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<title>[13252] trunk/wp-includes/template-loader.php: Add template_include filter,
  to modify the template path before it is included.</title>
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<div id="msg">
<dl>
<dt>Revision</dt> <dd><a href="http://trac.wordpress.org/changeset/13252">13252</a></dd>
<dt>Author</dt> <dd>nacin</dd>
<dt>Date</dt> <dd>2010-02-20 12:58:25 +0000 (Sat, 20 Feb 2010)</dd>
</dl>

<h3>Log Message</h3>
<pre>Add template_include filter, to modify the template path before it is included. Fixes <a href="http://trac.wordpress.org/ticket/11242">#11242</a></pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkwpincludestemplateloaderphp">trunk/wp-includes/template-loader.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkwpincludestemplateloaderphp"></a>
<div class="modfile"><h4>Modified: trunk/wp-includes/template-loader.php (13251 => 13252)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/wp-includes/template-loader.php        2010-02-20 12:50:09 UTC (rev 13251)
+++ trunk/wp-includes/template-loader.php        2010-02-20 12:58:25 UTC (rev 13252)
</span><span class="lines">@@ -3,76 +3,44 @@
</span><span class="cx">  * Loads the correct template based on the visitor's url
</span><span class="cx">  * @package WordPress
</span><span class="cx">  */
</span><del>-if ( defined('WP_USE_THEMES') &amp;&amp; WP_USE_THEMES ) {
</del><ins>+if ( defined('WP_USE_THEMES') &amp;&amp; WP_USE_THEMES )
</ins><span class="cx">         do_action('template_redirect');
</span><del>-        if ( is_robots() ) {
-                do_action('do_robots');
-                return;
-        } else if ( is_feed() ) {
-                do_feed();
-                return;
-        } else if ( is_trackback() ) {
-                include(ABSPATH . 'wp-trackback.php');
-                return;
-        } else if ( is_404() &amp;&amp; $template = get_404_template() ) {
-                include($template);
-                return;
-        } else if ( is_search() &amp;&amp; $template = get_search_template() ) {
-                include($template);
-                return;
-        } else if ( is_tax() &amp;&amp; $template = get_taxonomy_template()) {
-                include($template);
-                return;
-        } else if ( is_home() &amp;&amp; $template = get_home_template() ) {
-                include($template);
-                return;
-        } else if ( is_attachment() &amp;&amp; $template = get_attachment_template() ) {
</del><ins>+
+// Process feeds and trackbacks even if not using themes.
+if ( is_robots() ) :
+        do_action('do_robots');
+        return;
+elseif ( is_feed() ) :
+        do_feed();
+        return;
+elseif ( is_trackback() ) :
+        include( ABSPATH . 'wp-trackback.php' );        
+        return;
+endif;
+
+if ( defined('WP_USE_THEMES') &amp;&amp; WP_USE_THEMES ) :
+        $template = false;
+        if     ( is_404()            &amp;&amp; $template = get_404_template()            ) :
+        elseif ( is_search()         &amp;&amp; $template = get_search_template()         ) :
+        elseif ( is_tax()            &amp;&amp; $template = get_taxonomy_template()       ) :
+        elseif ( is_home()           &amp;&amp; $template = get_home_template()           ) :
+        elseif ( is_attachment()     &amp;&amp; $template = get_attachment_template()     ) :
</ins><span class="cx">                 remove_filter('the_content', 'prepend_attachment');
</span><del>-                include($template);
-                return;
-        } else if ( is_single() &amp;&amp; $template = get_single_template() ) {
-                include($template);
-                return;
-        } else if ( is_page() &amp;&amp; $template = get_page_template() ) {
-                include($template);
-                return;
-        } else if ( is_category() &amp;&amp; $template = get_category_template()) {
-                include($template);
-                return;
-        } else if ( is_tag() &amp;&amp; $template = get_tag_template()) {
-                include($template);
-                return;
-        } else if ( is_author() &amp;&amp; $template = get_author_template() ) {
-                include($template);
-                return;
-        } else if ( is_date() &amp;&amp; $template = get_date_template() ) {
-                include($template);
-                return;
-        } else if ( is_archive() &amp;&amp; $template = get_archive_template() ) {
-                include($template);
-                return;
-        } else if ( is_comments_popup() &amp;&amp; $template = get_comments_popup_template() ) {
-                include($template);
-                return;
-        } else if ( is_paged() &amp;&amp; $template = get_paged_template() ) {
-                include($template);
-                return;
-        } else if ( file_exists(TEMPLATEPATH . &quot;/index.php&quot;) ) {
-                include(TEMPLATEPATH . &quot;/index.php&quot;);
-                return;
-        }
-} else {
-        // Process feeds and trackbacks even if not using themes.
-        if ( is_robots() ) {
-                do_action('do_robots');
-                return;
-        } else if ( is_feed() ) {
-                do_feed();
-                return;
-        } else if ( is_trackback() ) {
-                include(ABSPATH . 'wp-trackback.php');
-                return;
-        }
-}
</del><ins>+        elseif ( is_single()         &amp;&amp; $template = get_single_template()         ) :
+        elseif ( is_page()           &amp;&amp; $template = get_page_template()           ) :
+        elseif ( is_category()       &amp;&amp; $template = get_category_template()       ) :
+        elseif ( is_tag()            &amp;&amp; $template = get_tag_template()            ) :
+        elseif ( is_author()         &amp;&amp; $template = get_author_template()         ) :
+        elseif ( is_date()           &amp;&amp; $template = get_date_template()           ) :
+        elseif ( is_archive()        &amp;&amp; $template = get_archive_template()        ) :
+        elseif ( is_comments_popup() &amp;&amp; $template = get_comments_popup_template() ) :
+        elseif ( is_paged()          &amp;&amp; $template = get_paged_template()          ) :
+        elseif ( file_exists( TEMPLATEPATH . '/index.php' ) ) :
+                $template = TEMPLATEPATH . '/index.php';
+        endif;
+        if ( $template = apply_filters( 'template_include', $template ) )
+                include( $template );
+        return;
+endif;
</ins><span class="cx"> 
</span><span class="cx"> ?&gt;
</span><span class="cx">\ No newline at end of file
</span></span></pre>
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