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<title>[34272] trunk/src/wp-includes/canonical.php: Canonical: redirect URLs that match an attachment masked on the wrong URL to the attachment link for the matched attachment.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/34272">34272</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/34272","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>wonderboymusic</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2015-09-17 21:31:21 +0000 (Thu, 17 Sep 2015)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Canonical: redirect URLs that match an attachment masked on the wrong URL to the attachment link for the matched attachment.

Props solarissmoke.
Fixes <a href="https://core.trac.wordpress.org/ticket/19918">#19918</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludescanonicalphp">trunk/src/wp-includes/canonical.php</a></li>
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<h3>Diff</h3>
<a id="trunksrcwpincludescanonicalphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/canonical.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/canonical.php       2015-09-17 21:17:16 UTC (rev 34271)
+++ trunk/src/wp-includes/canonical.php 2015-09-17 21:31:21 UTC (rev 34272)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -150,9 +150,15 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        } elseif ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) {
</span><span class="cx" style="display: block; padding: 0 10px">                // rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( is_attachment() && !empty($_GET['attachment_id']) && ! $redirect_url ) {
-                       if ( $redirect_url = get_attachment_link(get_query_var('attachment_id')) )
-                               $redirect['query'] = remove_query_arg('attachment_id', $redirect['query']);
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( is_attachment() && ! $redirect_url ) {
+                       if ( ! empty( $_GET['attachment_id'] ) ) {
+                               $redirect_url = get_attachment_link( get_query_var( 'attachment_id' ) );
+                               if ( $redirect_url ) {
+                                       $redirect['query'] = remove_query_arg( 'attachment_id', $redirect['query'] );
+                               }
+                       } else {
+                               $redirect_url = get_attachment_link();
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px">                 } elseif ( is_single() && !empty($_GET['p']) && ! $redirect_url ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( $redirect_url = get_permalink(get_query_var('p')) )
</span><span class="cx" style="display: block; padding: 0 10px">                                $redirect['query'] = remove_query_arg(array('p', 'post_type'), $redirect['query']);
</span></span></pre>
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