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<title>Overview of new features in Apache 2.4 - Apache HTTP Server</title>
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<p class="apache">Apache HTTP Server Version 2.3</p>
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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 2.3</a></div><div id="page-content"><div id="preamble"><h1>Overview of new features in Apache 2.4</h1>
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  <p>This document describes some of the major changes between the
     2.2 and 2.4 versions of the Apache HTTP Server. For new features since
     version 2.0, see the <a href="new_features_2_2.html">2.2 new features</a>
     document.</p>
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<div id="quickview"><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#core">Core Enhancements</a></li>
<li><img alt="" src="./images/down.gif" /> <a href="#module">Module Enhancements</a></li>
<li><img alt="" src="./images/down.gif" /> <a href="#programs">Program Enhancements</a></li>
<li><img alt="" src="./images/down.gif" /> <a href="#developer">Module Developer Changes</a></li>
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<h2><a name="core" id="core">Core Enhancements</a></h2>
    
    
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<h2><a name="module" id="module">Module Enhancements</a></h2>
    
    
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<h2><a name="programs" id="programs">Program Enhancements</a></h2>
    
    
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<h2><a name="developer" id="developer">Module Developer Changes</a></h2>
    
    <dl>
      <dt>Check Configuration Hook Added</dt>

      <dd>A new hook, <code>check_config</code>, has been added which runs
          between the <code>pre_config</code> and <code>open_logs</code>
          hooks.  It also runs before the <code>test_config</code> hook
          when the <code>-t</code> option is passed to
          <code class="program"><a href="./programs/httpd.html">httpd</a></code>.  The <code>check_config</code> hook
          allows modules to review interdependent configuration directive
          values and adjust them while messages can still be logged to the
          console.  The user can thus be alerted to misconfiguration problems
          before the core <code>open_logs</code> hook function redirects
          console output to the error log.</dd>
    </dl>
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<p class="apache">Copyright 2008 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
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