></tr>
  69 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>&lt;IfVersion [[!]<var>operator</var>] <var>version</var>&gt; ...
  70 &lt;/IfVersion&gt;</code></td></tr>
  71 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
  72 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
  73 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  74 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_version</td></tr>
  75 </table>
  76     <p>The <code class="directive">&lt;IfVersion&gt;</code> section encloses
  77     configuration directives which are executed only if the
  78     <code class="program"><a href="../programs/httpd.html">httpd</a></code> version
  79     matches the desired criteria. For normal (numeric) comparisons the
  80     <var>version</var> argument has the format
  81     <code><var>major</var>[.<var>minor</var>[.<var>patch</var>]]</code>, e.g.
  82     <code>2.1.0</code> or <code>2.2</code>. <var>minor</var> and
  83     <var>patch</var> are optional. If these numbers are omitted, they are
  84     assumed to be zero. The following numerical <var>operator</var>s are
  85     possible:</p>
  86
  87     <table class="bordered"><tr class="header"><th><var>operator</var></th><th>description</th></tr>
  88 <tr><td><code>=</code> or <code>==</code></td>
  89         <td>httpd version is equal</td></tr>
  90 <tr class="odd"><td><code>&gt;</code></td>
  91         <td>httpd version is greater than</td></tr>
  92 <tr><td><code>&gt;=</code></td>
  93         <td>httpd version is greater or equal</td></tr>
  94 <tr class="odd"><td><code>&lt;</code></td>
  95         <td>httpd version is less than</td></tr>
  96 <tr><td><code>&lt;=</code></td>
  97         <td>httpd version is less or equal</td></tr>
  98 </table>
  99
 100     <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">&lt;IfVersion &gt;= 2.3&gt;
 101     # this happens only in versions greater or
 102     # equal 2.3.0.
 103 &lt;/IfVersion&gt;</pre>
 104 </div>
 105
 106     <p>Besides the numerical comparison it is possible to match a
 107     <a class="glossarylink" href="../glossary.html#regex" title="see glossary">regular expression</a>
 108     against the httpd version. There are two ways to write it:</p>
 109
 110     <table class="bordered"><tr class="header"><th><var>operator</var></th><th>description</th></tr>
 111 <tr><td><code>=</code> or <code>==</code></td>
 112         <td><var>version</var> has the form
 113             <code>/<var>regex</var>/</code></td></tr>
 114 <tr class="odd"><td><code>~</code></td>
 115         <td><var>version</var> has the form
 116             <code><var>regex</var></code></td></tr>
 117 </table>
 118
 119     <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">&lt;IfVersion = /^2.4.[01234]$/&gt;
 120     # e.g. workaround for buggy versions
 121 &lt;/IfVersion&gt;</pre>
 122 </div>
 123
 124     <p>In order to reverse the meaning, all operators can be preceded by an
 125     exclamation mark (<code>!</code>):</p>
 126
 127     <pre class="prettyprint lang-config">&lt;IfVersion !~ ^2.4.[01234]$&gt;
 128     # not for those versions
 129 &lt;/IfVersion&gt;</pre>
 130
 131
 132     <p>If the <var>operator</var> is omitted, it is assumed to be
 133     <code>=</code>.</p>
 134
 135 </div>
 136 </div>
 137 <div class="bottomlang">
 138 <p><span>Available Languages: </span><a href="../en/mod/mod_version.html" title="English">&nbsp;en&nbsp;</a> |
 139 <a href="../fr/mod/mod_version.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
 140 <a href="../ja/mod/mod_version.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
 141 <a href="../ko/mod/mod_version.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
 142 </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 again 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 Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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