| 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 penalty 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, and |
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| 21 | * admin URLs. Does not redirect on non-pretty-permalink-supporting IIS 7+, |
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| 22 | * page/post previews, WP admin, Trackbacks, robots.txt, searches, or on POST |
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| 23 | * requests. |
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| 24 | * |
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| 25 | * Will also attempt to find the correct link when a user enters a URL that does |
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| 26 | * not exist based on exact WordPress query. Will instead try to parse the URL |
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| 27 | * or query in an attempt to figure the correct page to go to. |
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| 28 | * |
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| 29 | * @since 2.3.0 |
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| 30 | * |
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| 31 | * @global WP_Rewrite $wp_rewrite |
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| 32 | * @global bool $is_IIS |
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| 33 | * @global WP_Query $wp_query |
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| 34 | * @global wpdb $wpdb WordPress database abstraction object. |
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| 35 | * @global WP $wp Current WordPress environment instance. |
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| 36 | * |
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| 37 | * @param string $requested_url Optional. The URL that was requested, used to |
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| 38 | * figure if redirect is needed. |
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| 39 | * @param bool $do_redirect Optional. Redirect to the new URL. |
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| 40 | * @return string|void The string of the URL, if redirect needed. |
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| 41 | */ |
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| 42 | function redirect_canonical( $requested_url = null, $do_redirect = true ) { |
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| 43 | global $wp_rewrite, $is_IIS, $wp_query, $wpdb, $wp; |
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| 44 | |
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| 45 | if ( isset( $_SERVER['REQUEST_METHOD'] ) && ! in_array( strtoupper( $_SERVER['REQUEST_METHOD'] ), array( 'GET', 'HEAD' ) ) ) { |
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| 46 | return; |
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| 47 | } |
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| 48 | |
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| 49 | // If we're not in wp-admin and the post has been published and preview nonce |
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| 50 | // is non-existent or invalid then no need for preview in query |
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| 51 | if ( is_preview() && get_query_var( 'p' ) && 'publish' == get_post_status( get_query_var( 'p' ) ) ) { |
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| 52 | if ( ! isset( $_GET['preview_id'] ) |
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| 53 | || ! isset( $_GET['preview_nonce'] ) |
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| 54 | || ! wp_verify_nonce( $_GET['preview_nonce'], 'post_preview_' . (int) $_GET['preview_id'] ) ) { |
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| 55 | $wp_query->is_preview = false; |
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| 56 | } |
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| 57 | } |
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| 58 | |
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| 59 | if ( is_trackback() || is_search() || is_admin() || is_preview() || is_robots() || ( $is_IIS && !iis7_supports_permalinks() ) ) { |
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| 60 | return; |
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| 61 | } |
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| 62 | |
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| 63 | if ( ! $requested_url && isset( $_SERVER['HTTP_HOST'] ) ) { |
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| 64 | // build the URL in the address bar |
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| 65 | $requested_url = is_ssl() ? 'https://' : 'http://'; |
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| 66 | $requested_url .= $_SERVER['HTTP_HOST']; |
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| 67 | $requested_url .= $_SERVER['REQUEST_URI']; |
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| 68 | } |
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| 69 | |
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| 70 | $original = @parse_url($requested_url); |
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| 71 | if ( false === $original ) { |
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| 72 | return; |
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| 73 | } |
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| 74 | |
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| 75 | $redirect = $original; |
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| 76 | $redirect_url = false; |
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| 77 | |
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| 78 | // Notice fixing |
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| 79 | if ( !isset($redirect['path']) ) |
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| 80 | $redirect['path'] = ''; |
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| 81 | if ( !isset($redirect['query']) ) |
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| 82 | $redirect['query'] = ''; |
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| 83 | |
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| 84 | // If the original URL ended with non-breaking spaces, they were almost |
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| 85 | // certainly inserted by accident. Let's remove them, so the reader doesn't |
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| 86 | // see a 404 error with no obvious cause. |
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| 87 | $redirect['path'] = preg_replace( '|(%C2%A0)+$|i', '', $redirect['path'] ); |
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| 88 | |
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| 89 | // It's not a preview, so remove it from URL |
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| 90 | if ( get_query_var( 'preview' ) ) { |
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| 91 | $redirect['query'] = remove_query_arg( 'preview', $redirect['query'] ); |
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| 92 | } |
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| 93 | |
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| 94 | if ( is_feed() && ( $id = get_query_var( 'p' ) ) ) { |
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| 95 | if ( $redirect_url = get_post_comments_feed_link( $id, get_query_var( 'feed' ) ) ) { |
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| 96 | $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type', 'feed'), $redirect_url ); |
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| 97 | $redirect['path'] = parse_url( $redirect_url, PHP_URL_PATH ); |
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| 98 | } |
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| 99 | } |
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| 100 | |
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| 101 | if ( is_singular() && 1 > $wp_query->post_count && ($id = get_query_var('p')) ) { |
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| 102 | |
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| 103 | $vars = $wpdb->get_results( $wpdb->prepare("SELECT post_type, post_parent FROM $wpdb->posts WHERE ID = %d", $id) ); |
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| 104 | |
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| 105 | if ( isset($vars[0]) && $vars = $vars[0] ) { |
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| 106 | if ( 'revision' == $vars->post_type && $vars->post_parent > 0 ) |
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| 107 | $id = $vars->post_parent; |
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| 108 | |
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| 109 | if ( $redirect_url = get_permalink($id) ) |
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| 110 | $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); |
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| 111 | } |
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| 112 | } |
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| 113 | |
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| 114 | // These tests give us a WP-generated permalink |
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| 115 | if ( is_404() ) { |
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| 116 | |
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| 117 | // Redirect ?page_id, ?p=, ?attachment_id= to their respective url's |
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| 118 | $id = max( get_query_var('p'), get_query_var('page_id'), get_query_var('attachment_id') ); |
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| 119 | if ( $id && $redirect_post = get_post($id) ) { |
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| 120 | $post_type_obj = get_post_type_object($redirect_post->post_type); |
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| 121 | if ( $post_type_obj->public && 'auto-draft' != $redirect_post->post_status ) { |
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| 122 | $redirect_url = get_permalink($redirect_post); |
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| 123 | $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); |
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| 124 | } |
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| 125 | } |
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| 126 | |
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| 127 | if ( get_query_var( 'day' ) && get_query_var( 'monthnum' ) && get_query_var( 'year' ) ) { |
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| 128 | $year = get_query_var( 'year' ); |
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| 129 | $month = get_query_var( 'monthnum' ); |
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| 130 | $day = get_query_var( 'day' ); |
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| 131 | $date = sprintf( '%04d-%02d-%02d', $year, $month, $day ); |
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| 132 | if ( ! wp_checkdate( $month, $day, $year, $date ) ) { |
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| 133 | $redirect_url = get_month_link( $year, $month ); |
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| 134 | $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'year', 'monthnum', 'day' ), $redirect_url ); |
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| 135 | } |
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| 136 | } elseif ( get_query_var( 'monthnum' ) && get_query_var( 'year' ) && 12 < get_query_var( 'monthnum' ) ) { |
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| 137 | $redirect_url = get_year_link( get_query_var( 'year' ) ); |
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| 138 | $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'year', 'monthnum' ), $redirect_url ); |
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| 139 | } |
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| 140 | |
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| 141 | if ( ! $redirect_url ) { |
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| 142 | if ( $redirect_url = redirect_guess_404_permalink() ) { |
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| 143 | $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 ); |
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| 144 | } |
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| 145 | } |
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| 146 | |
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| 147 | if ( get_query_var( 'page' ) && $wp_query->post && |
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| 148 | false !== strpos( $wp_query->post->post_content, '<!--nextpage-->' ) ) { |
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| 149 | $redirect['path'] = rtrim( $redirect['path'], (int) get_query_var( 'page' ) . '/' ); |
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| 150 | $redirect['query'] = remove_query_arg( 'page', $redirect['query'] ); |
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| 151 | $redirect_url = get_permalink( $wp_query->post->ID ); |
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| 152 | } |
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| 153 | |
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| 154 | } elseif ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) { |
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| 155 | // rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101 |
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| 156 | if ( is_attachment() && |
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| 157 | ! array_diff( array_keys( $wp->query_vars ), array( 'attachment', 'attachment_id' ) ) && |
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| 158 | ! $redirect_url ) { |
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| 159 | if ( ! empty( $_GET['attachment_id'] ) ) { |
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| 160 | $redirect_url = get_attachment_link( get_query_var( 'attachment_id' ) ); |
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| 161 | if ( $redirect_url ) { |
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| 162 | $redirect['query'] = remove_query_arg( 'attachment_id', $redirect['query'] ); |
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| 163 | } |
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| 164 | } else { |
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| 165 | $redirect_url = get_attachment_link(); |
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| 166 | } |
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| 167 | } elseif ( is_single() && !empty($_GET['p']) && ! $redirect_url ) { |
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| 168 | if ( $redirect_url = get_permalink(get_query_var('p')) ) |
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| 169 | $redirect['query'] = remove_query_arg(array('p', 'post_type'), $redirect['query']); |
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| 170 | } elseif ( is_single() && !empty($_GET['name']) && ! $redirect_url ) { |
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| 171 | if ( $redirect_url = get_permalink( $wp_query->get_queried_object_id() ) ) |
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| 172 | $redirect['query'] = remove_query_arg('name', $redirect['query']); |
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| 173 | } elseif ( is_page() && !empty($_GET['page_id']) && ! $redirect_url ) { |
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| 174 | if ( $redirect_url = get_permalink(get_query_var('page_id')) ) |
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| 175 | $redirect['query'] = remove_query_arg('page_id', $redirect['query']); |
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| 176 | } elseif ( is_page() && !is_feed() && 'page' == get_option('show_on_front') && get_queried_object_id() == get_option('page_on_front') && ! $redirect_url ) { |
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| 177 | $redirect_url = home_url('/'); |
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| 178 | } elseif ( is_home() && !empty($_GET['page_id']) && 'page' == get_option('show_on_front') && get_query_var('page_id') == get_option('page_for_posts') && ! $redirect_url ) { |
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| 179 | if ( $redirect_url = get_permalink(get_option('page_for_posts')) ) |
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| 180 | $redirect['query'] = remove_query_arg('page_id', $redirect['query']); |
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| 181 | } elseif ( !empty($_GET['m']) && ( is_year() || is_month() || is_day() ) ) { |
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| 182 | $m = get_query_var('m'); |
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| 183 | switch ( strlen($m) ) { |
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| 184 | case 4: // Yearly |
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| 185 | $redirect_url = get_year_link($m); |
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| 186 | break; |
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| 187 | case 6: // Monthly |
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| 188 | $redirect_url = get_month_link( substr($m, 0, 4), substr($m, 4, 2) ); |
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| 189 | break; |
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| 190 | case 8: // Daily |
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| 191 | $redirect_url = get_day_link(substr($m, 0, 4), substr($m, 4, 2), substr($m, 6, 2)); |
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| 192 | break; |
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| 193 | } |
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| 194 | if ( $redirect_url ) |
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| 195 | $redirect['query'] = remove_query_arg('m', $redirect['query']); |
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| 196 | // now moving on to non ?m=X year/month/day links |
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| 197 | } elseif ( is_day() && get_query_var('year') && get_query_var('monthnum') && !empty($_GET['day']) ) { |
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| 198 | if ( $redirect_url = get_day_link(get_query_var('year'), get_query_var('monthnum'), get_query_var('day')) ) |
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| 199 | $redirect['query'] = remove_query_arg(array('year', 'monthnum', 'day'), $redirect['query']); |
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| 200 | } elseif ( is_month() && get_query_var('year') && !empty($_GET['monthnum']) ) { |
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| 201 | if ( $redirect_url = get_month_link(get_query_var('year'), get_query_var('monthnum')) ) |
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| 202 | $redirect['query'] = remove_query_arg(array('year', 'monthnum'), $redirect['query']); |
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| 203 | } elseif ( is_year() && !empty($_GET['year']) ) { |
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| 204 | if ( $redirect_url = get_year_link(get_query_var('year')) ) |
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| 205 | $redirect['query'] = remove_query_arg('year', $redirect['query']); |
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| 206 | } elseif ( is_author() && !empty($_GET['author']) && preg_match( '|^[0-9]+$|', $_GET['author'] ) ) { |
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| 207 | $author = get_userdata(get_query_var('author')); |
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| 208 | 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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| 209 | if ( $redirect_url = get_author_posts_url($author->ID, $author->user_nicename) ) |
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| 210 | $redirect['query'] = remove_query_arg('author', $redirect['query']); |
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| 211 | } |
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| 212 | } elseif ( is_category() || is_tag() || is_tax() ) { // Terms (Tags/categories) |
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| 213 | |
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| 214 | $term_count = 0; |
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| 215 | foreach ( $wp_query->tax_query->queried_terms as $tax_query ) |
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| 216 | $term_count += count( $tax_query['terms'] ); |
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| 217 | |
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| 218 | $obj = $wp_query->get_queried_object(); |
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| 219 | if ( $term_count <= 1 && !empty($obj->term_id) && ( $tax_url = get_term_link((int)$obj->term_id, $obj->taxonomy) ) && !is_wp_error($tax_url) ) { |
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| 220 | if ( !empty($redirect['query']) ) { |
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| 221 | // Strip taxonomy query vars off the url. |
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| 222 | $qv_remove = array( 'term', 'taxonomy'); |
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| 223 | if ( is_category() ) { |
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| 224 | $qv_remove[] = 'category_name'; |
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| 225 | $qv_remove[] = 'cat'; |
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| 226 | } elseif ( is_tag() ) { |
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| 227 | $qv_remove[] = 'tag'; |
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| 228 | $qv_remove[] = 'tag_id'; |
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| 229 | } else { // Custom taxonomies will have a custom query var, remove those too: |
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| 230 | $tax_obj = get_taxonomy( $obj->taxonomy ); |
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| 231 | if ( false !== $tax_obj->query_var ) |
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| 232 | $qv_remove[] = $tax_obj->query_var; |
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| 233 | } |
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| 234 | |
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| 235 | $rewrite_vars = array_diff( array_keys($wp_query->query), array_keys($_GET) ); |
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| 236 | |
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| 237 | if ( !array_diff($rewrite_vars, array_keys($_GET)) ) { // Check to see if all the Query vars are coming from the rewrite, none are set via $_GET |
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| 238 | $redirect['query'] = remove_query_arg($qv_remove, $redirect['query']); //Remove all of the per-tax qv's |
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| 239 | |
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| 240 | // Create the destination url for this taxonomy |
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| 241 | $tax_url = parse_url($tax_url); |
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| 242 | if ( ! empty($tax_url['query']) ) { // Taxonomy accessible via ?taxonomy=..&term=.. or any custom qv.. |
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| 243 | parse_str($tax_url['query'], $query_vars); |
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| 244 | $redirect['query'] = add_query_arg($query_vars, $redirect['query']); |
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| 245 | } else { // Taxonomy is accessible via a "pretty-URL" |
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| 246 | $redirect['path'] = $tax_url['path']; |
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| 247 | } |
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| 248 | |
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| 249 | } else { // Some query vars are set via $_GET. Unset those from $_GET that exist via the rewrite |
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| 250 | foreach ( $qv_remove as $_qv ) { |
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| 251 | if ( isset($rewrite_vars[$_qv]) ) |
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| 252 | $redirect['query'] = remove_query_arg($_qv, $redirect['query']); |
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| 253 | } |
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| 254 | } |
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| 255 | } |
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| 256 | |
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| 257 | } |
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| 258 | } elseif ( is_single() && strpos($wp_rewrite->permalink_structure, '%category%') !== false && $cat = get_query_var( 'category_name' ) ) { |
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| 259 | $category = get_category_by_path( $cat ); |
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| 260 | if ( ( ! $category || is_wp_error( $category ) ) || ! has_term( $category->term_id, 'category', $wp_query->get_queried_object_id() ) ) { |
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| 261 | $redirect_url = get_permalink($wp_query->get_queried_object_id()); |
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| 262 | } |
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| 263 | } |
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| 264 | |
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| 265 | // Post Paging |
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| 266 | if ( is_singular() && get_query_var('page') ) { |
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| 267 | if ( !$redirect_url ) |
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| 268 | $redirect_url = get_permalink( get_queried_object_id() ); |
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| 269 | |
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| 270 | $page = get_query_var( 'page' ); |
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| 271 | if ( $page > 1 ) { |
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| 272 | if ( is_front_page() ) { |
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| 273 | $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( "$wp_rewrite->pagination_base/$page", 'paged' ); |
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| 274 | } else { |
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| 275 | $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( $page, 'single_paged' ); |
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| 276 | } |
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| 277 | } |
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| 278 | $redirect['query'] = remove_query_arg( 'page', $redirect['query'] ); |
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| 279 | } |
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| 280 | |
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| 281 | // paging and feeds |
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| 282 | if ( get_query_var('paged') || is_feed() || get_query_var('cpage') ) { |
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| 283 | $feeds = array(); |
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| 284 | foreach ($wp_rewrite->feeds as $feed) { |
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| 285 | $feeds[] = preg_quote($feed, '#'); |
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| 286 | } |
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| 287 | $feeds = implode('|', $feeds); |
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| 288 | while ( preg_match( "#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", $redirect['path'] ) || preg_match( '#/(comments/?)?(' . $feeds . ')(/+)?$#', $redirect['path'] ) || preg_match( "#/{$wp_rewrite->comments_pagination_base}-[0-9]+(/+)?$#", $redirect['path'] ) ) { |
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| 289 | // Strip off paging and feed |
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| 290 | $redirect['path'] = preg_replace("#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", '/', $redirect['path']); // strip off any existing paging |
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| 291 | $redirect['path'] = preg_replace('#/(comments/?)?(' . $feeds . ')(/+|$)#', '/', $redirect['path']); // strip off feed endings |
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| 292 | $redirect['path'] = preg_replace("#/{$wp_rewrite->comments_pagination_base}-[0-9]+?(/+)?$#", '/', $redirect['path']); // strip off any existing comment paging |
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| 293 | } |
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| 294 | |
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| 295 | $addl_path = ''; |
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| 296 | if ( is_feed() && in_array( get_query_var('feed'), $wp_rewrite->feeds ) ) { |
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| 297 | $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; |
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| 298 | if ( !is_singular() && get_query_var( 'withcomments' ) ) |
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| 299 | $addl_path .= 'comments/'; |
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| 300 | if ( ( 'rss' == get_default_feed() && 'feed' == get_query_var('feed') ) || 'rss' == get_query_var('feed') ) |
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| 301 | $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == 'rss2' ) ? '' : 'rss2' ), 'feed' ); |
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| 302 | else |
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| 303 | $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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| 304 | $redirect['query'] = remove_query_arg( 'feed', $redirect['query'] ); |
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| 305 | } elseif ( is_feed() && 'old' == get_query_var('feed') ) { |
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| 306 | $old_feed_files = array( |
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| 307 | 'wp-atom.php' => 'atom', |
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| 308 | 'wp-commentsrss2.php' => 'comments_rss2', |
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| 309 | 'wp-feed.php' => get_default_feed(), |
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| 310 | 'wp-rdf.php' => 'rdf', |
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| 311 | 'wp-rss.php' => 'rss2', |
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| 312 | 'wp-rss2.php' => 'rss2', |
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| 313 | ); |
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| 314 | if ( isset( $old_feed_files[ basename( $redirect['path'] ) ] ) ) { |
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| 315 | $redirect_url = get_feed_link( $old_feed_files[ basename( $redirect['path'] ) ] ); |
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| 316 | wp_redirect( $redirect_url, 301 ); |
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| 317 | die(); |
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| 318 | } |
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| 319 | } |
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| 320 | |
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| 321 | if ( get_query_var('paged') > 0 ) { |
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| 322 | $paged = get_query_var('paged'); |
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| 323 | $redirect['query'] = remove_query_arg( 'paged', $redirect['query'] ); |
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| 324 | if ( !is_feed() ) { |
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| 325 | if ( $paged > 1 && !is_single() ) { |
|---|
| 326 | $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit("$wp_rewrite->pagination_base/$paged", 'paged'); |
|---|
| 327 | } elseif ( !is_single() ) { |
|---|
| 328 | $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; |
|---|
| 329 | } |
|---|
| 330 | } elseif ( $paged > 1 ) { |
|---|
| 331 | $redirect['query'] = add_query_arg( 'paged', $paged, $redirect['query'] ); |
|---|
| 332 | } |
|---|
| 333 | } |
|---|
| 334 | |
|---|
| 335 | if ( get_option( 'page_comments' ) && ( |
|---|
| 336 | ( 'newest' == get_option( 'default_comments_page' ) && get_query_var( 'cpage' ) > 0 ) || |
|---|
| 337 | ( 'newest' != get_option( 'default_comments_page' ) && get_query_var( 'cpage' ) > 1 ) |
|---|
| 338 | ) ) { |
|---|
| 339 | $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit( $wp_rewrite->comments_pagination_base . '-' . get_query_var('cpage'), 'commentpaged' ); |
|---|
| 340 | $redirect['query'] = remove_query_arg( 'cpage', $redirect['query'] ); |
|---|
| 341 | } |
|---|
| 342 | |
|---|
| 343 | $redirect['path'] = user_trailingslashit( preg_replace('|/' . preg_quote( $wp_rewrite->index, '|' ) . '/?$|', '/', $redirect['path']) ); // strip off trailing /index.php/ |
|---|
| 344 | if ( !empty( $addl_path ) && $wp_rewrite->using_index_permalinks() && strpos($redirect['path'], '/' . $wp_rewrite->index . '/') === false ) |
|---|
| 345 | $redirect['path'] = trailingslashit($redirect['path']) . $wp_rewrite->index . '/'; |
|---|
| 346 | if ( !empty( $addl_path ) ) |
|---|
| 347 | $redirect['path'] = trailingslashit($redirect['path']) . $addl_path; |
|---|
| 348 | $redirect_url = $redirect['scheme'] . '://' . $redirect['host'] . $redirect['path']; |
|---|
| 349 | } |
|---|
| 350 | |
|---|
| 351 | if ( 'wp-register.php' == basename( $redirect['path'] ) ) { |
|---|
| 352 | if ( is_multisite() ) { |
|---|
| 353 | /** This filter is documented in wp-login.php */ |
|---|
| 354 | $redirect_url = apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) ); |
|---|
| 355 | } else { |
|---|
| 356 | $redirect_url = wp_registration_url(); |
|---|
| 357 | } |
|---|
| 358 | |
|---|
| 359 | wp_redirect( $redirect_url, 301 ); |
|---|
| 360 | die(); |
|---|
| 361 | } |
|---|
| 362 | } |
|---|
| 363 | |
|---|
| 364 | // tack on any additional query vars |
|---|
| 365 | $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); |
|---|
| 366 | if ( $redirect_url && !empty($redirect['query']) ) { |
|---|
| 367 | parse_str( $redirect['query'], $_parsed_query ); |
|---|
| 368 | $redirect = @parse_url($redirect_url); |
|---|
| 369 | |
|---|
| 370 | if ( ! empty( $_parsed_query['name'] ) && ! empty( $redirect['query'] ) ) { |
|---|
| 371 | parse_str( $redirect['query'], $_parsed_redirect_query ); |
|---|
| 372 | |
|---|
| 373 | if ( empty( $_parsed_redirect_query['name'] ) ) |
|---|
| 374 | unset( $_parsed_query['name'] ); |
|---|
| 375 | } |
|---|
| 376 | |
|---|
| 377 | $_parsed_query = rawurlencode_deep( $_parsed_query ); |
|---|
| 378 | $redirect_url = add_query_arg( $_parsed_query, $redirect_url ); |
|---|
| 379 | } |
|---|
| 380 | |
|---|
| 381 | if ( $redirect_url ) |
|---|
| 382 | $redirect = @parse_url($redirect_url); |
|---|
| 383 | |
|---|
| 384 | // www.example.com vs example.com |
|---|
| 385 | $user_home = @parse_url(home_url()); |
|---|
| 386 | if ( !empty($user_home['host']) ) |
|---|
| 387 | $redirect['host'] = $user_home['host']; |
|---|
| 388 | if ( empty($user_home['path']) ) |
|---|
| 389 | $user_home['path'] = '/'; |
|---|
| 390 | |
|---|
| 391 | // Handle ports |
|---|
| 392 | if ( !empty($user_home['port']) ) |
|---|
| 393 | $redirect['port'] = $user_home['port']; |
|---|
| 394 | else |
|---|
| 395 | unset($redirect['port']); |
|---|
| 396 | |
|---|
| 397 | // trailing /index.php |
|---|
| 398 | $redirect['path'] = preg_replace('|/' . preg_quote( $wp_rewrite->index, '|' ) . '/*?$|', '/', $redirect['path']); |
|---|
| 399 | |
|---|
| 400 | $punctuation_pattern = implode( '|', array_map( 'preg_quote', array( |
|---|
| 401 | ' ', '%20', // space |
|---|
| 402 | '!', '%21', // exclamation mark |
|---|
| 403 | '"', '%22', // double quote |
|---|
| 404 | "'", '%27', // single quote |
|---|
| 405 | '(', '%28', // opening bracket |
|---|
| 406 | ')', '%29', // closing bracket |
|---|
| 407 | ',', '%2C', // comma |
|---|
| 408 | '.', '%2E', // period |
|---|
| 409 | ';', '%3B', // semicolon |
|---|
| 410 | '{', '%7B', // opening curly bracket |
|---|
| 411 | '}', '%7D', // closing curly bracket |
|---|
| 412 | '%E2%80%9C', // opening curly quote |
|---|
| 413 | '%E2%80%9D', // closing curly quote |
|---|
| 414 | ) ) ); |
|---|
| 415 | |
|---|
| 416 | // Remove trailing spaces and end punctuation from the path. |
|---|
| 417 | $redirect['path'] = preg_replace( "#($punctuation_pattern)+$#", '', $redirect['path'] ); |
|---|
| 418 | |
|---|
| 419 | if ( !empty( $redirect['query'] ) ) { |
|---|
| 420 | // Remove trailing spaces and end punctuation from certain terminating query string args. |
|---|
| 421 | $redirect['query'] = preg_replace( "#((p|page_id|cat|tag)=[^&]*?)($punctuation_pattern)+$#", '$1', $redirect['query'] ); |
|---|
| 422 | |
|---|
| 423 | // Clean up empty query strings |
|---|
| 424 | $redirect['query'] = trim(preg_replace( '#(^|&)(p|page_id|cat|tag)=?(&|$)#', '&', $redirect['query']), '&'); |
|---|
| 425 | |
|---|
| 426 | // Redirect obsolete feeds |
|---|
| 427 | $redirect['query'] = preg_replace( '#(^|&)feed=rss(&|$)#', '$1feed=rss2$2', $redirect['query'] ); |
|---|
| 428 | |
|---|
| 429 | // Remove redundant leading ampersands |
|---|
| 430 | $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); |
|---|
| 431 | } |
|---|
| 432 | |
|---|
| 433 | // strip /index.php/ when we're not using PATHINFO permalinks |
|---|
| 434 | if ( !$wp_rewrite->using_index_permalinks() ) |
|---|
| 435 | $redirect['path'] = str_replace( '/' . $wp_rewrite->index . '/', '/', $redirect['path'] ); |
|---|
| 436 | |
|---|
| 437 | // trailing slashes |
|---|
| 438 | if ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() && !is_404() && (!is_front_page() || ( is_front_page() && (get_query_var('paged') > 1) ) ) ) { |
|---|
| 439 | $user_ts_type = ''; |
|---|
| 440 | if ( get_query_var('paged') > 0 ) { |
|---|
| 441 | $user_ts_type = 'paged'; |
|---|
| 442 | } else { |
|---|
| 443 | foreach ( array('single', 'category', 'page', 'day', 'month', 'year', 'home') as $type ) { |
|---|
| 444 | $func = 'is_' . $type; |
|---|
| 445 | if ( call_user_func($func) ) { |
|---|
| 446 | $user_ts_type = $type; |
|---|
| 447 | break; |
|---|
| 448 | } |
|---|
| 449 | } |
|---|
| 450 | } |
|---|
| 451 | $redirect['path'] = user_trailingslashit($redirect['path'], $user_ts_type); |
|---|
| 452 | } elseif ( is_front_page() ) { |
|---|
| 453 | $redirect['path'] = trailingslashit($redirect['path']); |
|---|
| 454 | } |
|---|
| 455 | |
|---|
| 456 | // Strip multiple slashes out of the URL |
|---|
| 457 | if ( strpos($redirect['path'], '//') > -1 ) |
|---|
| 458 | $redirect['path'] = preg_replace('|/+|', '/', $redirect['path']); |
|---|
| 459 | |
|---|
| 460 | // Always trailing slash the Front Page URL |
|---|
| 461 | if ( trailingslashit( $redirect['path'] ) == trailingslashit( $user_home['path'] ) ) |
|---|
| 462 | $redirect['path'] = trailingslashit($redirect['path']); |
|---|
| 463 | |
|---|
| 464 | // Ignore differences in host capitalization, as this can lead to infinite redirects |
|---|
| 465 | // Only redirect no-www <=> yes-www |
|---|
| 466 | if ( strtolower($original['host']) == strtolower($redirect['host']) || |
|---|
| 467 | ( strtolower($original['host']) != 'www.' . strtolower($redirect['host']) && 'www.' . strtolower($original['host']) != strtolower($redirect['host']) ) ) |
|---|
| 468 | $redirect['host'] = $original['host']; |
|---|
| 469 | |
|---|
| 470 | $compare_original = array( $original['host'], $original['path'] ); |
|---|
| 471 | |
|---|
| 472 | if ( !empty( $original['port'] ) ) |
|---|
| 473 | $compare_original[] = $original['port']; |
|---|
| 474 | |
|---|
| 475 | if ( !empty( $original['query'] ) ) |
|---|
| 476 | $compare_original[] = $original['query']; |
|---|
| 477 | |
|---|
| 478 | $compare_redirect = array( $redirect['host'], $redirect['path'] ); |
|---|
| 479 | |
|---|
| 480 | if ( !empty( $redirect['port'] ) ) |
|---|
| 481 | $compare_redirect[] = $redirect['port']; |
|---|
| 482 | |
|---|
| 483 | if ( !empty( $redirect['query'] ) ) |
|---|
| 484 | $compare_redirect[] = $redirect['query']; |
|---|
| 485 | |
|---|
| 486 | if ( $compare_original !== $compare_redirect ) { |
|---|
| 487 | $redirect_url = $redirect['scheme'] . '://' . $redirect['host']; |
|---|
| 488 | if ( !empty($redirect['port']) ) |
|---|
| 489 | $redirect_url .= ':' . $redirect['port']; |
|---|
| 490 | $redirect_url .= $redirect['path']; |
|---|
| 491 | if ( !empty($redirect['query']) ) |
|---|
| 492 | $redirect_url .= '?' . $redirect['query']; |
|---|
| 493 | } |
|---|
| 494 | |
|---|
| 495 | if ( ! $redirect_url || $redirect_url == $requested_url ) { |
|---|
| 496 | return; |
|---|
| 497 | } |
|---|
| 498 | |
|---|
| 499 | // Hex encoded octets are case-insensitive. |
|---|
| 500 | if ( false !== strpos($requested_url, '%') ) { |
|---|
| 501 | if ( !function_exists('lowercase_octets') ) { |
|---|
| 502 | /** |
|---|
| 503 | * Converts the first hex-encoded octet match to lowercase. |
|---|
| 504 | * |
|---|
| 505 | * @since 3.1.0 |
|---|
| 506 | * @ignore |
|---|
| 507 | * |
|---|
| 508 | * @param array $matches Hex-encoded octet matches for the requested URL. |
|---|
| 509 | * @return string Lowercased version of the first match. |
|---|
| 510 | */ |
|---|
| 511 | function lowercase_octets($matches) { |
|---|
| 512 | return strtolower( $matches[0] ); |
|---|
| 513 | } |
|---|
| 514 | } |
|---|
| 515 | $requested_url = preg_replace_callback('|%[a-fA-F0-9][a-fA-F0-9]|', 'lowercase_octets', $requested_url); |
|---|
| 516 | } |
|---|
| 517 | |
|---|
| 518 | /** |
|---|
| 519 | * Filters the canonical redirect URL. |
|---|
| 520 | * |
|---|
| 521 | * Returning false to this filter will cancel the redirect. |
|---|
| 522 | * |
|---|
| 523 | * @since 2.3.0 |
|---|
| 524 | * |
|---|
| 525 | * @param string $redirect_url The redirect URL. |
|---|
| 526 | * @param string $requested_url The requested URL. |
|---|
| 527 | */ |
|---|
| 528 | $redirect_url = apply_filters( 'redirect_canonical', $redirect_url, $requested_url ); |
|---|
| 529 | |
|---|
| 530 | // yes, again -- in case the filter aborted the request |
|---|
| 531 | if ( ! $redirect_url || strip_fragment_from_url( $redirect_url ) == strip_fragment_from_url( $requested_url ) ) { |
|---|
| 532 | return; |
|---|
| 533 | } |
|---|
| 534 | |
|---|
| 535 | if ( $do_redirect ) { |
|---|
| 536 | // protect against chained redirects |
|---|
| 537 | if ( !redirect_canonical($redirect_url, false) ) { |
|---|
| 538 | wp_redirect($redirect_url, 301); |
|---|
| 539 | exit(); |
|---|
| 540 | } else { |
|---|
| 541 | // Debug |
|---|
| 542 | // die("1: $redirect_url<br />2: " . redirect_canonical( $redirect_url, false ) ); |
|---|
| 543 | return; |
|---|
| 544 | } |
|---|
| 545 | } else { |
|---|
| 546 | return $redirect_url; |
|---|
| 547 | } |
|---|
| 548 | } |
|---|
| 549 | |
|---|
| 550 | /** |
|---|
| 551 | * Removes arguments from a query string if they are not present in a URL |
|---|
| 552 | * DO NOT use this in plugin code. |
|---|
| 553 | * |
|---|
| 554 | * @since 3.4.0 |
|---|
| 555 | * @access private |
|---|
| 556 | * |
|---|
| 557 | * @param string $query_string |
|---|
| 558 | * @param array $args_to_check |
|---|
| 559 | * @param string $url |
|---|
| 560 | * @return string The altered query string |
|---|
| 561 | */ |
|---|
| 562 | function _remove_qs_args_if_not_in_url( $query_string, Array $args_to_check, $url ) { |
|---|
| 563 | $parsed_url = @parse_url( $url ); |
|---|
| 564 | if ( ! empty( $parsed_url['query'] ) ) { |
|---|
| 565 | parse_str( $parsed_url['query'], $parsed_query ); |
|---|
| 566 | foreach ( $args_to_check as $qv ) { |
|---|
| 567 | if ( !isset( $parsed_query[$qv] ) ) |
|---|
| 568 | $query_string = remove_query_arg( $qv, $query_string ); |
|---|
| 569 | } |
|---|
| 570 | } else { |
|---|
| 571 | $query_string = remove_query_arg( $args_to_check, $query_string ); |
|---|
| 572 | } |
|---|
| 573 | return $query_string; |
|---|
| 574 | } |
|---|
| 575 | |
|---|
| 576 | /** |
|---|
| 577 | * Strips the #fragment from a URL, if one is present. |
|---|
| 578 | * |
|---|
| 579 | * @since 4.4.0 |
|---|
| 580 | * |
|---|
| 581 | * @param string $url The URL to strip. |
|---|
| 582 | * @return string The altered URL. |
|---|
| 583 | */ |
|---|
| 584 | function strip_fragment_from_url( $url ) { |
|---|
| 585 | $parsed_url = @parse_url( $url ); |
|---|
| 586 | if ( ! empty( $parsed_url['host'] ) ) { |
|---|
| 587 | // This mirrors code in redirect_canonical(). It does not handle every case. |
|---|
| 588 | $url = $parsed_url['scheme'] . '://' . $parsed_url['host']; |
|---|
| 589 | if ( ! empty( $parsed_url['port'] ) ) { |
|---|
| 590 | $url .= ':' . $parsed_url['port']; |
|---|
| 591 | } |
|---|
| 592 | |
|---|
| 593 | if ( ! empty( $parsed_url['path'] ) ) { |
|---|
| 594 | $url .= $parsed_url['path']; |
|---|
| 595 | } |
|---|
| 596 | |
|---|
| 597 | if ( ! empty( $parsed_url['query'] ) ) { |
|---|
| 598 | $url .= '?' . $parsed_url['query']; |
|---|
| 599 | } |
|---|
| 600 | } |
|---|
| 601 | |
|---|
| 602 | return $url; |
|---|
| 603 | } |
|---|
| 604 | |
|---|
| 605 | /** |
|---|
| 606 | * Attempts to guess the correct URL based on query vars |
|---|
| 607 | * |
|---|
| 608 | * @since 2.3.0 |
|---|
| 609 | * |
|---|
| 610 | * @global wpdb $wpdb WordPress database abstraction object. |
|---|
| 611 | * |
|---|
| 612 | * @return false|string The correct URL if one is found. False on failure. |
|---|
| 613 | */ |
|---|
| 614 | function redirect_guess_404_permalink() { |
|---|
| 615 | global $wpdb; |
|---|
| 616 | |
|---|
| 617 | if ( get_query_var('name') ) { |
|---|
| 618 | $where = $wpdb->prepare("post_name LIKE %s", $wpdb->esc_like( get_query_var('name') ) . '%'); |
|---|
| 619 | |
|---|
| 620 | // if any of post_type, year, monthnum, or day are set, use them to refine the query |
|---|
| 621 | if ( get_query_var('post_type') ) |
|---|
| 622 | $where .= $wpdb->prepare(" AND post_type = %s", get_query_var('post_type')); |
|---|
| 623 | else |
|---|
| 624 | $where .= " AND post_type IN ('" . implode( "', '", get_post_types( array( 'public' => true ) ) ) . "')"; |
|---|
| 625 | |
|---|
| 626 | if ( get_query_var('year') ) |
|---|
| 627 | $where .= $wpdb->prepare(" AND YEAR(post_date) = %d", get_query_var('year')); |
|---|
| 628 | if ( get_query_var('monthnum') ) |
|---|
| 629 | $where .= $wpdb->prepare(" AND MONTH(post_date) = %d", get_query_var('monthnum')); |
|---|
| 630 | if ( get_query_var('day') ) |
|---|
| 631 | $where .= $wpdb->prepare(" AND DAYOFMONTH(post_date) = %d", get_query_var('day')); |
|---|
| 632 | |
|---|
| 633 | $post_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE $where AND post_status = 'publish'"); |
|---|
| 634 | if ( ! $post_id ) |
|---|
| 635 | return false; |
|---|
| 636 | if ( get_query_var( 'feed' ) ) |
|---|
| 637 | return get_post_comments_feed_link( $post_id, get_query_var( 'feed' ) ); |
|---|
| 638 | elseif ( get_query_var( 'page' ) && 1 < get_query_var( 'page' ) ) |
|---|
| 639 | return trailingslashit( get_permalink( $post_id ) ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' ); |
|---|
| 640 | else |
|---|
| 641 | return get_permalink( $post_id ); |
|---|
| 642 | } |
|---|
| 643 | |
|---|
| 644 | return false; |
|---|
| 645 | } |
|---|
| 646 | |
|---|
| 647 | /** |
|---|
| 648 | * Redirects a variety of shorthand URLs to the admin. |
|---|
| 649 | * |
|---|
| 650 | * If a user visits example.com/admin, they'll be redirected to /wp-admin. |
|---|
| 651 | * Visiting /login redirects to /wp-login.php, and so on. |
|---|
| 652 | * |
|---|
| 653 | * @since 3.4.0 |
|---|
| 654 | * |
|---|
| 655 | * @global WP_Rewrite $wp_rewrite |
|---|
| 656 | */ |
|---|
| 657 | function wp_redirect_admin_locations() { |
|---|
| 658 | global $wp_rewrite; |
|---|
| 659 | if ( ! ( is_404() && $wp_rewrite->using_permalinks() ) ) |
|---|
| 660 | return; |
|---|
| 661 | |
|---|
| 662 | $admins = array( |
|---|
| 663 | home_url( 'wp-admin', 'relative' ), |
|---|
| 664 | home_url( 'dashboard', 'relative' ), |
|---|
| 665 | home_url( 'admin', 'relative' ), |
|---|
| 666 | site_url( 'dashboard', 'relative' ), |
|---|
| 667 | site_url( 'admin', 'relative' ), |
|---|
| 668 | ); |
|---|
| 669 | if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $admins ) ) { |
|---|
| 670 | wp_redirect( admin_url() ); |
|---|
| 671 | exit; |
|---|
| 672 | } |
|---|
| 673 | |
|---|
| 674 | $logins = array( |
|---|
| 675 | home_url( 'wp-login.php', 'relative' ), |
|---|
| 676 | home_url( 'login', 'relative' ), |
|---|
| 677 | site_url( 'login', 'relative' ), |
|---|
| 678 | ); |
|---|
| 679 | if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $logins ) ) { |
|---|
| 680 | wp_redirect( wp_login_url() ); |
|---|
| 681 | exit; |
|---|
| 682 | } |
|---|
| 683 | } |
|---|