Ticket #18660: canonical.5.patch

wp-includes/link-template.php

@@ -2355 +2355 @@
 }
 
 /**
- * Output rel=canonical for singular queries
+ * Output rel=canonical
  *
  * @package WordPress
  * @since 2.9.0
 */
 function rel_canonical() {
-        if ( !is_singular() )
-                return;
+        $link = false;
+        
+        if ( is_singular() ) {
+                $link = get_permalink( get_queried_object() );
+                if ( get_query_var('page') > 1 ) {
+                        if ( !$wp_rewrite->using_permalinks() ) {
+                                $link = add_query_arg( 'page', get_query_var('page'), $link );
+                        } else {
+                                $link = user_trailingslashit( trailingslashit( $link ) . get_query_var( 'page' ) );
+                        }
+                }
+        } else {
+                if ( is_front_page() ) {
+                        $link = home_url( '/' );
+                } else if ( is_home() && "page" == get_option('show_on_front') ) {
+                        $link = get_permalink( get_option( 'page_for_posts' ) );
+                } else if ( is_tax() || is_tag() || is_category() ) {
+                        $term = get_queried_object();
+                        $link = get_term_link( $term, $term->taxonomy );
+                } else if ( is_post_type_archive() ) {
+                        $link = get_post_type_archive_link( get_post_type() );
+                } else if ( is_author() ) {
+                        $link = get_author_posts_url( get_query_var('author') );
+                } else if ( is_archive() ) {
+                        if ( is_date() ) {
+                                if ( is_day() ) {
+                                        $link = get_day_link( get_query_var('year'), get_query_var('monthnum'), get_query_var('day') );
+                                } else if ( is_month() ) {
+                                        $link = get_month_link( get_query_var('year'), get_query_var('monthnum') );
+                                } else if ( is_year() ) {
+                                        $link = get_year_link( get_query_var('year') );
+                                }                                               
+                        }
+                }
+                
+                if ( $link && get_query_var('paged') > 1 ) {
+                        global $wp_rewrite;
+                        if ( !$wp_rewrite->using_permalinks() ) {
+                                $link = add_query_arg( 'paged', get_query_var('paged'), $link );
+                        } else {
+                                $link = user_trailingslashit( trailingslashit( $link ) . trailingslashit( $wp_rewrite->pagination_base ) . get_query_var('paged') );
+                        }
+                }
+        }
 
-        global $wp_the_query;
-        if ( !$id = $wp_the_query->get_queried_object_id() )
-                return;
-
-        $link = get_permalink( $id );
-        echo "<link rel='canonical' href='$link' />\n";
+        $link = apply_filters( 'rel_canonical', $link );
+        
+        if ( $link )
+                echo "<link rel='canonical' href='" . esc_attr( $link ) . "' />\n";
 }
 
 /**
@@ -2485 +2525 @@
         }
 }
 
-?>
+?>
+ No newline at end of file