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1 <?php 2 /** 3 * Canonical API to handle WordPress Redirecting 4 * 5 * Based on "Permalink Redirect" from Scott Yang and "Enforce www. Preference" 6 * by Mark Jaquith 7 * 8 * @package WordPress 9 * @since 2.3.0 10 */ 11 12 /** 13 * Redirects incoming links to the proper URL based on the site url. 14 * 15 * Search engines consider www.somedomain.com and somedomain.com to be two 16 * different URLs when they both go to the same location. This SEO enhancement 17 * prevents penalty for duplicate content by redirecting all incoming links to 18 * one or the other. 19 * 20 * Prevents redirection for feeds, trackbacks, searches, comment popup, and 21 * admin URLs. Does not redirect on IIS, page/post previews, and on form data. 22 * 23 * Will also attempt to find the correct link when a user enters a URL that does 24 * not exist based on exact WordPress query. Will instead try to parse the URL 25 * or query in an attempt to figure the correct page to go to. 26 * 27 * @since 2.3.0 28 * @uses $wp_rewrite 29 * @uses $is_IIS 30 * 31 * @param string $requested_url Optional. The URL that was requested, used to 32 * figure if redirect is needed. 33 * @param bool $do_redirect Optional. Redirect to the new URL. 34 * @return null|false|string Null, if redirect not needed. False, if redirect 35 * not needed or the string of the URL 36 */ 37 function redirect_canonical( $requested_url = null, $do_redirect = true ) { 38 global $wp_rewrite, $is_IIS, $wp_query, $wpdb; 39 40 if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || !empty($_POST) || is_preview() || is_robots() || $is_IIS ) 41 return; 42 43 if ( !$requested_url ) { 44 // build the URL in the address bar 45 $requested_url = is_ssl() ? 'https://' : 'http://'; 46 $requested_url .= $_SERVER['HTTP_HOST']; 47 $requested_url .= $_SERVER['REQUEST_URI']; 48 } 49 50 $original = @parse_url($requested_url); 51 if ( false === $original ) 52 return; 53 54 // Some PHP setups turn requests for / into /index.php in REQUEST_URI 55 // See: http://trac.wordpress.org/ticket/5017 56 // See: http://trac.wordpress.org/ticket/7173 57 // Disabled, for now: 58 // $original['path'] = preg_replace('|/index\.php$|', '/', $original['path']); 59 60 $redirect = $original; 61 $redirect_url = false; 62 63 // Notice fixing 64 if ( !isset($redirect['path']) ) 65 $redirect['path'] = ''; 66 if ( !isset($redirect['query']) ) 67 $redirect['query'] = ''; 68 69 if ( is_feed() && ( $id = get_query_var( 'p' ) ) ) { 70 if ( $redirect_url = get_post_comments_feed_link( $id, get_query_var( 'feed' ) ) ) { 71 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type', 'feed'), $redirect_url ); 72 $redirect['path'] = parse_url( $redirect_url, PHP_URL_PATH ); 73 } 74 } 75 76 if ( is_singular() && 1 > $wp_query->post_count && ($id = get_query_var('p')) ) { 77 78 $vars = $wpdb->get_results( $wpdb->prepare("SELECT post_type, post_parent FROM $wpdb->posts WHERE ID = %d", $id) ); 79 80 if ( isset($vars[0]) && $vars = $vars[0] ) { 81 if ( 'revision' == $vars->post_type && $vars->post_parent > 0 ) 82 $id = $vars->post_parent; 83 84 if ( $redirect_url = get_permalink($id) ) 85 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); 86 } 87 } 88 89 // These tests give us a WP-generated permalink 90 if ( is_404() ) { 91 92 // Redirect ?page_id, ?p=, ?attachment_id= to their respective url's 93 $id = max( get_query_var('p'), get_query_var('page_id'), get_query_var('attachment_id') ); 94 if ( $id && $redirect_post = get_post($id) ) { 95 $post_type_obj = get_post_type_object($redirect_post->post_type); 96 if ( $post_type_obj->public ) { 97 $redirect_url = get_permalink($redirect_post); 98 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); 99 } 100 } 101 102 if ( ! $redirect_url ) { 103 if ( $redirect_url = redirect_guess_404_permalink( $requested_url ) ) { 104 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'page', 'feed', 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); 105 } 106 } 107 108 } elseif ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) { 109 // rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101 110 if ( is_attachment() && !empty($_GET['attachment_id']) && ! $redirect_url ) { 111 if ( $redirect_url = get_attachment_link(get_query_var('attachment_id')) ) 112 $redirect['query'] = remove_query_arg('attachment_id', $redirect['query']); 113 } elseif ( is_single() && !empty($_GET['p']) && ! $redirect_url ) { 114 if ( $redirect_url = get_permalink(get_query_var('p')) ) 115 $redirect['query'] = remove_query_arg(array('p', 'post_type'), $redirect['query']); 116 } elseif ( is_single() && !empty($_GET['name']) && ! $redirect_url ) { 117 if ( $redirect_url = get_permalink( $wp_query->get_queried_object_id() ) ) 118 $redirect['query'] = remove_query_arg('name', $redirect['query']); 119 } elseif ( is_page() && !empty($_GET['page_id']) && ! $redirect_url ) { 120 if ( $redirect_url = get_permalink(get_query_var('page_id')) ) 121 $redirect['query'] = remove_query_arg('page_id', $redirect['query']); 122 } elseif ( is_page() && !is_feed() && isset($wp_query->queried_object) && 'page' == get_option('show_on_front') && $wp_query->queried_object->ID == get_option('page_on_front') && ! $redirect_url ) { 123 $redirect_url = home_url('/'); 124 } elseif ( is_home() && !empty($_GET['page_id']) && 'page' == get_option('show_on_front') && get_query_var('page_id') == get_option('page_for_posts') && ! $redirect_url ) { 125 if ( $redirect_url = get_permalink(get_option('page_for_posts')) ) 126 $redirect['query'] = remove_query_arg('page_id', $redirect['query']); 127 } elseif ( !empty($_GET['m']) && ( is_year() || is_month() || is_day() ) ) { 128 $m = get_query_var('m'); 129 switch ( strlen($m) ) { 130 case 4: // Yearly 131 $redirect_url = get_year_link($m); 132 break; 133 case 6: // Monthly 134 $redirect_url = get_month_link( substr($m, 0, 4), substr($m, 4, 2) ); 135 break; 136 case 8: // Daily 137 $redirect_url = get_day_link(substr($m, 0, 4), substr($m, 4, 2), substr($m, 6, 2)); 138 break; 139 } 140 if ( $redirect_url ) 141 $redirect['query'] = remove_query_arg('m', $redirect['query']); 142 // now moving on to non ?m=X year/month/day links 143 } elseif ( is_day() && get_query_var('year') && get_query_var('monthnum') && !empty($_GET['day']) ) { 144 if ( $redirect_url = get_day_link(get_query_var('year'), get_query_var('monthnum'), get_query_var('day')) ) 145 $redirect['query'] = remove_query_arg(array('year', 'monthnum', 'day'), $redirect['query']); 146 } elseif ( is_month() && get_query_var('year') && !empty($_GET['monthnum']) ) { 147 if ( $redirect_url = get_month_link(get_query_var('year'), get_query_var('monthnum')) ) 148 $redirect['query'] = remove_query_arg(array('year', 'monthnum'), $redirect['query']); 149 } elseif ( is_year() && !empty($_GET['year']) ) { 150 if ( $redirect_url = get_year_link(get_query_var('year')) ) 151 $redirect['query'] = remove_query_arg('year', $redirect['query']); 152 } elseif ( is_author() && !empty($_GET['author']) && preg_match( '|^[0-9]+$|', $_GET['author'] ) ) { 153 $author = get_userdata(get_query_var('author')); 154 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 ) ) ) { 155 if ( $redirect_url = get_author_posts_url($author->ID, $author->user_nicename) ) 156 $redirect['query'] = remove_query_arg('author', $redirect['query']); 157 } 158 } elseif ( is_category() || is_tag() || is_tax() ) { // Terms (Tags/categories) 159 160 $term_count = 0; 161 foreach ( $wp_query->tax_query->queries as $tax_query ) 162 $term_count += count( $tax_query['terms'] ); 163 164 $obj = $wp_query->get_queried_object(); 165 if ( $term_count <= 1 && !empty($obj->term_id) && ( $tax_url = get_term_link((int)$obj->term_id, $obj->taxonomy) ) && !is_wp_error($tax_url) ) { 166 if ( !empty($redirect['query']) ) { 167 // Strip taxonomy query vars off the url. 168 $qv_remove = array( 'term', 'taxonomy'); 169 if ( is_category() ) { 170 $qv_remove[] = 'category_name'; 171 $qv_remove[] = 'cat'; 172 } elseif ( is_tag() ) { 173 $qv_remove[] = 'tag'; 174 $qv_remove[] = 'tag_id'; 175 } else { // Custom taxonomies will have a custom query var, remove those too: 176 $tax_obj = get_taxonomy( $obj->taxonomy ); 177 if ( false !== $tax_obj->query_var ) 178 $qv_remove[] = $tax_obj->query_var; 179 } 180 181 $rewrite_vars = array_diff( array_keys($wp_query->query), array_keys($_GET) ); 182 183 if ( !array_diff($rewrite_vars, array_keys($_GET)) ) { // Check to see if all the Query vars are coming from the rewrite, none are set via $_GET 184 $redirect['query'] = remove_query_arg($qv_remove, $redirect['query']); //Remove all of the per-tax qv's 185 186 // Create the destination url for this taxonomy 187 $tax_url = parse_url($tax_url); 188 if ( ! empty($tax_url['query']) ) { // Taxonomy accessible via ?taxonomy=..&term=.. or any custom qv.. 189 parse_str($tax_url['query'], $query_vars); 190 $redirect['query'] = add_query_arg($query_vars, $redirect['query']); 191 } else { // Taxonomy is accessible via a "pretty-URL" 192 $redirect['path'] = $tax_url['path']; 193 } 194 195 } else { // Some query vars are set via $_GET. Unset those from $_GET that exist via the rewrite 196 foreach ( $qv_remove as $_qv ) { 197 if ( isset($rewrite_vars[$_qv]) ) 198 $redirect['query'] = remove_query_arg($_qv, $redirect['query']); 199 } 200 } 201 } 202 203 } 204 } elseif ( is_single() && strpos($wp_rewrite->permalink_structure, '%category%') !== false && $cat = get_query_var( 'category_name' ) ) { 205 $category = get_category_by_path( $cat ); 206 $post_terms = wp_get_object_terms($wp_query->get_queried_object_id(), 'category', array('fields' => 'tt_ids')); 207 if ( (!$category || is_wp_error($category)) || ( !is_wp_error($post_terms) && !empty($post_terms) && !in_array($category->term_taxonomy_id, $post_terms) ) ) 208 $redirect_url = get_permalink($wp_query->get_queried_object_id()); 209 } 210 211 // Post Paging 212 if ( is_singular() && ! is_front_page() && get_query_var('page') ) { 213 if ( !$redirect_url ) 214 $redirect_url = get_permalink( get_queried_object_id() ); 215 $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' ); 216 $redirect['query'] = remove_query_arg( 'page', $redirect['query'] ); 217 } 218 219 // paging and feeds 220 if ( get_query_var('paged') || is_feed() || get_query_var('cpage') ) { 221 while ( preg_match( "#/$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'] ) ) { 222 // Strip off paging and feed 223 $redirect['path'] = preg_replace("#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", '/', $redirect['path']); // strip off any existing paging 224 $redirect['path'] = preg_replace('#/(comments/?)?(feed|rss2?|rdf|atom)(/+|$)#', '/', $redirect['path']); // strip off feed endings 225 $redirect['path'] = preg_replace('#/comment-page-[0-9]+?(/+)?$#', '/', $redirect['path']); // strip off any existing comment paging 226 } 227 228 $addl_path = ''; 229 if ( is_feed() && in_array( get_query_var('feed'), $wp_rewrite->feeds ) ) { 230 $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; 231 if ( !is_singular() && get_query_var( 'withcomments' ) ) 232 $addl_path .= 'comments/'; 233 if ( ( 'rss' == get_default_feed() && 'feed' == get_query_var('feed') ) || 'rss' == get_query_var('feed') ) 234 $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == 'rss2' ) ? '' : 'rss2' ), 'feed' ); 235 else 236 $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == get_query_var('feed') || 'feed' == get_query_var('feed') ) ? '' : get_query_var('feed') ), 'feed' ); 237 $redirect['query'] = remove_query_arg( 'feed', $redirect['query'] ); 238 } elseif ( is_feed() && 'old' == get_query_var('feed') ) { 239 $old_feed_files = array( 240 'wp-atom.php' => 'atom', 241 'wp-commentsrss2.php' => 'comments_rss2', 242 'wp-feed.php' => get_default_feed(), 243 'wp-rdf.php' => 'rdf', 244 'wp-rss.php' => 'rss2', 245 'wp-rss2.php' => 'rss2', 246 ); 247 if ( isset( $old_feed_files[ basename( $redirect['path'] ) ] ) ) { 248 $redirect_url = get_feed_link( $old_feed_files[ basename( $redirect['path'] ) ] ); 249 wp_redirect( $redirect_url, 301 ); 250 die(); 251 } 252 } 253 254 if ( get_query_var('paged') > 0 ) { 255 $paged = get_query_var('paged'); 256 $redirect['query'] = remove_query_arg( 'paged', $redirect['query'] ); 257 if ( !is_feed() ) { 258 if ( $paged > 1 && !is_single() ) { 259 $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit("$wp_rewrite->pagination_base/$paged", 'paged'); 260 } elseif ( !is_single() ) { 261 $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; 262 } 263 } elseif ( $paged > 1 ) { 264 $redirect['query'] = add_query_arg( 'paged', $paged, $redirect['query'] ); 265 } 266 } 267 268 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 ) ) ) { 269 $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit( 'comment-page-' . get_query_var('cpage'), 'commentpaged' ); 270 $redirect['query'] = remove_query_arg( 'cpage', $redirect['query'] ); 271 } 272 273 $redirect['path'] = user_trailingslashit( preg_replace('|/index.php/?$|', '/', $redirect['path']) ); // strip off trailing /index.php/ 274 if ( !empty( $addl_path ) && $wp_rewrite->using_index_permalinks() && strpos($redirect['path'], '/index.php/') === false ) 275 $redirect['path'] = trailingslashit($redirect['path']) . 'index.php/'; 276 if ( !empty( $addl_path ) ) 277 $redirect['path'] = trailingslashit($redirect['path']) . $addl_path; 278 $redirect_url = $redirect['scheme'] . '://' . $redirect['host'] . $redirect['path']; 279 } 280 281 if ( 'wp-register.php' == basename( $redirect['path'] ) ) { 282 if ( is_multisite() ) 283 $redirect_url = apply_filters( 'wp_signup_location', site_url( 'wp-signup.php' ) ); 284 else 285 $redirect_url = site_url( 'wp-login.php?action=register' ); 286 wp_redirect( $redirect_url, 301 ); 287 die(); 288 } 289 } 290 291 // tack on any additional query vars 292 $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); 293 if ( $redirect_url && !empty($redirect['query']) ) { 294 parse_str( $redirect['query'], $_parsed_query ); 295 $redirect = @parse_url($redirect_url); 296 297 if ( ! empty( $_parsed_query['name'] ) && ! empty( $redirect['query'] ) ) { 298 parse_str( $redirect['query'], $_parsed_redirect_query ); 299 300 if ( empty( $_parsed_redirect_query['name'] ) ) 301 unset( $_parsed_query['name'] ); 302 } 303 304 $_parsed_query = rawurlencode_deep( $_parsed_query ); 305 $redirect_url = add_query_arg( $_parsed_query, $redirect_url ); 306 } 307 308 if ( $redirect_url ) 309 $redirect = @parse_url($redirect_url); 310 311 // www.example.com vs example.com 312 $user_home = @parse_url(home_url()); 313 if ( !empty($user_home['host']) ) 314 $redirect['host'] = $user_home['host']; 315 if ( empty($user_home['path']) ) 316 $user_home['path'] = '/'; 317 318 // Handle ports 319 if ( !empty($user_home['port']) ) 320 $redirect['port'] = $user_home['port']; 321 else 322 unset($redirect['port']); 323 324 // trailing /index.php 325 $redirect['path'] = preg_replace('|/index.php/*?$|', '/', $redirect['path']); 326 327 // Remove trailing spaces from the path 328 $redirect['path'] = preg_replace( '#(%20| )+$#', '', $redirect['path'] ); 329 330 if ( !empty( $redirect['query'] ) ) { 331 // Remove trailing spaces from certain terminating query string args 332 $redirect['query'] = preg_replace( '#((p|page_id|cat|tag)=[^&]*?)(%20| )+$#', '$1', $redirect['query'] ); 333 334 // Clean up empty query strings 335 $redirect['query'] = trim(preg_replace( '#(^|&)(p|page_id|cat|tag)=?(&|$)#', '&', $redirect['query']), '&'); 336 337 // Redirect obsolete feeds 338 $redirect['query'] = preg_replace( '#(^|&)feed=rss(&|$)#', '$1feed=rss2$3', $redirect['query'] ); 339 340 // Remove redundant leading ampersands 341 $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); 342 } 343 344 // strip /index.php/ when we're not using PATHINFO permalinks 345 if ( !$wp_rewrite->using_index_permalinks() ) 346 $redirect['path'] = str_replace('/index.php/', '/', $redirect['path']); 347 348 // trailing slashes 349 if ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() && !is_404() && (!is_front_page() || ( is_front_page() && (get_query_var('paged') > 1) ) ) ) { 350 $user_ts_type = ''; 351 if ( get_query_var('paged') > 0 ) { 352 $user_ts_type = 'paged'; 353 } else { 354 foreach ( array('single', 'category', 'page', 'day', 'month', 'year', 'home') as $type ) { 355 $func = 'is_' . $type; 356 if ( call_user_func($func) ) { 357 $user_ts_type = $type; 358 break; 359 } 360 } 361 } 362 $redirect['path'] = user_trailingslashit($redirect['path'], $user_ts_type); 363 } elseif ( is_front_page() ) { 364 $redirect['path'] = trailingslashit($redirect['path']); 365 } 366 367 // Strip multiple slashes out of the URL 368 if ( strpos($redirect['path'], '//') > -1 ) 369 $redirect['path'] = preg_replace('|/+|', '/', $redirect['path']); 370 371 // Always trailing slash the Front Page URL 372 if ( trailingslashit( $redirect['path'] ) == trailingslashit( $user_home['path'] ) ) 373 $redirect['path'] = trailingslashit($redirect['path']); 374 375 // Ignore differences in host capitalization, as this can lead to infinite redirects 376 // Only redirect no-www <=> yes-www 377 if ( strtolower($original['host']) == strtolower($redirect['host']) || 378 ( strtolower($original['host']) != 'www.' . strtolower($redirect['host']) && 'www.' . strtolower($original['host']) != strtolower($redirect['host']) ) ) 379 $redirect['host'] = $original['host']; 380 381 $compare_original = array($original['host'], $original['path']); 382 383 if ( !empty( $original['port'] ) ) 384 $compare_original[] = $original['port']; 385 386 if ( !empty( $original['query'] ) ) 387 $compare_original[] = $original['query']; 388 389 $compare_redirect = array($redirect['host'], $redirect['path']); 390 391 if ( !empty( $redirect['port'] ) ) 392 $compare_redirect[] = $redirect['port']; 393 394 if ( !empty( $redirect['query'] ) ) 395 $compare_redirect[] = $redirect['query']; 396 397 if ( $compare_original !== $compare_redirect ) { 398 $redirect_url = $redirect['scheme'] . '://' . $redirect['host']; 399 if ( !empty($redirect['port']) ) 400 $redirect_url .= ':' . $redirect['port']; 401 $redirect_url .= $redirect['path']; 402 if ( !empty($redirect['query']) ) 403 $redirect_url .= '?' . $redirect['query']; 404 } 405 406 if ( !$redirect_url || $redirect_url == $requested_url ) 407 return false; 408 409 // Hex encoded octets are case-insensitive. 410 if ( false !== strpos($requested_url, '%') ) { 411 if ( !function_exists('lowercase_octets') ) { 412 function lowercase_octets($matches) { 413 return strtolower( $matches[0] ); 414 } 415 } 416 $requested_url = preg_replace_callback('|%[a-fA-F0-9][a-fA-F0-9]|', 'lowercase_octets', $requested_url); 417 } 418 419 // Note that you can use the "redirect_canonical" filter to cancel a canonical redirect for whatever reason by returning false 420 $redirect_url = apply_filters('redirect_canonical', $redirect_url, $requested_url); 421 422 if ( !$redirect_url || $redirect_url == $requested_url ) // yes, again -- in case the filter aborted the request 423 return false; 424 425 if ( $do_redirect ) { 426 // protect against chained redirects 427 if ( !redirect_canonical($redirect_url, false) ) { 428 wp_redirect($redirect_url, 301); 429 exit(); 430 } else { 431 // Debug 432 // die("1: $redirect_url<br />2: " . redirect_canonical( $redirect_url, false ) ); 433 return false; 434 } 435 } else { 436 return $redirect_url; 437 } 438 } 439 440 /** 441 * Removes arguments from a query string if they are not present in a URL 442 * DO NOT use this in plugin code. 443 * 444 * @since 3.4 445 * @access private 446 * 447 * @return string The altered query string 448 */ 449 function _remove_qs_args_if_not_in_url( $query_string, Array $args_to_check, $url ) { 450 $parsed_url = @parse_url( $url ); 451 if ( ! empty( $parsed_url['query'] ) ) { 452 parse_str( $parsed_url['query'], $parsed_query ); 453 foreach ( $args_to_check as $qv ) { 454 if ( !isset( $parsed_query[$qv] ) ) 455 $query_string = remove_query_arg( $qv, $query_string ); 456 } 457 } else { 458 $query_string = remove_query_arg( $args_to_check, $query_string ); 459 } 460 return $query_string; 461 } 462 463 /** 464 * Attempts to guess the correct URL from the current URL (that produced a 404) or 465 * the current query variables. 466 * 467 * @since 2.3.0 468 * @uses $wpdb 469 * 470 * @param string $current_url Optional. The URL that has 404'd. 471 * @return bool|string The correct URL if one is found. False on failure. 472 */ 473 function redirect_guess_404_permalink( $current_url = '' ) { 474 global $wpdb, $wp_rewrite; 475 476 if ( ! empty( $current_url ) ) 477 $parsed_url = @parse_url( $current_url ); 478 479 // Attempt to redirect bare category slugs if the permalink structure starts 480 // with the %category% tag. 481 if ( isset( $parsed_url['path'] ) 482 && preg_match( '#^[^%]+%category%#', $wp_rewrite->permalink_structure ) 483 && $cat = get_category_by_path( $parsed_url['path'] ) 484 ) { 485 if ( ! is_wp_error( $cat ) ) 486 return get_term_link( $cat ); 487 } 488 489 if ( get_query_var('name') ) { 490 $where = $wpdb->prepare("post_name LIKE %s", like_escape( get_query_var('name') ) . '%'); 491 492 // if any of post_type, year, monthnum, or day are set, use them to refine the query 493 if ( get_query_var('post_type') ) 494 $where .= $wpdb->prepare(" AND post_type = %s", get_query_var('post_type')); 495 else 496 $where .= " AND post_type IN ('" . implode( "', '", get_post_types( array( 'public' => true ) ) ) . "')"; 497 498 if ( get_query_var('year') ) 499 $where .= $wpdb->prepare(" AND YEAR(post_date) = %d", get_query_var('year')); 500 if ( get_query_var('monthnum') ) 501 $where .= $wpdb->prepare(" AND MONTH(post_date) = %d", get_query_var('monthnum')); 502 if ( get_query_var('day') ) 503 $where .= $wpdb->prepare(" AND DAYOFMONTH(post_date) = %d", get_query_var('day')); 504 505 $post_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE $where AND post_status = 'publish'"); 506 if ( ! $post_id ) 507 return false; 508 if ( get_query_var( 'feed' ) ) 509 return get_post_comments_feed_link( $post_id, get_query_var( 'feed' ) ); 510 elseif ( get_query_var( 'page' ) ) 511 return trailingslashit( get_permalink( $post_id ) ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' ); 512 else 513 return get_permalink( $post_id ); 514 } 515 516 return false; 517 } 518 519 add_action('template_redirect', 'redirect_canonical'); 520 521 function wp_redirect_admin_locations() { 522 global $wp_rewrite; 523 if ( ! ( is_404() && $wp_rewrite->using_permalinks() ) ) 524 return; 525 526 $admins = array( 527 home_url( 'wp-admin', 'relative' ), 528 home_url( 'dashboard', 'relative' ), 529 home_url( 'admin', 'relative' ), 530 site_url( 'dashboard', 'relative' ), 531 site_url( 'admin', 'relative' ), 532 ); 533 if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $admins ) ) { 534 wp_redirect( admin_url() ); 535 exit; 536 } 537 538 $logins = array( 539 home_url( 'wp-login.php', 'relative' ), 540 home_url( 'login', 'relative' ), 541 site_url( 'login', 'relative' ), 542 ); 543 if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $logins ) ) { 544 wp_redirect( site_url( 'wp-login.php', 'login' ) ); 545 exit; 546 } 547 } 548 549 add_action( 'template_redirect', 'wp_redirect_admin_locations', 1000 );
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| Generated: Fri May 25 03:56:23 2012 | Hosted by follow the white rabbit. |