using_permalinks() ) { // rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101 if ( is_single() && isset($_GET['p']) ) { if ( $redirect_url = get_permalink(get_query_var('p')) ) $redirect['query'] = remove_query_arg('p', $redirect['query']); } elseif ( is_page() && isset($_GET['page_id']) ) { if ( $redirect_url = get_permalink(get_query_var('page_id')) ) $redirect['query'] = remove_query_arg('page_id', $redirect['query']); } elseif ( isset($_GET['m']) && ( is_year() || is_month() || is_day() ) ) { $m = get_query_var('m'); switch ( strlen($m) ) { case 4: // Yearly $redirect_url = get_year_link($m); break; case 6: // Monthly $redirect_url = get_month_link( substr($m, 0, 4), substr($m, 4, 2) ); break; case 8: // Daily $redirect_url = get_day_link(substr($m, 0, 4), substr($m, 4, 2), substr($m, 6, 2)); break; } if ( $redirect_url ) $redirect['query'] = remove_query_arg('m', $redirect['query']); // now moving on to non ?m=X year/month/day links } elseif ( is_day() && get_query_var('year') && get_query_var('monthnum') && isset($_GET['day']) ) { if ( $redirect_url = get_day_link(get_query_var('year'), get_query_var('monthnum'), get_query_var('day')) ) $redirect['query'] = remove_query_arg(array('year', 'monthnum', 'day'), $redirect['query']); } elseif ( is_month() && get_query_var('year') && isset($_GET['monthnum']) ) { if ( $redirect_url = get_month_link(get_query_var('year'), get_query_var('monthnum')) ) $redirect['query'] = remove_query_arg(array('year', 'monthnum'), $redirect['query']); } elseif ( is_year() && isset($_GET['year']) ) { if ( $redirect_url = get_year_link(get_query_var('year')) ) $redirect['query'] = remove_query_arg('year', $redirect['query']); } elseif ( is_category() && isset($_GET['cat']) ) { if ( $redirect_url = get_category_link(get_query_var('cat')) ) $redirect['query'] = remove_query_arg('cat', $redirect['query']); } elseif ( is_author() && isset($_GET['author']) ) { $author = get_userdata(get_query_var('author')); if ( false !== $author && $redirect_url = get_author_link(false, $author->ID, $author->user_nicename) ) $redirect['query'] = remove_query_arg('author', $redirect['author']); } // paging if ( $paged = get_query_var('paged') ) { if ( $paged > 0 ) { if ( !$redirect_url ) $redirect_url = $requested_url; $paged_redirect = @parse_url($redirect_url); $paged_redirect['path'] = preg_replace('|/page/[0-9]+?(/+)?$|', '/', $paged_redirect['path']); // strip off any existing paging $paged_redirect['path'] = preg_replace('|/index.php/?$|', '/', $paged_redirect['path']); // strip off trailing /index.php/ if ( $paged > 1 && !is_single() ) { $paged_redirect['path'] = trailingslashit($paged_redirect['path']); if ( $wp_rewrite->using_index_permalinks() && strpos($paged_redirect['path'], '/index.php/') === false ) $paged_redirect['path'] .= 'index.php/'; $paged_redirect['path'] .= user_trailingslashit("page/$paged", 'paged'); } elseif ( !is_home() && !is_single() ){ $paged_redirect['path'] = user_trailingslashit($paged_redirect['path'], 'paged'); } $redirect_url = $paged_redirect['scheme'] . '://' . $paged_redirect['host'] . $paged_redirect['path']; $redirect['path'] = $paged_redirect['path']; } $redirect['query'] = remove_query_arg('paged', $redirect['query']); } } // tack on any additional query vars if ( $redirect_url && $redirect['query'] ) { if ( strpos($redirect_url, '?') !== false ) $redirect_url .= '&'; else $redirect_url .= '?'; $redirect_url .= $redirect['query']; } if ( $redirect_url ) $redirect = @parse_url($redirect_url); // www.example.com vs example.com $user_home = @parse_url(get_option('home')); if ( isset($user_home['host']) ) $redirect['host'] = $user_home['host']; // Handle ports if ( isset($user_home['port']) ) $redirect['port'] = $user_home['port']; else unset($redirect['port']); // trailing /index.php/ $redirect['path'] = preg_replace('|/index.php/$|', '/', $redirect['path']); // Remove trailing spaces from the path $redirect['path'] = preg_replace( '#(%20| )+$#', '', $redirect['path'] ); if ( isset( $redirect['query'] ) ) { // Remove trailing slashes from certain terminating query string args $redirect['query'] = preg_replace( '#((p|page_id|cat|tag)=[^&]*?)(%20| )+$#', '$1', $redirect['query'] ); // Clean up empty query strings $redirect['query'] = preg_replace( '#&?(p|page_id|cat|tag)=?$#', '', $redirect['query'] ); } // strip /index.php/ when we're not using PATHINFO permalinks if ( !$wp_rewrite->using_index_permalinks() ) $redirect['path'] = str_replace('/index.php/', '/', $redirect['path']); // trailing slashes if ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() && !is_404() && (!is_home() || ( is_home() && (get_query_var('paged') > 1) ) ) ) { $user_ts_type = ''; if ( get_query_var('paged') > 0 ) { $user_ts_type = 'paged'; } else { foreach ( array('single', 'category', 'page', 'day', 'month', 'year') as $type ) { $func = 'is_' . $type; if ( call_user_func($func) ) { $user_ts_type = $type; break; } } } $redirect['path'] = user_trailingslashit($redirect['path'], $user_ts_type); } elseif ( is_home() ) { $redirect['path'] = trailingslashit($redirect['path']); } // Always trailing slash the 'home' URL if ( $redirect['path'] == $user_home['path'] ) $redirect['path'] = trailingslashit($redirect['path']); // Ignore differences in host capitalization, as this can lead to infinite redirects if ( strtolower($original['host']) == strtolower($redirect['host']) ) $redirect['host'] = $original['host']; $compare_original = array($original['host'], $original['path']); if ( isset( $original['port'] ) ) $compare_original[] = $original['port']; if ( isset( $original['query'] ) ) $compare_original[] = $original['query']; $compare_redirect = array($redirect['host'], $redirect['path']); if ( isset( $redirect['port'] ) ) $compare_redirect[] = $redirect['port']; if ( isset( $redirect['query'] ) ) $compare_redirect[] = $redirect['query']; if ( $compare_original !== $compare_redirect ) { $redirect_url = $redirect['scheme'] . '://' . $redirect['host']; if ( isset($redirect['port']) ) $redirect_url .= ':' . $redirect['port']; $redirect_url .= $redirect['path']; if ( $redirect['query'] ) $redirect_url .= '?' . $redirect['query']; } if ( !$redirect_url || $redirect_url == $requested_url ) return false; // 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, $requested_url); if ( !$redirect_url || $redirect_url == $requested_url ) // yes, again -- in case the filter aborted the request return false; if ( $do_redirect ) { // protect against chained redirects if ( !redirect_canonical($redirect_url, false) ) { wp_redirect($redirect_url, 301); exit(); } else { return false; } } else { return $redirect_url; } } /** * Attempts to guess correct post based on query vars * * @since 2.3 * @uses $wpdb * * @return bool|string Returns False, if it can't find post, returns correct * location on success. */ function redirect_guess_404_permalink() { global $wpdb; if ( !get_query_var('name') ) return false; $where = $wpdb->prepare("post_name LIKE %s", get_query_var('name') . '%'); // if any of year, monthnum, or day are set, use them to refine the query if ( get_query_var('year') ) $where .= $wpdb->prepare(" AND YEAR(post_date) = %d", get_query_var('year')); if ( get_query_var('monthnum') ) $where .= $wpdb->prepare(" AND MONTH(post_date) = %d", get_query_var('monthnum')); if ( get_query_var('day') ) $where .= $wpdb->prepare(" AND DAYOFMONTH(post_date) = %d", get_query_var('day')); $post_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE $where AND post_status = 'publish'"); if ( !$post_id ) return false; return get_permalink($post_id); } add_action('template_redirect', 'redirect_canonical'); ?>