| 1 | <?php |
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| 2 | /** |
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| 3 | * Canonical API to handle WordPress Redirecting |
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| 4 | * |
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| 5 | * Based on "Permalink Redirect" from Scott Yang and "Enforce www. Preference" |
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| 6 | * by Mark Jaquith |
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| 7 | * |
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| 8 | * @package WordPress |
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| 9 | * @since 2.3.0 |
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| 10 | */ |
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| 11 | |
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| 12 | /** |
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| 13 | * Redirects incoming links to the proper URL based on the site url. |
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| 14 | * |
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| 15 | * Search engines consider www.somedomain.com and somedomain.com to be two |
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| 16 | * different URLs when they both go to the same location. This SEO enhancement |
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| 17 | * prevents penality for duplicate content by redirecting all incoming links to |
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| 18 | * one or the other. |
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| 19 | * |
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| 20 | * Prevents redirection for feeds, trackbacks, searches, comment popup, and |
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| 21 | * admin URLs. Does not redirect on IIS, page/post previews, and on form data. |
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| 22 | * |
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| 23 | * Will also attempt to find the correct link when a user enters a URL that does |
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| 24 | * not exist based on exact WordPress query. Will instead try to parse the URL |
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| 25 | * or query in an attempt to figure the correct page to go to. |
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| 26 | * |
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| 27 | * @since 2.3.0 |
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| 28 | * @uses $wp_rewrite |
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| 29 | * @uses $is_IIS |
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| 30 | * |
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| 31 | * @param string $requested_url Optional. The URL that was requested, used to |
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| 32 | * figure if redirect is needed. |
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| 33 | * @param bool $do_redirect Optional. Redirect to the new URL. |
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| 34 | * @return null|false|string Null, if redirect not needed. False, if redirect |
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| 35 | * not needed or the string of the URL |
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| 36 | */ |
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| 37 | function redirect_canonical( $requested_url = null, $do_redirect = true ) { |
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| 38 | global $wp_rewrite, $is_IIS, $wp_query, $wpdb; |
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| 39 | |
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| 40 | if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || !empty($_POST) || is_preview() || is_robots() || $is_IIS ) |
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| 41 | return; |
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| 42 | |
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| 43 | if ( !$requested_url ) { |
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| 44 | // build the URL in the address bar |
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| 45 | $requested_url = is_ssl() ? 'https://' : 'http://'; |
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| 46 | $requested_url .= $_SERVER['HTTP_HOST']; |
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| 47 | $requested_url .= $_SERVER['REQUEST_URI']; |
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| 48 | } |
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| 49 | |
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| 50 | $original = @parse_url($requested_url); |
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| 51 | if ( false === $original ) |
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| 52 | return; |
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| 53 | |
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| 54 | // Some PHP setups turn requests for / into /index.php in REQUEST_URI |
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| 55 | // See: http://trac.wordpress.org/ticket/5017 |
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| 56 | // See: http://trac.wordpress.org/ticket/7173 |
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| 57 | // Disabled, for now: |
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| 58 | // $original['path'] = preg_replace('|/index\.php$|', '/', $original['path']); |
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| 59 | |
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| 60 | $redirect = $original; |
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| 61 | $redirect_url = false; |
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| 62 | |
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| 63 | // Notice fixing |
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| 64 | if ( !isset($redirect['path']) ) |
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| 65 | $redirect['path'] = ''; |
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| 66 | if ( !isset($redirect['query']) ) |
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| 67 | $redirect['query'] = ''; |
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| 68 | |
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| 69 | $qv_remove = array(); |
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| 70 | |
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| 71 | if ( is_singular() && 1 > $wp_query->post_count && ($id = get_query_var('p')) ) { |
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| 72 | |
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| 73 | $vars = $wpdb->get_results( $wpdb->prepare("SELECT post_type, post_parent FROM $wpdb->posts WHERE ID = %d", $id) ); |
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| 74 | |
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| 75 | if ( isset($vars[0]) && $vars = $vars[0] ) { |
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| 76 | if ( 'revision' == $vars->post_type && $vars->post_parent > 0 ) |
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| 77 | $id = $vars->post_parent; |
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| 78 | |
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| 79 | if ( $redirect_url = get_permalink($id) ) |
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| 80 | $qv_remove = array_merge($qv_remove, array('p', 'page_id', 'attachment_id', 'post_type') ); |
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| 81 | } |
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| 82 | } elseif ( is_404() ) { |
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| 83 | // Redirect ?page_id, ?p=, ?attachment_id= to their respective url's |
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| 84 | $id = max( get_query_var('p'), get_query_var('page_id'), get_query_var('attachment_id') ); |
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| 85 | if ( $id && $redirect_post = get_post($id) ) { |
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| 86 | if ( get_post_type_object($redirect_post->post_type)->public ) { |
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| 87 | $redirect_url = get_permalink($redirect_post); |
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| 88 | $qv_remove = array_merge($qv_remove, array('p', 'page_id', 'attachment_id', 'post_type') ); |
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| 89 | } |
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| 90 | } |
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| 91 | |
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| 92 | if ( ! $redirect_url ) { |
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| 93 | $redirect_url = redirect_guess_404_permalink(); |
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| 94 | if ( $redirect_url ) |
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| 95 | $qv_remove = array_merge($qv_remove, array('pagename', 'name') ); |
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| 96 | } |
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| 97 | } elseif ( is_attachment() ) { |
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| 98 | if ( $redirect_url = get_attachment_link(get_query_var('attachment_id')) ) { |
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| 99 | $qv_remove[] = 'attachment_id'; |
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| 100 | $qv_remove[] = 'attachment'; |
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| 101 | } |
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| 102 | } elseif ( is_single() ) { |
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| 103 | if ( $redirect_url = get_permalink( $wp_query->get_queried_object_id() ) ) { |
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| 104 | $qv_remove[] = 'p'; |
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| 105 | $qv_remove[] = 'post_type'; |
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| 106 | $qv_remove[] = 'name'; |
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| 107 | $qv_remove[] = 'pagename'; |
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| 108 | } |
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| 109 | } elseif ( is_page() ) { |
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| 110 | if ( !is_feed() && isset($wp_query->queried_object) && 'page' == get_option('show_on_front') && $wp_query->queried_object->ID == get_option('page_on_front') && ! $redirect_url ) |
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| 111 | $redirect_url = home_url('/'); |
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| 112 | else |
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| 113 | $redirect_url = get_permalink(get_query_var('page_id')); |
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| 114 | if ( $redirect_url ) { |
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| 115 | $qv_remove[] = 'page_id'; |
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| 116 | $qv_remove[] = 'pagename'; |
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| 117 | } |
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| 118 | } elseif ( is_category() || is_tag() || is_tax() ) { // Terms (Tags/categories/Custom Taxonomies) |
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| 119 | |
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| 120 | // @TODO: Buggy, Doesnt account for the fact that categories include child cats in the count. |
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| 121 | $term_count = 0; |
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| 122 | $term_taxonomies = array_unique(wp_list_pluck($wp_query->tax_query->queries, 'taxonomy')); |
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| 123 | foreach ( $wp_query->tax_query->queries as $tax_query ) |
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| 124 | $term_count += count( $tax_query['terms'] ); |
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| 125 | |
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| 126 | $obj = $wp_query->get_queried_object(); |
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| 127 | if ( $term_count <= 1 && !empty($obj->term_id) ) |
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| 128 | $redirect_url = get_term_link((int)$obj->term_id, $obj->taxonomy); |
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| 129 | |
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| 130 | elseif ( $term_count > 1 && 1 == count($term_taxonomies) ) |
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| 131 | $redirect_url = false; // Booyakasha? Build the merged array and win the world? |
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| 132 | |
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| 133 | if ( $term_count == 1 ) { |
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| 134 | // Strip taxonomy query vars off the url. |
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| 135 | $qv_remove[] = 'term'; |
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| 136 | $qv_remove[] = 'taxonomy'; |
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| 137 | } |
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| 138 | |
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| 139 | if ( is_category() ) { |
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| 140 | $qv_remove[] = 'category_name'; |
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| 141 | $qv_remove[] = 'cat'; |
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| 142 | } elseif ( is_tag() ) { |
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| 143 | $qv_remove[] = 'tag'; |
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| 144 | $qv_remove[] = 'tag_id'; |
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| 145 | } else { // Custom taxonomies will have a custom query var, remove those too: |
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| 146 | $tax_obj = get_taxonomy( $obj->taxonomy ); |
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| 147 | if ( false !== $tax_obj->query_var ) |
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| 148 | $qv_remove[] = $tax_obj->query_var; |
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| 149 | } |
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| 150 | } elseif ( is_author() ) { |
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| 151 | $author = get_userdata( get_query_var('author') ); |
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| 152 | 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 ) ) ) { |
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| 153 | if ( $redirect_url = get_author_posts_url($author->ID, $author->user_nicename) ) { |
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| 154 | $qv_remove[] = 'author'; |
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| 155 | $qv_remove[] = 'author_name'; |
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| 156 | } |
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| 157 | } |
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| 158 | } elseif ( is_year() || is_month() || is_day() ) { |
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| 159 | if ( '' != get_query_var('m') ) { |
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| 160 | $m = get_query_var('m'); |
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| 161 | if ( strlen($m) > 6 ) |
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| 162 | $redirect_url = get_day_link(substr($m, 0, 4), substr($m, 4, 2), substr($m, 6, 2)); |
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| 163 | elseif ( strlen($m) > 4 ) |
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| 164 | $redirect_url = get_month_link( substr($m, 0, 4), substr($m, 4, 2) ); |
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| 165 | else |
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| 166 | $redirect_url = get_year_link($m); |
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| 167 | if ( $redirect_url ) |
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| 168 | $qv_remove[] = 'm'; |
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| 169 | } elseif ( is_day() ) { |
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| 170 | if ( get_query_var('year') && get_query_var('monthnum') ) |
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| 171 | $redirect_url = get_day_link(get_query_var('year'), get_query_var('monthnum'), get_query_var('day')); |
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| 172 | $qv_remove = array_merge($qv_remove, array('year', 'monthnum', 'day')); |
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| 173 | } elseif ( is_month() ) { |
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| 174 | if ( get_query_var('year') ) |
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| 175 | if ( $redirect_url = get_month_link(get_query_var('year'), get_query_var('monthnum')) ) |
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| 176 | $qv_remove = array_merge($qv_remove, array('year', 'monthnum')); |
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| 177 | } elseif ( is_year() ) { |
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| 178 | if ( $redirect_url = get_year_link(get_query_var('year')) ) |
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| 179 | $qv_remove[] = 'year'; |
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| 180 | } |
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| 181 | } elseif ( is_single() && strpos($wp_rewrite->permalink_structure, '%category%') !== false ) { |
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| 182 | $category = get_category_by_path(get_query_var('category_name')); |
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| 183 | $post_terms = wp_get_object_terms($wp_query->get_queried_object_id(), 'category', array('fields' => 'tt_ids')); |
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| 184 | if ( (!$category || is_wp_error($category)) || ( !is_wp_error($post_terms) && !empty($post_terms) && !in_array($category->term_taxonomy_id, $post_terms) ) ) |
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| 185 | $redirect_url = get_permalink($wp_query->get_queried_object_id()); |
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| 186 | } elseif ( is_singular() ) { |
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| 187 | $redirect_url = get_permalink( $wp_query->get_queried_object_id() ); |
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| 188 | } else { |
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| 189 | $redirect_url = home_url(); |
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| 190 | } |
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| 191 | |
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| 192 | if ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) { |
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| 193 | // Feeds |
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| 194 | if ( is_feed() ) { |
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| 195 | $feed = get_query_var('feed'); |
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| 196 | $redirect_url = trailingslashit( $redirect_url ); |
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| 197 | if ( is_comment_feed() ) { |
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| 198 | $feed = str_replace('comments-', '', $feed); |
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| 199 | $redirect_url .= 'comments/'; |
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| 200 | } |
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| 201 | $redirect_url .= 'feed'; |
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| 202 | if ( $feed != get_default_feed() ) |
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| 203 | $redirect_url .= '/' . $feed; |
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| 204 | $redirect_url = user_trailingslashit( $redirect_url, 'single_single' ); |
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| 205 | $qv_remove[] = 'feed'; |
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| 206 | } |
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| 207 | |
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| 208 | // Comment Paging |
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| 209 | if ( get_query_var('cpage') ) { |
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| 210 | if ( !is_feed() && get_query_var('cpage') > 0 ) |
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| 211 | $redirect_url = trailingslashit($redirect_url) . user_trailingslashit( 'comment-page-' . intval(get_query_var('cpage')), 'commentpaged' ); |
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| 212 | $qv_remove[] = 'cpage'; |
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| 213 | } |
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| 214 | |
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| 215 | // Post Paging |
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| 216 | if ( get_query_var('page') && ( is_singular() || (is_404() && $redirect_url) ) ) { |
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| 217 | $page = get_query_var('page'); |
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| 218 | if ( is_singular() ) { |
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| 219 | setup_postdata(get_queried_object()); |
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| 220 | global $numpages; |
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| 221 | $page = min($page, $numpages); |
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| 222 | } |
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| 223 | if ( !is_feed() ) // Feeds don't support paging |
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| 224 | $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( $page, 'single_paged' ); |
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| 225 | $qv_remove[] = 'page'; |
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| 226 | } |
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| 227 | |
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| 228 | // Archive Paging |
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| 229 | if ( get_query_var('paged') > 0 ) { |
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| 230 | if ( !is_feed() ) // Feeds don't support paging |
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| 231 | $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( "$wp_rewrite->pagination_base/" . get_query_var( 'paged' ), 'paged' ); |
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| 232 | $qv_remove[] = 'paged'; |
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| 233 | } |
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| 234 | |
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| 235 | if ( !empty($redirect_url) && ( is_singular() || is_404() ) ) { |
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| 236 | // Get the query vars in the current permastruct |
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| 237 | if ( preg_match_all('/(%.+?%)/', $wp_rewrite->permalink_structure, $tokens) ) { |
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| 238 | foreach ( $tokens[0] as $token ) |
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| 239 | $qv_remove[] = trim($wp_rewrite->queryreplace[ array_search($token, $wp_rewrite->rewritecode) ], '='); |
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| 240 | } |
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| 241 | } |
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| 242 | } |
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| 243 | |
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| 244 | /* |
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| 245 | // paging and feeds |
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| 246 | if ( get_query_var('paged') || is_feed() || get_query_var('cpage') ) { |
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| 247 | while ( preg_match( "#/$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'] ) ) { |
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| 248 | // Strip off paging and feed |
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| 249 | $redirect['path'] = preg_replace("#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", '/', $redirect['path']); // strip off any existing paging |
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| 250 | $redirect['path'] = preg_replace('#/(comments/?)?(feed|rss2?|rdf|atom)(/+|$)#', '/', $redirect['path']); // strip off feed endings |
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| 251 | $redirect['path'] = preg_replace('#/comment-page-[0-9]+?(/+)?$#', '/', $redirect['path']); // strip off any existing comment paging |
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| 252 | } |
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| 253 | |
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| 254 | $addl_path = ''; |
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| 255 | if ( is_feed() && in_array( get_query_var('feed'), $wp_rewrite->feeds ) ) { |
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| 256 | $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; |
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| 257 | if ( get_query_var( 'withcomments' ) ) |
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| 258 | $addl_path .= 'comments/'; |
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| 259 | if ( ( in_array( get_default_feed(), array( 'rss', 'rdf' ) ) && 'feed' == get_query_var('feed') ) || in_array( get_query_var('feed'), array( 'rss', 'rdf' ) ) ) |
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| 260 | $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == 'rss2' ) ? '' : 'rss2' ), 'feed' ); |
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| 261 | else |
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| 262 | $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == get_query_var('feed') || 'feed' == get_query_var('feed') ) ? '' : get_query_var('feed') ), 'feed' ); |
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| 263 | $redirect['query'] = remove_query_arg( 'feed', $redirect['query'] ); |
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| 264 | } elseif ( is_feed() && 'old' == get_query_var('feed') ) { |
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| 265 | $old_feed_files = array( |
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| 266 | 'wp-atom.php' => 'atom', |
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| 267 | 'wp-commentsrss2.php' => 'comments_rss2', |
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| 268 | 'wp-feed.php' => get_default_feed(), |
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| 269 | 'wp-rdf.php' => 'rss2', |
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| 270 | 'wp-rss.php' => 'rss2', |
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| 271 | 'wp-rss2.php' => 'rss2', |
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| 272 | ); |
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| 273 | if ( isset( $old_feed_files[ basename( $redirect['path'] ) ] ) ) { |
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| 274 | $redirect_url = get_feed_link( $old_feed_files[ basename( $redirect['path'] ) ] ); |
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| 275 | wp_redirect( $redirect_url, 301 ); |
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| 276 | die(); |
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| 277 | } |
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| 278 | } |
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| 279 | |
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| 280 | if ( get_query_var('paged') > 0 ) { |
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| 281 | $paged = get_query_var('paged'); |
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| 282 | $redirect['query'] = remove_query_arg( 'paged', $redirect['query'] ); |
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| 283 | if ( !is_feed() ) { |
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| 284 | if ( $paged > 1 && !is_single() ) { |
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| 285 | $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit("$wp_rewrite->pagination_base/$paged", 'paged'); |
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| 286 | } elseif ( !is_single() ) { |
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| 287 | $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; |
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| 288 | } |
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| 289 | } elseif ( $paged > 1 ) { |
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| 290 | $redirect['query'] = add_query_arg( 'paged', $paged, $redirect['query'] ); |
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| 291 | } |
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| 292 | } |
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| 293 | |
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| 294 | 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 ) ) ) { |
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| 295 | $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit( 'comment-page-' . get_query_var('cpage'), 'commentpaged' ); |
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| 296 | $redirect['query'] = remove_query_arg( 'cpage', $redirect['query'] ); |
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| 297 | } |
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| 298 | |
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| 299 | $redirect['path'] = user_trailingslashit( preg_replace('|/index.php/?$|', '/', $redirect['path']) ); // strip off trailing /index.php/ |
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| 300 | if ( !empty( $addl_path ) && $wp_rewrite->using_index_permalinks() && strpos($redirect['path'], '/index.php/') === false ) |
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| 301 | $redirect['path'] = trailingslashit($redirect['path']) . 'index.php/'; |
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| 302 | if ( !empty( $addl_path ) ) |
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| 303 | $redirect['path'] = trailingslashit($redirect['path']) . $addl_path; |
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| 304 | $redirect_url = $redirect['scheme'] . '://' . $redirect['host'] . $redirect['path']; |
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| 305 | } |
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| 306 | }*/ |
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| 307 | |
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| 308 | if ( empty($redirect_url) ) |
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| 309 | $redirect_url = $requested_url; |
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| 310 | |
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| 311 | $redirect = @parse_url($redirect_url); |
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| 312 | if ( empty($redirect['query']) ) |
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| 313 | $redirect['query'] = ''; |
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| 314 | |
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| 315 | // tack on any additional query vars |
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| 316 | $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); |
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| 317 | global $wp; |
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| 318 | |
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| 319 | $vars = array_merge($wp->query_vars, $_GET); |
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| 320 | $vars = array_filter($vars); //remove empty |
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| 321 | foreach ( $qv_remove as $qv ) |
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| 322 | unset($vars[ $qv ]); |
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| 323 | |
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| 324 | $redirect['query'] = add_query_arg($vars, $redirect['query']); |
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| 325 | |
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| 326 | // www.example.com vs example.com |
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| 327 | $user_home = @parse_url(home_url()); |
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| 328 | if ( !empty($user_home['host']) ) |
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| 329 | $redirect['host'] = $user_home['host']; |
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| 330 | if ( empty($user_home['path']) ) |
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| 331 | $user_home['path'] = '/'; |
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| 332 | |
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| 333 | // Handle ports |
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| 334 | if ( !empty($user_home['port']) ) |
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| 335 | $redirect['port'] = $user_home['port']; |
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| 336 | else |
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| 337 | unset($redirect['port']); |
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| 338 | |
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| 339 | // trailing /index.php |
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| 340 | $redirect['path'] = preg_replace('|/index.php/*?$|', '/', $redirect['path']); |
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| 341 | |
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| 342 | // Remove trailing spaces from the path |
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| 343 | $redirect['path'] = preg_replace( '#(%20| )+$#', '', $redirect['path'] ); |
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| 344 | |
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| 345 | if ( !empty( $redirect['query'] ) ) { |
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| 346 | // Remove trailing spaces from certain terminating query string args |
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| 347 | $redirect['query'] = preg_replace( '#((p|page_id|cat|tag)=[^&]*?)(%20| )+$#', '$1', $redirect['query'] ); |
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| 348 | |
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| 349 | // Clean up empty query strings |
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| 350 | $redirect['query'] = trim(preg_replace( '#(^|&)(p|page_id|cat|tag)=?(&|$)#', '&', $redirect['query']), '&'); |
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| 351 | |
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| 352 | // Redirect obsolete feeds |
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| 353 | $redirect['query'] = preg_replace( '#(^|&)feed=(rss|rdf)(&|$)#', '$1feed=rss2$3', $redirect['query'] ); |
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| 354 | |
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| 355 | // Remove redundant leading ampersands |
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| 356 | $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); |
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| 357 | |
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| 358 | // %2c => , |
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| 359 | $redirect['query'] = urldecode($redirect['query']); |
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| 360 | } |
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| 361 | |
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| 362 | // strip /index.php/ when we're not using PATHINFO permalinks |
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| 363 | if ( !$wp_rewrite->using_index_permalinks() ) |
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| 364 | $redirect['path'] = str_replace('/index.php/', '/', $redirect['path']); |
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| 365 | |
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| 366 | // trailing slashes |
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| 367 | if ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() && !is_404() && (!is_front_page() || ( is_front_page() && (get_query_var('paged') > 1) ) ) ) { |
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| 368 | $user_ts_type = ''; |
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| 369 | if ( get_query_var('paged') > 0 ) { |
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| 370 | $user_ts_type = 'paged'; |
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| 371 | } else { |
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| 372 | foreach ( array('single', 'category', 'page', 'day', 'month', 'year', 'home') as $type ) { |
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| 373 | $func = 'is_' . $type; |
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| 374 | if ( call_user_func($func) ) { |
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| 375 | $user_ts_type = $type; |
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| 376 | break; |
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| 377 | } |
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| 378 | } |
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| 379 | } |
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| 380 | $redirect['path'] = user_trailingslashit($redirect['path'], $user_ts_type); |
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| 381 | } elseif ( is_front_page() ) { |
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| 382 | $redirect['path'] = trailingslashit($redirect['path']); |
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| 383 | } |
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| 384 | |
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| 385 | // Strip multiple slashes out of the URL |
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| 386 | if ( strpos($redirect['path'], '//') > -1 ) |
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| 387 | $redirect['path'] = preg_replace('|/+|', '/', $redirect['path']); |
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| 388 | |
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| 389 | // Always trailing slash the Front Page URL |
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| 390 | if ( trailingslashit( $redirect['path'] ) == trailingslashit( $user_home['path'] ) ) |
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| 391 | $redirect['path'] = trailingslashit($redirect['path']); |
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| 392 | /* |
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| 393 | // Ignore differences in host capitalization, as this can lead to infinite redirects |
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| 394 | // Only redirect no-www <=> yes-www |
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| 395 | if ( strtolower($original['host']) == strtolower($redirect['host']) || |
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| 396 | ( strtolower($original['host']) != 'www.' . strtolower($redirect['host']) && 'www.' . strtolower($original['host']) != strtolower($redirect['host']) ) ) |
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| 397 | $redirect['host'] = $original['host']; |
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| 398 | |
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| 399 | $compare_original = array($original['host'], $original['path']); |
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| 400 | |
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| 401 | if ( !empty( $original['port'] ) ) |
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| 402 | $compare_original[] = $original['port']; |
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| 403 | |
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| 404 | if ( !empty( $original['query'] ) ) |
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| 405 | $compare_original[] = $original['query']; |
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| 406 | |
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| 407 | $compare_redirect = array($redirect['host'], $redirect['path']); |
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| 408 | |
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| 409 | if ( !empty( $redirect['port'] ) ) |
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| 410 | $compare_redirect[] = $redirect['port']; |
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| 411 | |
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| 412 | if ( !empty( $redirect['query'] ) ) |
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| 413 | $compare_redirect[] = $redirect['query']; |
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| 414 | */ |
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| 415 | // if ( $compare_original !== $compare_redirect ) { |
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| 416 | |
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| 417 | $redirect_url = $redirect['scheme'] . '://' . $redirect['host']; |
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| 418 | if ( !empty($redirect['port']) ) |
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| 419 | $redirect_url .= ':' . $redirect['port']; |
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| 420 | $redirect_url .= $redirect['path']; |
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| 421 | if ( !empty($redirect['query']) ) |
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| 422 | $redirect_url .= '?' . $redirect['query']; |
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| 423 | // } |
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| 424 | |
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| 425 | // if ( !$redirect_url || $redirect_url == $requested_url ) |
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| 426 | // return false; |
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| 427 | |
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| 428 | // Hex encoded octets are case-insensitive. |
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| 429 | if ( false !== strpos($requested_url, '%') ) { |
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| 430 | if ( !function_exists('lowercase_octets') ) { |
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| 431 | function lowercase_octets($matches) { |
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| 432 | return strtolower( $matches[0] ); |
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| 433 | } |
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| 434 | } |
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| 435 | $requested_url = preg_replace_callback('|%[a-fA-F0-9][a-fA-F0-9]|', 'lowercase_octets', $requested_url); |
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| 436 | } |
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| 437 | |
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| 438 | // Note that you can use the "redirect_canonical" filter to cancel a canonical redirect for whatever reason by returning FALSE |
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| 439 | $redirect_url = apply_filters('redirect_canonical', $redirect_url, $requested_url); |
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| 440 | |
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| 441 | if ( !$redirect_url || $redirect_url == $requested_url ) // yes, again -- in case the filter aborted the request |
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| 442 | return false; |
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| 443 | |
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| 444 | if ( $do_redirect ) { |
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| 445 | // protect against chained redirects |
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| 446 | if ( !redirect_canonical($redirect_url, false) ) { |
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| 447 | wp_redirect($redirect_url, 301); |
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| 448 | exit(); |
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| 449 | } else { |
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| 450 | // Debug |
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| 451 | // die("1: $redirect_url<br />2: " . redirect_canonical( $redirect_url, false ) ); |
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| 452 | return false; |
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| 453 | } |
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| 454 | } else { |
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| 455 | return $redirect_url; |
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| 456 | } |
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| 457 | } |
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| 458 | |
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| 459 | /** |
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| 460 | * Attempts to guess correct post based on query vars. |
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| 461 | * |
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| 462 | * @since 2.3.0 |
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| 463 | * @uses $wpdb |
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| 464 | * |
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| 465 | * @return bool|string Returns False, if it can't find post, returns correct |
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| 466 | * location on success. |
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| 467 | */ |
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| 468 | function redirect_guess_404_permalink() { |
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| 469 | global $wpdb; |
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| 470 | |
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| 471 | if ( !get_query_var('name') ) |
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| 472 | return false; |
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| 473 | |
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| 474 | $where = $wpdb->prepare("post_name LIKE %s", like_escape( get_query_var('name') ) . '%'); |
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| 475 | |
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| 476 | // if any of post_type, year, monthnum, or day are set, use them to refine the query |
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| 477 | if ( get_query_var('post_type') ) |
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| 478 | $where .= $wpdb->prepare(" AND post_type = %s", get_query_var('post_type')); |
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| 479 | if ( get_query_var('year') ) |
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| 480 | $where .= $wpdb->prepare(" AND YEAR(post_date) = %d", get_query_var('year')); |
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| 481 | if ( get_query_var('monthnum') ) |
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| 482 | $where .= $wpdb->prepare(" AND MONTH(post_date) = %d", get_query_var('monthnum')); |
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| 483 | if ( get_query_var('day') ) |
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| 484 | $where .= $wpdb->prepare(" AND DAYOFMONTH(post_date) = %d", get_query_var('day')); |
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| 485 | |
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| 486 | $post_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE $where AND post_status = 'publish'"); |
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| 487 | if ( !$post_id ) |
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| 488 | return false; |
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| 489 | return get_permalink($post_id); |
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| 490 | } |
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| 491 | |
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| 492 | add_action('template_redirect', 'redirect_canonical'); |
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| 493 | |
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| 494 | ?> |
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