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<modulesynopsis metafile="mod_substitute.xml.meta">

<name>mod_substitute</name>
<description>Perform search and replace operations on response bodies</description>
<status>Extension</status>
<sourcefile>mod_substitute.c</sourcefile>
<identifier>substitute_module</identifier>
<compatibility>Available in Apache 2.2.7 and later</compatibility>

<summary>
    <p><module>mod_substitute</module> provides a mechanism to perform
    both regular expression and fixed string substitutions on
    response bodies.</p>
</summary>

<directivesynopsis>
<name>Substitute</name>
<description>Pattern to filter the response content</description>
<syntax>Substitute <var>s/pattern/substitution/[infq]</var></syntax>
<contextlist><context>directory</context>
<context>.htaccess</context></contextlist>
<override>FileInfo</override>

<usage>
    <p>The <directive>Substitute</directive> directive specifies a
    search and replace pattern to apply to the response body.</p>
    
    <p>The meaning of the pattern can be modified by using any
    combination of these flags:</p>
    
    <dl>
        <dt><code>i</code></dt>
        <dd>Perform a case-insensitive match.</dd>
        <dt><code>n</code></dt>
        <dd>By default the pattern is treated as a regular expression.
        Using the <code>n</code> flag forces the pattern to be treated
        as a fixed string.</dd>
        <dt><code>f</code></dt>
        <dd>The <code>f</code> flag causes mod_substitute to flatten the
        result of a substitution allowing for later substitutions to
        take place on the boundary of this one. This is the default.</dd>
        <dt><code>q</code></dt>
        <dd>The <code>q</code> flag causes mod_substitute to not
        flatten the buckets after each substitution. This can
        result in much faster response and a decrease in memory
        utilization, but should only be used if there is no possibility
        that the result of one substitution will ever match a pattern
        or regex of a subsequent one.</dd>
    </dl>
    
    <example><title>Example</title>
        &lt;Location /&gt;
        <indent>
            AddOutputFilterByType SUBSTITUTE text/html<br />
            Substitute s/foo/bar/ni<br />
        </indent>
        &lt;/Location&gt;
    </example>
    
    <p>If either the pattern or the substitution contain a slash
    character then an alternative delimiter should be used:</p>
    
    <example><title>Example of using an alternate delimiter</title>
        &lt;Location /&gt;
        <indent>
            AddOutputFilterByType SUBSTITUTE text/html<br />
            Substitute "s|&lt;BR */?&gt;|&lt;br /&gt;|i"
        </indent>
        &lt;/Location&gt;
    </example>
</usage>
</directivesynopsis>

</modulesynopsis>
