Ticket #4209: 4209.2.diff

wp-includes/link-template.php

@@ -1207 +1207 @@
 
         $title = apply_filters('the_title', $title, $post);
         $date = mysql2date(get_option('date_format'), $post->post_date);
+        $rel = $previous ? 'prev' : 'next';
 
         $string = '<a href="'.get_permalink($post).'">';
         $link = str_replace('%title', $title, $link);
@@ -1216 +1217 @@
         $format = str_replace('%link', $link, $format);
 
         $adjacent = $previous ? 'previous' : 'next';
-        echo apply_filters( "{$adjacent}_post_link", $format, $link );
+        $result = apply_filters( "{$adjacent}_post_link", $format, $link );
+        if ( !preg_match('/\\brel=/', $result) ) {
+                $result = str_replace('<a ', '<a rel="'.$rel.'" ', $result);
+        }
+
+        echo $result;
 }
 
 /**