/** * Redirects incoming links to the proper URL based on the site url. * * Search engines consider www.somedomain.com and somedomain.com to be two * different URLs when they both go to the same location. This SEO enhancement * prevents penalty for duplicate content by redirecting all incoming links to * one or the other. * * Prevents redirection for feeds, trackbacks, searches, comment popup, and * admin URLs. Does not redirect on non-pretty-permalink-supporting IIS 7+, * page/post previews, WP admin, Trackbacks, robots.txt, searches, or on POST * requests. * * Will also attempt to find the correct link when a user enters a URL that does * not exist based on exact WordPress query. Will instead try to parse the URL * or query in an attempt to figure the correct page to go to. * * @since 2.3.0 * * @global WP_Rewrite $wp_rewrite * @global bool $is_IIS * @global WP_Query $wp_query * @global wpdb $wpdb WordPress database abstraction object. * * @param string $requested_url Optional. The URL that was requested, used to * figure if redirect is needed. * @param bool $do_redirect Optional. Redirect to the new URL. * @return string|void The string of the URL, if redirect needed. */ function redirect_canonical($requested_url = null, $do_redirect = true) { global $wp_rewrite, $is_IIS, $wp_query, $wpdb, $wp; if (isset($_SERVER['REQUEST_METHOD']) && !in_array(strtoupper($_SERVER['REQUEST_METHOD']), array('GET', 'HEAD'))) { return; } // If we're not in wp-admin and the post has been published and preview nonce // is non-existent or invalid then no need for preview in query if (is_preview() && get_query_var('p') && 'publish' == get_post_status(get_query_var('p'))) { if (!isset($_GET['preview_id']) || !isset($_GET['preview_nonce']) || !wp_verify_nonce($_GET['preview_nonce'], 'post_preview_' . (int) $_GET['preview_id'])) { $wp_query->is_preview = false; } } if (is_trackback() || is_search() || is_comments_popup() || is_admin() || is_preview() || is_robots() || $is_IIS && !iis7_supports_permalinks()) { return; } if (!$requested_url && isset($_SERVER['HTTP_HOST'])) { // build the URL in the address bar $requested_url = is_ssl() ? 'https://' : 'http://'; $requested_url .= $_SERVER['HTTP_HOST']; $requested_url .= $_SERVER['REQUEST_URI']; } $original = @parse_url($requested_url); if (false === $original) { return; } $redirect = $original; $redirect_url = false; // Notice fixing if (!isset($redirect['path'])) { $redirect['path'] = ''; } if (!isset($redirect['query'])) { $redirect['query'] = ''; } // If the original URL ended with non-breaking spaces, they were almost // certainly inserted by accident. Let's remove them, so the reader doesn't // see a 404 error with no obvious cause. $redirect['path'] = preg_replace('|(%C2%A0)+$|i', '', $redirect['path']); // It's not a preview, so remove it from URL if (get_query_var('preview')) { $redirect['query'] = remove_query_arg('preview', $redirect['query']); } if (is_feed() && ($id = get_query_var('p'))) { if ($redirect_url = get_post_comments_feed_link($id, get_query_var('feed'))) { $redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type', 'feed'), $redirect_url); $redirect['path'] = parse_url($redirect_url, PHP_URL_PATH); } } if (is_singular() && 1 > $wp_query->post_count && ($id = get_query_var('p'))) { $vars = $wpdb->get_results($wpdb->prepare("SELECT post_type, post_parent FROM {$wpdb->posts} WHERE ID = %d", $id)); if (isset($vars[0]) && ($vars = $vars[0])) { if ('revision' == $vars->post_type && $vars->post_parent > 0) { $id = $vars->post_parent; } if ($redirect_url = get_permalink($id)) { $redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type'), $redirect_url); } } } // These tests give us a WP-generated permalink if (is_404()) { // 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); $redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type'), $redirect_url); } } if (get_query_var('day') && get_query_var('monthnum') && get_query_var('year')) { $year = get_query_var('year'); $month = get_query_var('monthnum'); $day = get_query_var('day'); $date = sprintf('%04d-%02d-%02d', $year, $month, $day); if (!wp_checkdate($month, $day, $year, $date)) { $redirect_url = get_month_link($year, $month); $redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('year', 'monthnum', 'day'), $redirect_url); } } elseif (get_query_var('monthnum') && get_query_var('year') && 12 < get_query_var('monthnum')) { $redirect_url = get_year_link(get_query_var('year')); $redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('year', 'monthnum'), $redirect_url); } if (!$redirect_url) { if ($redirect_url = redirect_guess_404_permalink()) { $redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('page', 'feed', 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type'), $redirect_url); } } if (get_query_var('page') && $wp_query->post && false !== strpos($wp_query->post->post_content, '<!--nextpage-->')) { $redirect['path'] = rtrim($redirect['path'], (int) get_query_var('page') . '/'); $redirect['query'] = remove_query_arg('page', $redirect['query']); $redirect_url = get_permalink($wp_query->post->ID); } } elseif (is_object($wp_rewrite) && $wp_rewrite->using_permalinks()) { // rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101 if (is_attachment() && !array_diff(array_keys($wp->query_vars), array('attachment', 'attachment_id')) && !$redirect_url) { if (!empty($_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 { $redirect_url = get_attachment_link(); } } elseif (is_single() && !empty($_GET['p']) && !$redirect_url) { if ($redirect_url = get_permalink(get_query_var('p'))) { $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)) { 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', $redirect['query']); } // now moving on to non ?m=X year/month/day links } elseif (is_day() && get_query_var('year') && get_query_var('monthnum') && !empty($_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'), $redirect['query']); } } elseif (is_month() && get_query_var('year') && !empty($_GET['monthnum'])) { if ($redirect_url = get_month_link(get_query_var('year'), get_query_var('monthnum'))) { $redirect['query'] = remove_query_arg(array('year', 'monthnum'), $redirect['query']); } } elseif (is_year() && !empty($_GET['year'])) { if ($redirect_url = get_year_link(get_query_var('year'))) { $redirect['query'] = remove_query_arg('year', $redirect['query']); } } elseif (is_author() && !empty($_GET['author']) && preg_match('|^[0-9]+$|', $_GET['author'])) { $author = get_userdata(get_query_var('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->queried_terms 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)) { if (!empty($redirect['query'])) { // Strip taxonomy query vars off the url. $qv_remove = array('term', 'taxonomy'); if (is_category()) { $qv_remove[] = 'category_name'; $qv_remove[] = 'cat'; } elseif (is_tag()) { $qv_remove[] = 'tag'; $qv_remove[] = 'tag_id'; } else { // Custom taxonomies will have a custom query var, remove those too: $tax_obj = get_taxonomy($obj->taxonomy); if (false !== $tax_obj->query_var) { $qv_remove[] = $tax_obj->query_var; } } $rewrite_vars = array_diff(array_keys($wp_query->query), array_keys($_GET)); if (!array_diff($rewrite_vars, array_keys($_GET))) { // Check to see if all the Query vars are coming from the rewrite, none are set via $_GET $redirect['query'] = remove_query_arg($qv_remove, $redirect['query']); //Remove all of the per-tax qv's // Create the destination url for this taxonomy $tax_url = parse_url($tax_url); if (!empty($tax_url['query'])) { // Taxonomy accessible via ?taxonomy=..&term=.. or any custom qv.. parse_str($tax_url['query'], $query_vars); $redirect['query'] = add_query_arg($query_vars, $redirect['query']); } else { // Taxonomy is accessible via a "pretty-URL" $redirect['path'] = $tax_url['path']; } } else { // Some query vars are set via $_GET. Unset those from $_GET that exist via the rewrite foreach ($qv_remove as $_qv) { if (isset($rewrite_vars[$_qv])) { $redirect['query'] = remove_query_arg($_qv, $redirect['query']); } } } } } } elseif (is_single() && strpos($wp_rewrite->permalink_structure, '%category%') !== false && ($cat = get_query_var('category_name'))) { $category = get_category_by_path($cat); $post_terms = wp_get_object_terms($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()); } } // Post Paging if (is_singular() && !is_front_page() && get_query_var('page')) { if (!$redirect_url) { $redirect_url = get_permalink(get_queried_object_id()); } $redirect_url = trailingslashit($redirect_url) . user_trailingslashit(get_query_var('page'), 'single_paged'); $redirect['query'] = remove_query_arg('page', $redirect['query']); } // paging and feeds if (get_query_var('paged') || is_feed() || get_query_var('cpage')) { while (preg_match("#/{$wp_rewrite->pagination_base}/?[0-9]+?(/+)?\$#", $redirect['path']) || preg_match('#/(comments/?)?(feed|rss|rdf|atom|rss2)(/+)?$#', $redirect['path']) || preg_match("#/{$wp_rewrite->comments_pagination_base}-[0-9]+(/+)?\$#", $redirect['path'])) { // Strip off paging and feed $redirect['path'] = preg_replace("#/{$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 $redirect['path'] = preg_replace("#/{$wp_rewrite->comments_pagination_base}-[0-9]+?(/+)?\$#", '/', $redirect['path']); // strip off any existing comment paging } $addl_path = ''; if (is_feed() && in_array(get_query_var('feed'), $wp_rewrite->feeds)) { $addl_path = !empty($addl_path) ? trailingslashit($addl_path) : ''; if (!is_singular() && get_query_var('withcomments')) { $addl_path .= 'comments/'; } if ('rss' == get_default_feed() && 'feed' == get_query_var('feed') || 'rss' == get_query_var('feed')) { $addl_path .= user_trailingslashit('feed/' . (get_default_feed() == 'rss2' ? '' : 'rss2'), 'feed'); } else { $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']); } elseif (is_feed() && 'old' == get_query_var('feed')) { $old_feed_files = array('wp-atom.php' => 'atom', 'wp-commentsrss2.php' => 'comments_rss2', 'wp-feed.php' => get_default_feed(), 'wp-rdf.php' => 'rdf', 'wp-rss.php' => 'rss2', 'wp-rss2.php' => 'rss2'); if (isset($old_feed_files[basename($redirect['path'])])) { $redirect_url = get_feed_link($old_feed_files[basename($redirect['path'])]); wp_redirect($redirect_url, 301); die; } } if (get_query_var('paged') > 0) { $paged = get_query_var('paged'); $redirect['query'] = remove_query_arg('paged', $redirect['query']); if (!is_feed()) { if ($paged > 1 && !is_single()) { $addl_path = (!empty($addl_path) ? trailingslashit($addl_path) : '') . user_trailingslashit("{$wp_rewrite->pagination_base}/{$paged}", 'paged'); } elseif (!is_single()) { $addl_path = !empty($addl_path) ? trailingslashit($addl_path) : ''; } } elseif ($paged > 1) { $redirect['query'] = add_query_arg('paged', $paged, $redirect['query']); } } if (get_option('page_comments') && ('newest' == get_option('default_comments_page') && get_query_var('cpage') > 0 || 'newest' != get_option('default_comments_page') && get_query_var('cpage') > 1)) { $addl_path = (!empty($addl_path) ? trailingslashit($addl_path) : '') . user_trailingslashit($wp_rewrite->comments_pagination_base . '-' . get_query_var('cpage'), 'commentpaged'); $redirect['query'] = remove_query_arg('cpage', $redirect['query']); } $redirect['path'] = user_trailingslashit(preg_replace('|/' . preg_quote($wp_rewrite->index, '|') . '/?$|', '/', $redirect['path'])); // strip off trailing /index.php/ if (!empty($addl_path) && $wp_rewrite->using_index_permalinks() && strpos($redirect['path'], '/' . $wp_rewrite->index . '/') === false) { $redirect['path'] = trailingslashit($redirect['path']) . $wp_rewrite->index . '/'; } if (!empty($addl_path)) { $redirect['path'] = trailingslashit($redirect['path']) . $addl_path; } $redirect_url = $redirect['scheme'] . '://' . $redirect['host'] . $redirect['path']; } if ('wp-register.php' == basename($redirect['path'])) { if (is_multisite()) { /** This filter is documented in wp-login.php */ $redirect_url = apply_filters('wp_signup_location', network_site_url('wp-signup.php')); } else { $redirect_url = wp_registration_url(); } wp_redirect($redirect_url, 301); die; } } // tack on any additional query vars $redirect['query'] = preg_replace('#^\\??&*?#', '', $redirect['query']); if ($redirect_url && !empty($redirect['query'])) { parse_str($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']); } } $_parsed_query = rawurlencode_deep($_parsed_query); $redirect_url = add_query_arg($_parsed_query, $redirect_url); } if ($redirect_url) { $redirect = @parse_url($redirect_url); } // www.example.com vs example.com $user_home = @parse_url(home_url()); if (!empty($user_home['host'])) { $redirect['host'] = $user_home['host']; } if (empty($user_home['path'])) { $user_home['path'] = '/'; } // Handle ports if (!empty($user_home['port'])) { $redirect['port'] = $user_home['port']; } else { unset($redirect['port']); } // trailing /index.php $redirect['path'] = preg_replace('|/' . preg_quote($wp_rewrite->index, '|') . '/*?$|', '/', $redirect['path']); // Remove trailing spaces from the path $redirect['path'] = preg_replace('#(%20| )+$#', '', $redirect['path']); if (!empty($redirect['query'])) { // Remove trailing spaces from certain terminating query string args $redirect['query'] = preg_replace('#((p|page_id|cat|tag)=[^&]*?)(%20| )+$#', '$1', $redirect['query']); // Clean up empty query strings $redirect['query'] = trim(preg_replace('#(^|&)(p|page_id|cat|tag)=?(&|$)#', '&', $redirect['query']), '&'); // Redirect obsolete feeds $redirect['query'] = preg_replace('#(^|&)feed=rss(&|$)#', '$1feed=rss2$2', $redirect['query']); // Remove redundant leading ampersands $redirect['query'] = preg_replace('#^\\??&*?#', '', $redirect['query']); } // strip /index.php/ when we're not using PATHINFO permalinks if (!$wp_rewrite->using_index_permalinks()) { $redirect['path'] = str_replace('/' . $wp_rewrite->index . '/', '/', $redirect['path']); } // trailing slashes if (is_object($wp_rewrite) && $wp_rewrite->using_permalinks() && !is_404() && (!is_front_page() || is_front_page() && 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', 'home') 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_front_page()) { $redirect['path'] = trailingslashit($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']); } // Ignore differences in host capitalization, as this can lead to infinite redirects // Only redirect no-www <=> yes-www if (strtolower($original['host']) == strtolower($redirect['host']) || strtolower($original['host']) != 'www.' . strtolower($redirect['host']) && 'www.' . strtolower($original['host']) != strtolower($redirect['host'])) { $redirect['host'] = $original['host']; } $compare_original = array($original['host'], $original['path']); if (!empty($original['port'])) { $compare_original[] = $original['port']; } if (!empty($original['query'])) { $compare_original[] = $original['query']; } $compare_redirect = array($redirect['host'], $redirect['path']); if (!empty($redirect['port'])) { $compare_redirect[] = $redirect['port']; } if (!empty($redirect['query'])) { $compare_redirect[] = $redirect['query']; } if ($compare_original !== $compare_redirect) { $redirect_url = $redirect['scheme'] . '://' . $redirect['host']; if (!empty($redirect['port'])) { $redirect_url .= ':' . $redirect['port']; } $redirect_url .= $redirect['path']; if (!empty($redirect['query'])) { $redirect_url .= '?' . $redirect['query']; } } if (!$redirect_url || $redirect_url == $requested_url) { return; } // Hex encoded octets are case-insensitive. if (false !== strpos($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); } /** * Filter the canonical redirect URL. * * Returning false to this filter will cancel the redirect. * * @since 2.3.0 * * @param string $redirect_url The redirect URL. * @param string $requested_url The requested URL. */ $redirect_url = apply_filters('redirect_canonical', $redirect_url, $requested_url); // yes, again -- in case the filter aborted the request if (!$redirect_url || $redirect_url == $requested_url) { return; } if ($do_redirect) { // protect against chained redirects if (!redirect_canonical($redirect_url, false)) { wp_redirect($redirect_url, 301); exit; } else { // Debug // die("1: $redirect_url<br />2: " . redirect_canonical( $redirect_url, false ) ); return; } } else { return $redirect_url; } }
/** * Redirects incoming links to the proper URL based on the site url. * * Search engines consider www.somedomain.com and somedomain.com to be two * different URLs when they both go to the same location. This SEO enhancement * prevents penalty for duplicate content by redirecting all incoming links to * one or the other. * * Prevents redirection for feeds, trackbacks, searches, comment popup, and * admin URLs. Does not redirect on IIS, page/post previews, and on form data. * * Will also attempt to find the correct link when a user enters a URL that does * not exist based on exact WordPress query. Will instead try to parse the URL * or query in an attempt to figure the correct page to go to. * * @since 2.3.0 * @uses $wp_rewrite * @uses $is_IIS * * @param string $requested_url Optional. The URL that was requested, used to * figure if redirect is needed. * @param bool $do_redirect Optional. Redirect to the new URL. * @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 ) { global $wp_rewrite, $is_IIS, $wp_query, $wpdb; if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || !empty($_POST) || is_preview() || is_robots() || $is_IIS ) return; if ( !$requested_url ) { // build the URL in the address bar $requested_url = is_ssl() ? 'https://' : 'http://'; $requested_url .= $_SERVER['HTTP_HOST']; $requested_url .= $_SERVER['REQUEST_URI']; } $original = @parse_url($requested_url); if ( false === $original ) return; // Some PHP setups turn requests for / into /index.php in REQUEST_URI // See: http://trac.wordpress.org/ticket/5017 // See: http://trac.wordpress.org/ticket/7173 // Disabled, for now: // $original['path'] = preg_replace('|/index\.php$|', '/', $original['path']); $redirect = $original; $redirect_url = false; // Notice fixing if ( !isset($redirect['path']) ) $redirect['path'] = ''; if ( !isset($redirect['query']) ) $redirect['query'] = ''; if ( is_feed() && ( $id = get_query_var( 'p' ) ) ) { if ( $redirect_url = get_post_comments_feed_link( $id, get_query_var( 'feed' ) ) ) { $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type', 'feed'), $redirect_url ); $redirect['path'] = parse_url( $redirect_url, PHP_URL_PATH ); } } if ( is_singular() && 1 > $wp_query->post_count && ($id = get_query_var('p')) ) { $vars = $wpdb->get_results( $wpdb->prepare("SELECT post_type, post_parent FROM $wpdb->posts WHERE ID = %d", $id) ); if ( isset($vars[0]) && $vars = $vars[0] ) { if ( 'revision' == $vars->post_type && $vars->post_parent > 0 ) $id = $vars->post_parent; if ( $redirect_url = get_permalink($id) ) $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); } } // These tests give us a WP-generated permalink if ( is_404() ) { // 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_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); } } if ( ! $redirect_url ) { if ( $redirect_url = redirect_guess_404_permalink( $requested_url ) ) { $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'page', 'feed', 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); } } } elseif ( is_object($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 ) { if ( $redirect_url = get_attachment_link(get_query_var('attachment_id')) ) $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(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) ) { 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', $redirect['query']); // now moving on to non ?m=X year/month/day links } elseif ( is_day() && get_query_var('year') && get_query_var('monthnum') && !empty($_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'), $redirect['query']); } elseif ( is_month() && get_query_var('year') && !empty($_GET['monthnum']) ) { if ( $redirect_url = get_month_link(get_query_var('year'), get_query_var('monthnum')) ) $redirect['query'] = remove_query_arg(array('year', 'monthnum'), $redirect['query']); } elseif ( is_year() && !empty($_GET['year']) ) { if ( $redirect_url = get_year_link(get_query_var('year')) ) $redirect['query'] = remove_query_arg('year', $redirect['query']); } elseif ( is_author() && !empty($_GET['author']) && preg_match( '|^[0-9]+$|', $_GET['author'] ) ) { $author = get_userdata(get_query_var('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) ) { if ( !empty($redirect['query']) ) { // Strip taxonomy query vars off the url. $qv_remove = array( 'term', 'taxonomy'); if ( is_category() ) { $qv_remove[] = 'category_name'; $qv_remove[] = 'cat'; } elseif ( is_tag() ) { $qv_remove[] = 'tag'; $qv_remove[] = 'tag_id'; } else { // Custom taxonomies will have a custom query var, remove those too: $tax_obj = get_taxonomy( $obj->taxonomy ); if ( false !== $tax_obj->query_var ) $qv_remove[] = $tax_obj->query_var; } $rewrite_vars = array_diff( array_keys($wp_query->query), array_keys($_GET) ); if ( !array_diff($rewrite_vars, array_keys($_GET)) ) { // Check to see if all the Query vars are coming from the rewrite, none are set via $_GET $redirect['query'] = remove_query_arg($qv_remove, $redirect['query']); //Remove all of the per-tax qv's // Create the destination url for this taxonomy $tax_url = parse_url($tax_url); if ( ! empty($tax_url['query']) ) { // Taxonomy accessible via ?taxonomy=..&term=.. or any custom qv.. parse_str($tax_url['query'], $query_vars); $redirect['query'] = add_query_arg($query_vars, $redirect['query']); } else { // Taxonomy is accessible via a "pretty-URL" $redirect['path'] = $tax_url['path']; } } else { // Some query vars are set via $_GET. Unset those from $_GET that exist via the rewrite foreach ( $qv_remove as $_qv ) { if ( isset($rewrite_vars[$_qv]) ) $redirect['query'] = remove_query_arg($_qv, $redirect['query']); } } } } } elseif ( is_single() && strpos($wp_rewrite->permalink_structure, '%category%') !== false && $cat = get_query_var( 'category_name' ) ) { $category = get_category_by_path( $cat ); $post_terms = wp_get_object_terms($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()); } // Post Paging if ( is_singular() && ! is_front_page() && get_query_var('page') ) { if ( !$redirect_url ) $redirect_url = get_permalink( get_queried_object_id() ); $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' ); $redirect['query'] = remove_query_arg( 'page', $redirect['query'] ); } // paging and feeds if ( get_query_var('paged') || is_feed() || get_query_var('cpage') ) { while ( preg_match( "#/$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 $redirect['path'] = preg_replace("#/$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() && in_array( get_query_var('feed'), $wp_rewrite->feeds ) ) { $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; if ( !is_singular() && get_query_var( 'withcomments' ) ) $addl_path .= 'comments/'; if ( ( 'rss' == get_default_feed() && 'feed' == get_query_var('feed') ) || 'rss' == get_query_var('feed') ) $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == 'rss2' ) ? '' : 'rss2' ), 'feed' ); else $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'] ); } elseif ( is_feed() && 'old' == get_query_var('feed') ) { $old_feed_files = array( 'wp-atom.php' => 'atom', 'wp-commentsrss2.php' => 'comments_rss2', 'wp-feed.php' => get_default_feed(), 'wp-rdf.php' => 'rdf', 'wp-rss.php' => 'rss2', 'wp-rss2.php' => 'rss2', ); if ( isset( $old_feed_files[ basename( $redirect['path'] ) ] ) ) { $redirect_url = get_feed_link( $old_feed_files[ basename( $redirect['path'] ) ] ); wp_redirect( $redirect_url, 301 ); die(); } } if ( get_query_var('paged') > 0 ) { $paged = get_query_var('paged'); $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("$wp_rewrite->pagination_base/$paged", 'paged'); } elseif ( !is_single() ) { $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; } } elseif ( $paged > 1 ) { $redirect['query'] = add_query_arg( 'paged', $paged, $redirect['query'] ); } } if ( get_option('page_comments') && ( ( 'newest' == get_option('default_comments_page') && get_query_var('cpage') > 0 ) || ( 'newest' != get_option('default_comments_page') && get_query_var('cpage') > 1 ) ) ) { $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit( 'comment-page-' . get_query_var('cpage'), 'commentpaged' ); $redirect['query'] = remove_query_arg( 'cpage', $redirect['query'] ); } $redirect['path'] = user_trailingslashit( preg_replace('|/index.php/?$|', '/', $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 ) ) $redirect['path'] = trailingslashit($redirect['path']) . $addl_path; $redirect_url = $redirect['scheme'] . '://' . $redirect['host'] . $redirect['path']; } if ( 'wp-register.php' == basename( $redirect['path'] ) ) { if ( is_multisite() ) $redirect_url = apply_filters( 'wp_signup_location', site_url( 'wp-signup.php' ) ); else $redirect_url = site_url( 'wp-login.php?action=register' ); wp_redirect( $redirect_url, 301 ); die(); } } // tack on any additional query vars $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); if ( $redirect_url && !empty($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'] ); } $_parsed_query = rawurlencode_deep( $_parsed_query ); $redirect_url = add_query_arg( $_parsed_query, $redirect_url ); } if ( $redirect_url ) $redirect = @parse_url($redirect_url); // www.example.com vs example.com $user_home = @parse_url(home_url()); if ( !empty($user_home['host']) ) $redirect['host'] = $user_home['host']; if ( empty($user_home['path']) ) $user_home['path'] = '/'; // Handle ports if ( !empty($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 ( !empty( $redirect['query'] ) ) { // Remove trailing spaces from certain terminating query string args $redirect['query'] = preg_replace( '#((p|page_id|cat|tag)=[^&]*?)(%20| )+$#', '$1', $redirect['query'] ); // Clean up empty query strings $redirect['query'] = trim(preg_replace( '#(^|&)(p|page_id|cat|tag)=?(&|$)#', '&', $redirect['query']), '&'); // Redirect obsolete feeds $redirect['query'] = preg_replace( '#(^|&)feed=rss(&|$)#', '$1feed=rss2$3', $redirect['query'] ); // Remove redundant leading ampersands $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); } // strip /index.php/ when we're not using PATHINFO permalinks if ( !$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_front_page() || ( is_front_page() && (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', 'home') 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_front_page() ) { $redirect['path'] = trailingslashit($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']); // Ignore differences in host capitalization, as this can lead to infinite redirects // Only redirect no-www <=> yes-www if ( strtolower($original['host']) == strtolower($redirect['host']) || ( strtolower($original['host']) != 'www.' . strtolower($redirect['host']) && 'www.' . strtolower($original['host']) != strtolower($redirect['host']) ) ) $redirect['host'] = $original['host']; $compare_original = array($original['host'], $original['path']); if ( !empty( $original['port'] ) ) $compare_original[] = $original['port']; if ( !empty( $original['query'] ) ) $compare_original[] = $original['query']; $compare_redirect = array($redirect['host'], $redirect['path']); if ( !empty( $redirect['port'] ) ) $compare_redirect[] = $redirect['port']; if ( !empty( $redirect['query'] ) ) $compare_redirect[] = $redirect['query']; if ( $compare_original !== $compare_redirect ) { $redirect_url = $redirect['scheme'] . '://' . $redirect['host']; if ( !empty($redirect['port']) ) $redirect_url .= ':' . $redirect['port']; $redirect_url .= $redirect['path']; if ( !empty($redirect['query']) ) $redirect_url .= '?' . $redirect['query']; } if ( !$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, $requested_url); if ( !$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 { // Debug // die("1: $redirect_url<br />2: " . redirect_canonical( $redirect_url, false ) ); return false; } } else { return $redirect_url; } }