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| <title>Apache mod_rewrite Introduction - Apache HTTP Server</title> |
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| <p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> |
| <p class="apache">Apache HTTP Server Version 2.0</p> |
| <img alt="" src="../images/feather.gif" /></div> |
| <div class="up"><a href="./index.html"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> |
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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 2.0</a></div><div id="page-content"><div class="retired"><h4>Please note</h4> |
| <p>This document refers to the <strong>2.0</strong> version of Apache httpd, which <strong>is no longer maintained</strong>. Upgrade, and refer to the current version of httpd instead, documented at:</p> |
| <ul><li><a href="http://httpd.apache.org/docs/current/">Current release version of Apache HTTP Server documentation</a></li></ul><p>You may follow <a href="http://httpd.apache.org/docs/current/rewrite/rewrite_intro.html">this link</a> to go to the current version of this document.</p></div><div id="preamble"><h1>Apache mod_rewrite Introduction</h1> |
| <div class="toplang"> |
| <p><span>Available Languages: </span><a href="../en/rewrite/rewrite_intro.html" title="English"> en </a></p> |
| </div> |
| |
| <p>This document supplements the <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code> |
| <a href="../mod/mod_rewrite.html">reference documentation</a>. It |
| describes the basic concepts necessary for use of |
| <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>. Other documents go into greater detail, |
| but this doc should help the beginner get their feet wet. |
| </p> |
| </div> |
| <div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#introduction">Introduction</a></li> |
| <li><img alt="" src="../images/down.gif" /> <a href="#regex">Regular Expressions</a></li> |
| <li><img alt="" src="../images/down.gif" /> <a href="#rewriterule">RewriteRule basics</a></li> |
| <li><img alt="" src="../images/down.gif" /> <a href="#flags">Rewrite Flags</a></li> |
| <li><img alt="" src="../images/down.gif" /> <a href="#rewritecond">Rewrite conditions</a></li> |
| <li><img alt="" src="../images/down.gif" /> <a href="#rewritemap">Rewrite maps</a></li> |
| <li><img alt="" src="../images/down.gif" /> <a href="#htaccess">.htaccess files</a></li> |
| <li><img alt="" src="../images/down.gif" /> <a href="#EnvVar">Environment Variables</a></li> |
| </ul><h3>See also</h3><ul class="seealso"><li><a href="../mod/mod_rewrite.html">Module |
| documentation</a></li><li><a href="rewrite_tech.html">Technical details</a></li><li><a href="rewrite_guide.html">Practical solutions to common |
| problems</a></li></ul></div> |
| <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="introduction" id="introduction">Introduction</a></h2> |
| <p>The Apache module <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code> is a very powerful and |
| sophisticated module which provides a way to do URL manipulations. With |
| it, you can do nearly all types of URL rewriting that you may need. It |
| is, however, somewhat complex, and may be intimidating to the beginner. |
| There is also a tendency to treat rewrite rules as magic incantation, |
| using them without actually understanding what they do.</p> |
| |
| <p>This document attempts to give sufficient background so that what |
| follows is understood, rather than just copied blindly. |
| </p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="regex" id="regex">Regular Expressions</a></h2> |
| <p>Basic regex building blocks</p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="rewriterule" id="rewriterule">RewriteRule basics</a></h2> |
| <p> |
| Basic anatomy of a RewriteRule, with exhaustively annotated simple |
| examples. |
| </p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="flags" id="flags">Rewrite Flags</a></h2> |
| <p>Discussion of the flags to RewriteRule, and when and why one might |
| use them.</p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="rewritecond" id="rewritecond">Rewrite conditions</a></h2> |
| <p>Discussion of RewriteCond, looping, and other related concepts. |
| </p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="rewritemap" id="rewritemap">Rewrite maps</a></h2> |
| <p>Discussion of RewriteMap, including simple, but heavily annotated, |
| examples.</p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="htaccess" id="htaccess">.htaccess files</a></h2> |
| <p>Discussion of the differences between rewrite rules in httpd.conf and |
| in .htaccess files.</p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="EnvVar" id="EnvVar">Environment Variables</a></h2> |
| |
| <p>This module keeps track of two additional (non-standard) |
| CGI/SSI environment variables named <code>SCRIPT_URL</code> |
| and <code>SCRIPT_URI</code>. These contain the |
| <em>logical</em> Web-view to the current resource, while the |
| standard CGI/SSI variables <code>SCRIPT_NAME</code> and |
| <code>SCRIPT_FILENAME</code> contain the <em>physical</em> |
| System-view. </p> |
| |
| <p>Notice: These variables hold the URI/URL <em>as they were |
| initially requested</em>, <em>i.e.</em>, <em>before</em> any |
| rewriting. This is important because the rewriting process is |
| primarily used to rewrite logical URLs to physical |
| pathnames.</p> |
| |
| <div class="example"><h3>Example</h3><pre> |
| SCRIPT_NAME=/sw/lib/w3s/tree/global/u/rse/.www/index.html |
| SCRIPT_FILENAME=/u/rse/.www/index.html |
| SCRIPT_URL=/u/rse/ |
| SCRIPT_URI=http://en1.engelschall.com/u/rse/ |
| </pre></div> |
| |
| </div></div> |
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| <p><span>Available Languages: </span><a href="../en/rewrite/rewrite_intro.html" title="English"> en </a></p> |
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| <p class="apache">Copyright 2013 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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