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<title>Apache mod_rewrite Flags</title>

<summary>

<p>This document discusses the flags which are available to the

<directive module="mod_rewrite">RewriteRule</directive> directive,

providing more detailed explanations and examples of each.</p>

</summary>

<seealso><a href="/mod/mod_rewrite.html">Module documentation</a></seealso>

<seealso><a href="rewrite_tech.html">Technical details</a></seealso>

<seealso><a href="rewrite_guide.html">Rewrite Guide - useful examples</a></seealso>

<seealso><a href="rewrite_guide_advanced.html">Advanced Rewrite Guide -

advanced useful examples</a></seealso>

<section id="introduction"><title>Introduction</title>

<p><directive module="mod_rewrite">RewriteRule</directive>s can have

their behavior modified by one or more flags. Flags are included in

square brackets at the end of the rule, and multiple flags are separated

by commas.</p>

<example>

RewriteRule pattern target [Flag1,Flag2,Flag3]

</example>

<p>The flags all have a short form, such as <code>CO</code>, as well as

a longer form, such as <code>cookie</code>. Some flags take one or more

arguments. Flags are not case sensitive.</p>

</section>

<section id="flags"><title>The flags</title>

<p>Each flag has a long and short form. While it is most common to use

the short form, it is recommended that you familiarize yourself with the

long form, so that you remember what each flag is supposed to do.</p>

<p>Presented here are each of the available flags, along with an example

of how you might use them.</p>

<section id="flag_c"><title>C|chain</title>

<p>The [C] or [chain] flag indicates that the <directive

module="mod_rewrite">RewriteRule</directive> is chained to the next

rule. That is, if the rule matches, then it is processed as usual and

control moves on to the next rule. However, if it does not match, then

the next rule, and any other rules that are chained together, will be

skipped.</p>

</section>

<section id="flag_co"><title>CO|cookie</title>

<p>The [CO], or [cookie] flag, allows you to set a cookie when a

particular <directive module="mod_rewrite">RewriteRule</directive>

matches. The argument consists of three required fields and two optional

fields.</p>

<p>You must declare a name and value for the cookie to be set, and the

domain for which you wish the cookie to be valid. You may optionally set

the lifetime of the cookie, and the path for which it should be

returned.</p>

<p>By default, the lifetime of the cookie is the current browser

session.</p>

<p>By default, the path for which the cookie will be valid is "/" - that

is, the entire website.</p>

<p>Several examples are offered here:</p>

<example>

RewriteEngine On<br />

RewriteRule ^/index.html - [CO=frontdoor=yes:.apache.org:1440:/]

</example>

<p>This rule doesn't rewrite the request (the "-" rewrite target tells

mod_rewrite to pass the request through unchanged) but sets a cookie

called 'frontdoor' to a value of 'yes'. The cookie is valid for any host

in the <code>.apache.org</code> domain. It will be set to expire in 1440

minutes (24 hours) and will be returned for all URIs.</p>

</section>

<section id="flag_e"><title>E|env</title>

<p>With the [E], or [env] flag, you can set the value of an environment

variable. Note that some environment variables may be set after the rule

is run, thus unsetting what you have set. See <a href="/env.html">the

Environment Variables document</a> for more details on how Environment

variables work.</p>

<p>The following example sets an evironment variable called 'image' to a

value of '1' if the requested URI is an image file. Then, that

environment variable is used to exclude those requests from the access

log.</p>

<example>

RewriteRule %{REQUEST_URI} \.(png|gif|jpg) - [E=image:1]<br />

CustomLog logs/access_log combined env=!image

</example>

<p>Note that this same effect can be obtained using <directive

module="mod_setenvif">SetEnvIf</directive>. This technique is offered as

an example, not as a recommendation.</p>

</section>

<section id="flag_f"><title>F|forbidden</title>

<p>Forbidden flag</p>

</section>

<section id="flag_g"><title>G|gone</title>

<p>Gone flag</p>

</section>

<section id="flag_h"><title>H|handler</title>

<p>Handler flag</p>

</section>

<section id="flag_l"><title>L|last</title>

<p>Last flag</p>

</section>

<section id="flag_n"><title>N|next</title>

<p>Next round flag</p>

</section>

<section id="flag_nc"><title>NC|nocase</title>

<p>No case flag</p>

</section>

<section id="flag_ne"><title>NE|noescape</title>

<p>No escape flag</p>

</section>

<section id="flag_ns"><title>NS|nosubreq</title>

<p>No internal subrequest flag</p>

</section>

<section id="flag_p"><title>P|proxy</title>

<p>Proxy flag</p>

</section>

<section id="flag_pt"><title>PT|passthrough</title>

<p>Passthrough flag</p>

</section>

<section id="flag_pt"><title>PT|passthrough</title>

<p>Passthrough flag</p>

</section>

<section id="flag_qsa"><title>QSA|qsappend</title>

<p>Query String Append flag</p>

</section>

<section id="flag_r"><title>R|redirect</title>

<p>Redirect flag</p>

</section>

<section id="flag_s"><title>S|skip</title>

<p>Skip flag</p>

</section>

<section id="flag_t"><title>T|type</title>

<p>Type flag</p>

</section>

</section>

</manualpage>