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	<title>Apache httpd/variables/Define - Revision history</title>
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	<updated>2026-07-24T06:51:35Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://htyp.org/mw/index.php?title=Apache_httpd/variables/Define&amp;diff=27990&amp;oldid=prev</id>
		<title>Woozle: Created page with &quot;==About== &#039;&#039;&#039;Defines&#039;&#039;&#039; are configuration variables which can be defined either in the command line or within configuration files.  Within a config file, the {{xmltag|Define}}...&quot;</title>
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		<updated>2022-04-01T16:20:30Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;==About== &amp;#039;&amp;#039;&amp;#039;Defines&amp;#039;&amp;#039;&amp;#039; are configuration variables which can be defined either in the command line or within configuration files.  Within a config file, the {{xmltag|Define}}...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;==About==&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Defines&amp;#039;&amp;#039;&amp;#039; are configuration variables which can be defined either in the command line or within configuration files.&lt;br /&gt;
&lt;br /&gt;
Within a config file, the {{xmltag|Define}} directive is used to define a variable (optionally giving it a value, and the {{xmltag|IfDefine}} directive allows sections of config code to be selectively executed.&lt;br /&gt;
&lt;br /&gt;
The {{xmltag|IfDefine}} directive supports an optional &amp;quot;!&amp;quot; prefix on its sole parameter, which means &amp;quot;does not exist&amp;quot; rather than &amp;quot;is not true&amp;quot;.&lt;br /&gt;
==Links==&lt;br /&gt;
* [https://httpd.apache.org/docs/2.4/mod/core.html#define core: &amp;amp;lt;Define&amp;amp;gt; Directive]&lt;br /&gt;
* [https://httpd.apache.org/docs/2.4/mod/core.html#ifdefine core: &amp;amp;lt;IfDefine&amp;amp;gt; Directive]&lt;/div&gt;</summary>
		<author><name>Woozle</name></author>
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