* Based on "Permalink Redirect" from Scott Yang and "Enforce www. Preference"
* by Mark Jaquith
*
- * @author Scott Yang
- * @author Mark Jaquith
* @package WordPress
* @since 2.3.0
*/
* @return null|false|string Null, if redirect not needed. False, if redirect
* not needed or the string of the URL
*/
-function redirect_canonical($requested_url=null, $do_redirect=true) {
+function redirect_canonical( $requested_url = null, $do_redirect = true ) {
global $wp_rewrite, $is_IIS, $wp_query, $wpdb;
- if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || $is_IIS || ( isset($_POST) && count($_POST) ) || is_preview() || is_robots() )
+ if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || !empty($_POST) || is_preview() || is_robots() || $is_IIS )
return;
if ( !$requested_url ) {
// build the URL in the address bar
- $requested_url = ( !empty($_SERVER['HTTPS'] ) && strtolower($_SERVER['HTTPS']) == 'on' ) ? 'https://' : 'http://';
+ $requested_url = is_ssl() ? 'https://' : 'http://';
$requested_url .= $_SERVER['HTTP_HOST'];
$requested_url .= $_SERVER['REQUEST_URI'];
}
$redirect_url = false;
// Notice fixing
- if ( !isset($redirect['path']) ) $redirect['path'] = '';
- if ( !isset($redirect['query']) ) $redirect['query'] = '';
+ if ( !isset($redirect['path']) )
+ $redirect['path'] = '';
+ if ( !isset($redirect['query']) )
+ $redirect['query'] = '';
if ( is_singular() && 1 > $wp_query->post_count && ($id = get_query_var('p')) ) {
$id = $vars->post_parent;
if ( $redirect_url = get_permalink($id) )
- $redirect['query'] = remove_query_arg(array('p', 'page_id', 'attachment_id'), $redirect['query']);
+ $redirect['query'] = remove_query_arg(array('p', 'page_id', 'attachment_id', 'post_type'), $redirect['query']);
}
}
// These tests give us a WP-generated permalink
if ( is_404() ) {
- $redirect_url = redirect_guess_404_permalink();
+
+ // Redirect ?page_id, ?p=, ?attachment_id= to their respective url's
+ $id = max( get_query_var('p'), get_query_var('page_id'), get_query_var('attachment_id') );
+ if ( $id && $redirect_post = get_post($id) ) {
+ $post_type_obj = get_post_type_object($redirect_post->post_type);
+ if ( $post_type_obj->public ) {
+ $redirect_url = get_permalink($redirect_post);
+ $redirect['query'] = remove_query_arg(array('p', 'page_id', 'attachment_id', 'post_type'), $redirect['query']);
+ }
+ }
+
+ if ( ! $redirect_url )
+ $redirect_url = redirect_guess_404_permalink();
+
} elseif ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) {
// rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101
if ( is_attachment() && !empty($_GET['attachment_id']) && ! $redirect_url ) {
$redirect['query'] = remove_query_arg('attachment_id', $redirect['query']);
} elseif ( is_single() && !empty($_GET['p']) && ! $redirect_url ) {
if ( $redirect_url = get_permalink(get_query_var('p')) )
- $redirect['query'] = remove_query_arg('p', $redirect['query']);
- if ( get_query_var( 'page' ) ) {
- $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' );
- $redirect['query'] = remove_query_arg( 'page', $redirect['query'] );
- }
+ $redirect['query'] = remove_query_arg(array('p', 'post_type'), $redirect['query']);
} elseif ( is_single() && !empty($_GET['name']) && ! $redirect_url ) {
if ( $redirect_url = get_permalink( $wp_query->get_queried_object_id() ) )
$redirect['query'] = remove_query_arg('name', $redirect['query']);
} elseif ( is_page() && !empty($_GET['page_id']) && ! $redirect_url ) {
if ( $redirect_url = get_permalink(get_query_var('page_id')) )
$redirect['query'] = remove_query_arg('page_id', $redirect['query']);
+ } elseif ( is_page() && !is_feed() && isset($wp_query->queried_object) && 'page' == get_option('show_on_front') && $wp_query->queried_object->ID == get_option('page_on_front') && ! $redirect_url ) {
+ $redirect_url = home_url('/');
+ } elseif ( is_home() && !empty($_GET['page_id']) && 'page' == get_option('show_on_front') && get_query_var('page_id') == get_option('page_for_posts') && ! $redirect_url ) {
+ if ( $redirect_url = get_permalink(get_option('page_for_posts')) )
+ $redirect['query'] = remove_query_arg('page_id', $redirect['query']);
} elseif ( !empty($_GET['m']) && ( is_year() || is_month() || is_day() ) ) {
$m = get_query_var('m');
switch ( strlen($m) ) {
} elseif ( is_year() && !empty($_GET['year']) ) {
if ( $redirect_url = get_year_link(get_query_var('year')) )
$redirect['query'] = remove_query_arg('year', $redirect['query']);
- } elseif ( is_category() && !empty($_GET['cat']) && preg_match( '|^[0-9]+$|', $_GET['cat'] ) ) {
- if ( $redirect_url = get_category_link(get_query_var('cat')) )
- $redirect['query'] = remove_query_arg('cat', $redirect['query']);
} elseif ( is_author() && !empty($_GET['author']) && preg_match( '|^[0-9]+$|', $_GET['author'] ) ) {
$author = get_userdata(get_query_var('author'));
- if ( false !== $author && $redirect_url = get_author_posts_url($author->ID, $author->user_nicename) )
- $redirect['query'] = remove_query_arg('author', $redirect['author']);
+ if ( ( false !== $author ) && $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE $wpdb->posts.post_author = %d AND $wpdb->posts.post_status = 'publish' LIMIT 1", $author->ID ) ) ) {
+ if ( $redirect_url = get_author_posts_url($author->ID, $author->user_nicename) )
+ $redirect['query'] = remove_query_arg('author', $redirect['query']);
+ }
+ } elseif ( is_category() || is_tag() || is_tax() ) { // Terms (Tags/categories)
+
+ $term_count = 0;
+ foreach ( $wp_query->tax_query->queries as $tax_query )
+ $term_count += count( $tax_query['terms'] );
+
+ $obj = $wp_query->get_queried_object();
+ if ( $term_count <= 1 && !empty($obj->term_id) && ( $tax_url = get_term_link((int)$obj->term_id, $obj->taxonomy) ) && !is_wp_error($tax_url) && !empty($redirect['query']) ) {
+ if ( !empty($redirect['query']) ) {
+ if ( is_category() ) {
+ $redirect['query'] = remove_query_arg( array( 'category_name', 'category', 'cat'), $redirect['query']);
+ } elseif ( is_tag() ) {
+ $redirect['query'] = remove_query_arg( array( 'tag', 'tag_id'), $redirect['query']);
+ } elseif ( is_tax() ) { // Custom taxonomies will have a custom query var, remove those too:
+ $tax = get_taxonomy( $obj->taxonomy );
+ if ( false !== $tax->query_var)
+ $redirect['query'] = remove_query_arg($tax->query_var, $redirect['query']);
+ else
+ $redirect['query'] = remove_query_arg( array( 'term', 'taxonomy'), $redirect['query']);
+ }
+ }
+ $tax_url = parse_url($tax_url);
+ if ( ! empty($tax_url['query']) ) { // Custom taxonomies may only be accessable via ?taxonomy=..&term=..
+ parse_str($tax_url['query'], $query_vars);
+ $redirect['query'] = add_query_arg($query_vars, $redirect['query']);
+ } else { // Taxonomy is accessable via a "pretty-URL"
+ $redirect['path'] = $tax_url['path'];
+ }
+ }
+ } elseif ( is_single() && strpos($wp_rewrite->permalink_structure, '%category%') !== false ) {
+ $category = get_category_by_path(get_query_var('category_name'));
+ $post_terms = wp_get_object_terms($wp_query->get_queried_object_id(), 'category', array('fields' => 'tt_ids'));
+ if ( (!$category || is_wp_error($category)) || ( !is_wp_error($post_terms) && !empty($post_terms) && !in_array($category->term_taxonomy_id, $post_terms) ) )
+ $redirect_url = get_permalink($wp_query->get_queried_object_id());
}
- // paging and feeds
+ // Post Paging
+ if ( is_singular() && get_query_var('page') && $redirect_url ) {
+ $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' );
+ $redirect['query'] = remove_query_arg( 'page', $redirect['query'] );
+ }
+
+ // paging and feeds
if ( get_query_var('paged') || is_feed() || get_query_var('cpage') ) {
- if ( !$redirect_url )
- $redirect_url = $requested_url;
- $paged_redirect = @parse_url($redirect_url);
- while ( preg_match( '#/page/[0-9]+?(/+)?$#', $paged_redirect['path'] ) || preg_match( '#/(comments/?)?(feed|rss|rdf|atom|rss2)(/+)?$#', $paged_redirect['path'] ) || preg_match( '#/comment-page-[0-9]+(/+)?$#', $paged_redirect['path'] ) ) {
+ while ( preg_match( "#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", $redirect['path'] ) || preg_match( '#/(comments/?)?(feed|rss|rdf|atom|rss2)(/+)?$#', $redirect['path'] ) || preg_match( '#/comment-page-[0-9]+(/+)?$#', $redirect['path'] ) ) {
// Strip off paging and feed
- $paged_redirect['path'] = preg_replace('#/page/[0-9]+?(/+)?$#', '/', $paged_redirect['path']); // strip off any existing paging
- $paged_redirect['path'] = preg_replace('#/(comments/?)?(feed|rss2?|rdf|atom)(/+|$)#', '/', $paged_redirect['path']); // strip off feed endings
- $paged_redirect['path'] = preg_replace('#/comment-page-[0-9]+?(/+)?$#', '/', $paged_redirect['path']); // strip off any existing comment paging
+ $redirect['path'] = preg_replace("#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", '/', $redirect['path']); // strip off any existing paging
+ $redirect['path'] = preg_replace('#/(comments/?)?(feed|rss2?|rdf|atom)(/+|$)#', '/', $redirect['path']); // strip off feed endings
+ $redirect['path'] = preg_replace('#/comment-page-[0-9]+?(/+)?$#', '/', $redirect['path']); // strip off any existing comment paging
}
$addl_path = '';
- if ( is_feed() ) {
+ if ( is_feed() && in_array( get_query_var('feed'), $wp_rewrite->feeds ) ) {
$addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : '';
if ( get_query_var( 'withcomments' ) )
$addl_path .= 'comments/';
- $addl_path .= user_trailingslashit( 'feed/' . ( ( 'rss2' == get_query_var('feed') || 'feed' == get_query_var('feed') ) ? '' : get_query_var('feed') ), 'feed' );
+ $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == get_query_var('feed') || 'feed' == get_query_var('feed') ) ? '' : get_query_var('feed') ), 'feed' );
$redirect['query'] = remove_query_arg( 'feed', $redirect['query'] );
}
$redirect['query'] = remove_query_arg( 'paged', $redirect['query'] );
if ( !is_feed() ) {
if ( $paged > 1 && !is_single() ) {
- $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit("page/$paged", 'paged');
+ $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit("$wp_rewrite->pagination_base/$paged", 'paged');
} elseif ( !is_single() ) {
- $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit($paged_redirect['path'], 'paged');
+ $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : '';
}
} elseif ( $paged > 1 ) {
$redirect['query'] = add_query_arg( 'paged', $paged, $redirect['query'] );
$redirect['query'] = remove_query_arg( 'cpage', $redirect['query'] );
}
- $paged_redirect['path'] = user_trailingslashit( preg_replace('|/index.php/?$|', '/', $paged_redirect['path']) ); // strip off trailing /index.php/
- if ( !empty( $addl_path ) && $wp_rewrite->using_index_permalinks() && strpos($paged_redirect['path'], '/index.php/') === false )
- $paged_redirect['path'] = trailingslashit($paged_redirect['path']) . 'index.php/';
+ $redirect['path'] = user_trailingslashit( preg_replace('|/index.php/?$|', '/', $redirect['path']) ); // strip off trailing /index.php/
+ if ( !empty( $addl_path ) && $wp_rewrite->using_index_permalinks() && strpos($redirect['path'], '/index.php/') === false )
+ $redirect['path'] = trailingslashit($redirect['path']) . 'index.php/';
if ( !empty( $addl_path ) )
- $paged_redirect['path'] = trailingslashit($paged_redirect['path']) . $addl_path;
- $redirect_url = $paged_redirect['scheme'] . '://' . $paged_redirect['host'] . $paged_redirect['path'];
- $redirect['path'] = $paged_redirect['path'];
+ $redirect['path'] = trailingslashit($redirect['path']) . $addl_path;
+ $redirect_url = $redirect['scheme'] . '://' . $redirect['host'] . $redirect['path'];
}
}
// tack on any additional query vars
$redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] );
if ( $redirect_url && !empty($redirect['query']) ) {
- if ( strpos($redirect_url, '?') !== false )
- $redirect_url .= '&';
- else
- $redirect_url .= '?';
- $redirect_url .= $redirect['query'];
+ parse_str( $redirect['query'], $_parsed_query );
+ $redirect = @parse_url($redirect_url);
+
+ if ( ! empty( $_parsed_query['name'] ) && ! empty( $redirect['query'] ) ) {
+ parse_str( $redirect['query'], $_parsed_redirect_query );
+
+ if ( empty( $_parsed_redirect_query['name'] ) )
+ unset( $_parsed_query['name'] );
+ }
+
+ $redirect_url = add_query_arg( $_parsed_query, $redirect_url );
}
if ( $redirect_url )
$redirect = @parse_url($redirect_url);
// www.example.com vs example.com
- $user_home = @parse_url(get_option('home'));
+ $user_home = @parse_url(home_url());
if ( !empty($user_home['host']) )
$redirect['host'] = $user_home['host'];
if ( empty($user_home['path']) )
$redirect['path'] = trailingslashit($redirect['path']);
}
+ // Strip multiple slashes out of the URL
+ if ( strpos($redirect['path'], '//') > -1 )
+ $redirect['path'] = preg_replace('|/+|', '/', $redirect['path']);
+
// Always trailing slash the Front Page URL
if ( trailingslashit( $redirect['path'] ) == trailingslashit( $user_home['path'] ) )
$redirect['path'] = trailingslashit($redirect['path']);
$redirect_url .= '?' . $redirect['query'];
}
- if ( $redirect_url == $requested_url )
+ if ( !$redirect_url || $redirect_url == $requested_url )
return false;
+ // Hex encoded octets are case-insensitive.
+ if ( false !== strpos($requested_url, '%') ) {
+ if ( !function_exists('lowercase_octets') ) {
+ function lowercase_octets($matches) {
+ return strtolower( $matches[0] );
+ }
+ }
+ $requested_url = preg_replace_callback('|%[a-fA-F0-9][a-fA-F0-9]|', 'lowercase_octets', $requested_url);
+ }
+
// Note that you can use the "redirect_canonical" filter to cancel a canonical redirect for whatever reason by returning FALSE
$redirect_url = apply_filters('redirect_canonical', $redirect_url, $requested_url);
if ( !get_query_var('name') )
return false;
- $where = $wpdb->prepare("post_name LIKE %s", get_query_var('name') . '%');
+ $where = $wpdb->prepare("post_name LIKE %s", like_escape( get_query_var('name') ) . '%');
- // if any of year, monthnum, or day are set, use them to refine the query
+ // if any of post_type, year, monthnum, or day are set, use them to refine the query
+ if ( get_query_var('post_type') )
+ $where .= $wpdb->prepare(" AND post_type = %s", get_query_var('post_type'));
if ( get_query_var('year') )
$where .= $wpdb->prepare(" AND YEAR(post_date) = %d", get_query_var('year'));
if ( get_query_var('monthnum') )
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