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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 non-pretty-permalink-supporting IIS 7+, 22 * page/post previews, WP admin, Trackbacks, robots.txt, searches, or on POST 23 * requests. 24 * 25 * Will also attempt to find the correct link when a user enters a URL that does 26 * not exist based on exact WordPress query. Will instead try to parse the URL 27 * or query in an attempt to figure the correct page to go to. 28 * 29 * @since 2.3.0 30 * @uses $wp_rewrite 31 * @uses $is_IIS 32 * 33 * @param string $requested_url Optional. The URL that was requested, used to 34 * figure if redirect is needed. 35 * @param bool $do_redirect Optional. Redirect to the new URL. 36 * @return null|false|string Null, if redirect not needed. False, if redirect 37 * not needed or the string of the URL 38 */ 39 function redirect_canonical( $requested_url = null, $do_redirect = true ) { 40 global $wp_rewrite, $is_IIS, $wp_query, $wpdb; 41 42 if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || !empty($_POST) || is_preview() || is_robots() || ( $is_IIS && !iis7_supports_permalinks() ) ) 43 return; 44 45 if ( !$requested_url ) { 46 // build the URL in the address bar 47 $requested_url = is_ssl() ? 'https://' : 'http://'; 48 $requested_url .= $_SERVER['HTTP_HOST']; 49 $requested_url .= $_SERVER['REQUEST_URI']; 50 } 51 52 $original = @parse_url($requested_url); 53 if ( false === $original ) 54 return; 55 56 // Some PHP setups turn requests for / into /index.php in REQUEST_URI 57 // See: http://trac.wordpress.org/ticket/5017 58 // See: http://trac.wordpress.org/ticket/7173 59 // Disabled, for now: 60 // $original['path'] = preg_replace('|/index\.php$|', '/', $original['path']); 61 62 $redirect = $original; 63 $redirect_url = false; 64 65 // Notice fixing 66 if ( !isset($redirect['path']) ) 67 $redirect['path'] = ''; 68 if ( !isset($redirect['query']) ) 69 $redirect['query'] = ''; 70 71 if ( is_feed() && ( $id = get_query_var( 'p' ) ) ) { 72 if ( $redirect_url = get_post_comments_feed_link( $id, get_query_var( 'feed' ) ) ) { 73 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type', 'feed'), $redirect_url ); 74 $redirect['path'] = parse_url( $redirect_url, PHP_URL_PATH ); 75 } 76 } 77 78 if ( is_singular() && 1 > $wp_query->post_count && ($id = get_query_var('p')) ) { 79 80 $vars = $wpdb->get_results( $wpdb->prepare("SELECT post_type, post_parent FROM $wpdb->posts WHERE ID = %d", $id) ); 81 82 if ( isset($vars[0]) && $vars = $vars[0] ) { 83 if ( 'revision' == $vars->post_type && $vars->post_parent > 0 ) 84 $id = $vars->post_parent; 85 86 if ( $redirect_url = get_permalink($id) ) 87 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); 88 } 89 } 90 91 // These tests give us a WP-generated permalink 92 if ( is_404() ) { 93 94 // Redirect ?page_id, ?p=, ?attachment_id= to their respective url's 95 $id = max( get_query_var('p'), get_query_var('page_id'), get_query_var('attachment_id') ); 96 if ( $id && $redirect_post = get_post($id) ) { 97 $post_type_obj = get_post_type_object($redirect_post->post_type); 98 if ( $post_type_obj->public ) { 99 $redirect_url = get_permalink($redirect_post); 100 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); 101 } 102 } 103 104 if ( get_query_var( 'day' ) && get_query_var( 'monthnum' ) && get_query_var( 'year' ) ) { 105 $year = get_query_var( 'year' ); 106 $month = get_query_var( 'monthnum' ); 107 $day = get_query_var( 'day' ); 108 $date = sprintf( '%04d-%02d-%02d', $year, $month, $day ); 109 if ( ! wp_checkdate( $month, $day, $year, $date ) ) { 110 $redirect_url = get_month_link( $year, $month ); 111 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'year', 'monthnum', 'day' ), $redirect_url ); 112 } 113 } elseif ( get_query_var( 'monthnum' ) && get_query_var( 'year' ) && 12 < get_query_var( 'monthnum' ) ) { 114 $redirect_url = get_year_link( get_query_var( 'year' ) ); 115 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'year', 'monthnum' ), $redirect_url ); 116 } 117 118 if ( ! $redirect_url ) { 119 if ( $redirect_url = redirect_guess_404_permalink() ) { 120 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'page', 'feed', 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); 121 } 122 } 123 124 } elseif ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) { 125 // rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101 126 if ( is_attachment() && !empty($_GET['attachment_id']) && ! $redirect_url ) { 127 if ( $redirect_url = get_attachment_link(get_query_var('attachment_id')) ) 128 $redirect['query'] = remove_query_arg('attachment_id', $redirect['query']); 129 } elseif ( is_single() && !empty($_GET['p']) && ! $redirect_url ) { 130 if ( $redirect_url = get_permalink(get_query_var('p')) ) 131 $redirect['query'] = remove_query_arg(array('p', 'post_type'), $redirect['query']); 132 } elseif ( is_single() && !empty($_GET['name']) && ! $redirect_url ) { 133 if ( $redirect_url = get_permalink( $wp_query->get_queried_object_id() ) ) 134 $redirect['query'] = remove_query_arg('name', $redirect['query']); 135 } elseif ( is_page() && !empty($_GET['page_id']) && ! $redirect_url ) { 136 if ( $redirect_url = get_permalink(get_query_var('page_id')) ) 137 $redirect['query'] = remove_query_arg('page_id', $redirect['query']); 138 } elseif ( is_page() && !is_feed() && isset($wp_query->queried_object) && 'page' == get_option('show_on_front') && $wp_query->queried_object->ID == get_option('page_on_front') && ! $redirect_url ) { 139 $redirect_url = home_url('/'); 140 } elseif ( is_home() && !empty($_GET['page_id']) && 'page' == get_option('show_on_front') && get_query_var('page_id') == get_option('page_for_posts') && ! $redirect_url ) { 141 if ( $redirect_url = get_permalink(get_option('page_for_posts')) ) 142 $redirect['query'] = remove_query_arg('page_id', $redirect['query']); 143 } elseif ( !empty($_GET['m']) && ( is_year() || is_month() || is_day() ) ) { 144 $m = get_query_var('m'); 145 switch ( strlen($m) ) { 146 case 4: // Yearly 147 $redirect_url = get_year_link($m); 148 break; 149 case 6: // Monthly 150 $redirect_url = get_month_link( substr($m, 0, 4), substr($m, 4, 2) ); 151 break; 152 case 8: // Daily 153 $redirect_url = get_day_link(substr($m, 0, 4), substr($m, 4, 2), substr($m, 6, 2)); 154 break; 155 } 156 if ( $redirect_url ) 157 $redirect['query'] = remove_query_arg('m', $redirect['query']); 158 // now moving on to non ?m=X year/month/day links 159 } elseif ( is_day() && get_query_var('year') && get_query_var('monthnum') && !empty($_GET['day']) ) { 160 if ( $redirect_url = get_day_link(get_query_var('year'), get_query_var('monthnum'), get_query_var('day')) ) 161 $redirect['query'] = remove_query_arg(array('year', 'monthnum', 'day'), $redirect['query']); 162 } elseif ( is_month() && get_query_var('year') && !empty($_GET['monthnum']) ) { 163 if ( $redirect_url = get_month_link(get_query_var('year'), get_query_var('monthnum')) ) 164 $redirect['query'] = remove_query_arg(array('year', 'monthnum'), $redirect['query']); 165 } elseif ( is_year() && !empty($_GET['year']) ) { 166 if ( $redirect_url = get_year_link(get_query_var('year')) ) 167 $redirect['query'] = remove_query_arg('year', $redirect['query']); 168 } elseif ( is_author() && !empty($_GET['author']) && preg_match( '|^[0-9]+$|', $_GET['author'] ) ) { 169 $author = get_userdata(get_query_var('author')); 170 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 ) ) ) { 171 if ( $redirect_url = get_author_posts_url($author->ID, $author->user_nicename) ) 172 $redirect['query'] = remove_query_arg('author', $redirect['query']); 173 } 174 } elseif ( is_category() || is_tag() || is_tax() ) { // Terms (Tags/categories) 175 176 $term_count = 0; 177 foreach ( $wp_query->tax_query->queries as $tax_query ) 178 $term_count += count( $tax_query['terms'] ); 179 180 $obj = $wp_query->get_queried_object(); 181 if ( $term_count <= 1 && !empty($obj->term_id) && ( $tax_url = get_term_link((int)$obj->term_id, $obj->taxonomy) ) && !is_wp_error($tax_url) ) { 182 if ( !empty($redirect['query']) ) { 183 // Strip taxonomy query vars off the url. 184 $qv_remove = array( 'term', 'taxonomy'); 185 if ( is_category() ) { 186 $qv_remove[] = 'category_name'; 187 $qv_remove[] = 'cat'; 188 } elseif ( is_tag() ) { 189 $qv_remove[] = 'tag'; 190 $qv_remove[] = 'tag_id'; 191 } else { // Custom taxonomies will have a custom query var, remove those too: 192 $tax_obj = get_taxonomy( $obj->taxonomy ); 193 if ( false !== $tax_obj->query_var ) 194 $qv_remove[] = $tax_obj->query_var; 195 } 196 197 $rewrite_vars = array_diff( array_keys($wp_query->query), array_keys($_GET) ); 198 199 if ( !array_diff($rewrite_vars, array_keys($_GET)) ) { // Check to see if all the Query vars are coming from the rewrite, none are set via $_GET 200 $redirect['query'] = remove_query_arg($qv_remove, $redirect['query']); //Remove all of the per-tax qv's 201 202 // Create the destination url for this taxonomy 203 $tax_url = parse_url($tax_url); 204 if ( ! empty($tax_url['query']) ) { // Taxonomy accessible via ?taxonomy=..&term=.. or any custom qv.. 205 parse_str($tax_url['query'], $query_vars); 206 $redirect['query'] = add_query_arg($query_vars, $redirect['query']); 207 } else { // Taxonomy is accessible via a "pretty-URL" 208 $redirect['path'] = $tax_url['path']; 209 } 210 211 } else { // Some query vars are set via $_GET. Unset those from $_GET that exist via the rewrite 212 foreach ( $qv_remove as $_qv ) { 213 if ( isset($rewrite_vars[$_qv]) ) 214 $redirect['query'] = remove_query_arg($_qv, $redirect['query']); 215 } 216 } 217 } 218 219 } 220 } elseif ( is_single() && strpos($wp_rewrite->permalink_structure, '%category%') !== false && $cat = get_query_var( 'category_name' ) ) { 221 $category = get_category_by_path( $cat ); 222 $post_terms = wp_get_object_terms($wp_query->get_queried_object_id(), 'category', array('fields' => 'tt_ids')); 223 if ( (!$category || is_wp_error($category)) || ( !is_wp_error($post_terms) && !empty($post_terms) && !in_array($category->term_taxonomy_id, $post_terms) ) ) 224 $redirect_url = get_permalink($wp_query->get_queried_object_id()); 225 } 226 227 // Post Paging 228 if ( is_singular() && ! is_front_page() && get_query_var('page') ) { 229 if ( !$redirect_url ) 230 $redirect_url = get_permalink( get_queried_object_id() ); 231 $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' ); 232 $redirect['query'] = remove_query_arg( 'page', $redirect['query'] ); 233 } 234 235 // paging and feeds 236 if ( get_query_var('paged') || is_feed() || get_query_var('cpage') ) { 237 while ( preg_match( "#/$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'] ) ) { 238 // Strip off paging and feed 239 $redirect['path'] = preg_replace("#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", '/', $redirect['path']); // strip off any existing paging 240 $redirect['path'] = preg_replace('#/(comments/?)?(feed|rss2?|rdf|atom)(/+|$)#', '/', $redirect['path']); // strip off feed endings 241 $redirect['path'] = preg_replace('#/comment-page-[0-9]+?(/+)?$#', '/', $redirect['path']); // strip off any existing comment paging 242 } 243 244 $addl_path = ''; 245 if ( is_feed() && in_array( get_query_var('feed'), $wp_rewrite->feeds ) ) { 246 $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; 247 if ( !is_singular() && get_query_var( 'withcomments' ) ) 248 $addl_path .= 'comments/'; 249 if ( ( 'rss' == get_default_feed() && 'feed' == get_query_var('feed') ) || 'rss' == get_query_var('feed') ) 250 $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == 'rss2' ) ? '' : 'rss2' ), 'feed' ); 251 else 252 $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == get_query_var('feed') || 'feed' == get_query_var('feed') ) ? '' : get_query_var('feed') ), 'feed' ); 253 $redirect['query'] = remove_query_arg( 'feed', $redirect['query'] ); 254 } elseif ( is_feed() && 'old' == get_query_var('feed') ) { 255 $old_feed_files = array( 256 'wp-atom.php' => 'atom', 257 'wp-commentsrss2.php' => 'comments_rss2', 258 'wp-feed.php' => get_default_feed(), 259 'wp-rdf.php' => 'rdf', 260 'wp-rss.php' => 'rss2', 261 'wp-rss2.php' => 'rss2', 262 ); 263 if ( isset( $old_feed_files[ basename( $redirect['path'] ) ] ) ) { 264 $redirect_url = get_feed_link( $old_feed_files[ basename( $redirect['path'] ) ] ); 265 wp_redirect( $redirect_url, 301 ); 266 die(); 267 } 268 } 269 270 if ( get_query_var('paged') > 0 ) { 271 $paged = get_query_var('paged'); 272 $redirect['query'] = remove_query_arg( 'paged', $redirect['query'] ); 273 if ( !is_feed() ) { 274 if ( $paged > 1 && !is_single() ) { 275 $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit("$wp_rewrite->pagination_base/$paged", 'paged'); 276 } elseif ( !is_single() ) { 277 $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; 278 } 279 } elseif ( $paged > 1 ) { 280 $redirect['query'] = add_query_arg( 'paged', $paged, $redirect['query'] ); 281 } 282 } 283 284 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 ) ) ) { 285 $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit( 'comment-page-' . get_query_var('cpage'), 'commentpaged' ); 286 $redirect['query'] = remove_query_arg( 'cpage', $redirect['query'] ); 287 } 288 289 $redirect['path'] = user_trailingslashit( preg_replace('|/' . preg_quote( $wp_rewrite->index, '|' ) . '/?$|', '/', $redirect['path']) ); // strip off trailing /index.php/ 290 if ( !empty( $addl_path ) && $wp_rewrite->using_index_permalinks() && strpos($redirect['path'], '/' . $wp_rewrite->index . '/') === false ) 291 $redirect['path'] = trailingslashit($redirect['path']) . $wp_rewrite->index . '/'; 292 if ( !empty( $addl_path ) ) 293 $redirect['path'] = trailingslashit($redirect['path']) . $addl_path; 294 $redirect_url = $redirect['scheme'] . '://' . $redirect['host'] . $redirect['path']; 295 } 296 297 if ( 'wp-register.php' == basename( $redirect['path'] ) ) { 298 if ( is_multisite() ) 299 /** This filter is documented in wp-login.php */ 300 $redirect_url = apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) ); 301 else 302 $redirect_url = site_url( 'wp-login.php?action=register' ); 303 wp_redirect( $redirect_url, 301 ); 304 die(); 305 } 306 } 307 308 // tack on any additional query vars 309 $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); 310 if ( $redirect_url && !empty($redirect['query']) ) { 311 parse_str( $redirect['query'], $_parsed_query ); 312 $redirect = @parse_url($redirect_url); 313 314 if ( ! empty( $_parsed_query['name'] ) && ! empty( $redirect['query'] ) ) { 315 parse_str( $redirect['query'], $_parsed_redirect_query ); 316 317 if ( empty( $_parsed_redirect_query['name'] ) ) 318 unset( $_parsed_query['name'] ); 319 } 320 321 $_parsed_query = rawurlencode_deep( $_parsed_query ); 322 $redirect_url = add_query_arg( $_parsed_query, $redirect_url ); 323 } 324 325 if ( $redirect_url ) 326 $redirect = @parse_url($redirect_url); 327 328 // www.example.com vs example.com 329 $user_home = @parse_url(home_url()); 330 if ( !empty($user_home['host']) ) 331 $redirect['host'] = $user_home['host']; 332 if ( empty($user_home['path']) ) 333 $user_home['path'] = '/'; 334 335 // Handle ports 336 if ( !empty($user_home['port']) ) 337 $redirect['port'] = $user_home['port']; 338 else 339 unset($redirect['port']); 340 341 // trailing /index.php 342 $redirect['path'] = preg_replace('|/' . preg_quote( $wp_rewrite->index, '|' ) . '/*?$|', '/', $redirect['path']); 343 344 // Remove trailing spaces from the path 345 $redirect['path'] = preg_replace( '#(%20| )+$#', '', $redirect['path'] ); 346 347 if ( !empty( $redirect['query'] ) ) { 348 // Remove trailing spaces from certain terminating query string args 349 $redirect['query'] = preg_replace( '#((p|page_id|cat|tag)=[^&]*?)(%20| )+$#', '$1', $redirect['query'] ); 350 351 // Clean up empty query strings 352 $redirect['query'] = trim(preg_replace( '#(^|&)(p|page_id|cat|tag)=?(&|$)#', '&', $redirect['query']), '&'); 353 354 // Redirect obsolete feeds 355 $redirect['query'] = preg_replace( '#(^|&)feed=rss(&|$)#', '$1feed=rss2$2', $redirect['query'] ); 356 357 // Remove redundant leading ampersands 358 $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); 359 } 360 361 // strip /index.php/ when we're not using PATHINFO permalinks 362 if ( !$wp_rewrite->using_index_permalinks() ) 363 $redirect['path'] = str_replace( '/' . $wp_rewrite->index . '/', '/', $redirect['path'] ); 364 365 // trailing slashes 366 if ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() && !is_404() && (!is_front_page() || ( is_front_page() && (get_query_var('paged') > 1) ) ) ) { 367 $user_ts_type = ''; 368 if ( get_query_var('paged') > 0 ) { 369 $user_ts_type = 'paged'; 370 } else { 371 foreach ( array('single', 'category', 'page', 'day', 'month', 'year', 'home') as $type ) { 372 $func = 'is_' . $type; 373 if ( call_user_func($func) ) { 374 $user_ts_type = $type; 375 break; 376 } 377 } 378 } 379 $redirect['path'] = user_trailingslashit($redirect['path'], $user_ts_type); 380 } elseif ( is_front_page() ) { 381 $redirect['path'] = trailingslashit($redirect['path']); 382 } 383 384 // Strip multiple slashes out of the URL 385 if ( strpos($redirect['path'], '//') > -1 ) 386 $redirect['path'] = preg_replace('|/+|', '/', $redirect['path']); 387 388 // Always trailing slash the Front Page URL 389 if ( trailingslashit( $redirect['path'] ) == trailingslashit( $user_home['path'] ) ) 390 $redirect['path'] = trailingslashit($redirect['path']); 391 392 // Ignore differences in host capitalization, as this can lead to infinite redirects 393 // Only redirect no-www <=> yes-www 394 if ( strtolower($original['host']) == strtolower($redirect['host']) || 395 ( strtolower($original['host']) != 'www.' . strtolower($redirect['host']) && 'www.' . strtolower($original['host']) != strtolower($redirect['host']) ) ) 396 $redirect['host'] = $original['host']; 397 398 $compare_original = array($original['host'], $original['path']); 399 400 if ( !empty( $original['port'] ) ) 401 $compare_original[] = $original['port']; 402 403 if ( !empty( $original['query'] ) ) 404 $compare_original[] = $original['query']; 405 406 $compare_redirect = array($redirect['host'], $redirect['path']); 407 408 if ( !empty( $redirect['port'] ) ) 409 $compare_redirect[] = $redirect['port']; 410 411 if ( !empty( $redirect['query'] ) ) 412 $compare_redirect[] = $redirect['query']; 413 414 if ( $compare_original !== $compare_redirect ) { 415 $redirect_url = $redirect['scheme'] . '://' . $redirect['host']; 416 if ( !empty($redirect['port']) ) 417 $redirect_url .= ':' . $redirect['port']; 418 $redirect_url .= $redirect['path']; 419 if ( !empty($redirect['query']) ) 420 $redirect_url .= '?' . $redirect['query']; 421 } 422 423 if ( !$redirect_url || $redirect_url == $requested_url ) 424 return false; 425 426 // Hex encoded octets are case-insensitive. 427 if ( false !== strpos($requested_url, '%') ) { 428 if ( !function_exists('lowercase_octets') ) { 429 function lowercase_octets($matches) { 430 return strtolower( $matches[0] ); 431 } 432 } 433 $requested_url = preg_replace_callback('|%[a-fA-F0-9][a-fA-F0-9]|', 'lowercase_octets', $requested_url); 434 } 435 436 /** 437 * Filter the canonical redirect URL. 438 * 439 * Returning false to this filter will cancel the redirect. 440 * 441 * @since 2.3.0 442 * 443 * @param string $redirect_url The redirect URL. 444 * @param string $requested_url The requested URL. 445 */ 446 $redirect_url = apply_filters( 'redirect_canonical', $redirect_url, $requested_url ); 447 448 if ( !$redirect_url || $redirect_url == $requested_url ) // yes, again -- in case the filter aborted the request 449 return false; 450 451 if ( $do_redirect ) { 452 // protect against chained redirects 453 if ( !redirect_canonical($redirect_url, false) ) { 454 wp_redirect($redirect_url, 301); 455 exit(); 456 } else { 457 // Debug 458 // die("1: $redirect_url<br />2: " . redirect_canonical( $redirect_url, false ) ); 459 return false; 460 } 461 } else { 462 return $redirect_url; 463 } 464 } 465 466 /** 467 * Removes arguments from a query string if they are not present in a URL 468 * DO NOT use this in plugin code. 469 * 470 * @since 3.4 471 * @access private 472 * 473 * @return string The altered query string 474 */ 475 function _remove_qs_args_if_not_in_url( $query_string, Array $args_to_check, $url ) { 476 $parsed_url = @parse_url( $url ); 477 if ( ! empty( $parsed_url['query'] ) ) { 478 parse_str( $parsed_url['query'], $parsed_query ); 479 foreach ( $args_to_check as $qv ) { 480 if ( !isset( $parsed_query[$qv] ) ) 481 $query_string = remove_query_arg( $qv, $query_string ); 482 } 483 } else { 484 $query_string = remove_query_arg( $args_to_check, $query_string ); 485 } 486 return $query_string; 487 } 488 489 /** 490 * Attempts to guess the correct URL based on query vars 491 * 492 * @since 2.3.0 493 * @uses $wpdb 494 * 495 * @return bool|string The correct URL if one is found. False on failure. 496 */ 497 function redirect_guess_404_permalink() { 498 global $wpdb, $wp_rewrite; 499 500 if ( get_query_var('name') ) { 501 $where = $wpdb->prepare("post_name LIKE %s", like_escape( get_query_var('name') ) . '%'); 502 503 // if any of post_type, year, monthnum, or day are set, use them to refine the query 504 if ( get_query_var('post_type') ) 505 $where .= $wpdb->prepare(" AND post_type = %s", get_query_var('post_type')); 506 else 507 $where .= " AND post_type IN ('" . implode( "', '", get_post_types( array( 'public' => true ) ) ) . "')"; 508 509 if ( get_query_var('year') ) 510 $where .= $wpdb->prepare(" AND YEAR(post_date) = %d", get_query_var('year')); 511 if ( get_query_var('monthnum') ) 512 $where .= $wpdb->prepare(" AND MONTH(post_date) = %d", get_query_var('monthnum')); 513 if ( get_query_var('day') ) 514 $where .= $wpdb->prepare(" AND DAYOFMONTH(post_date) = %d", get_query_var('day')); 515 516 $post_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE $where AND post_status = 'publish'"); 517 if ( ! $post_id ) 518 return false; 519 if ( get_query_var( 'feed' ) ) 520 return get_post_comments_feed_link( $post_id, get_query_var( 'feed' ) ); 521 elseif ( get_query_var( 'page' ) ) 522 return trailingslashit( get_permalink( $post_id ) ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' ); 523 else 524 return get_permalink( $post_id ); 525 } 526 527 return false; 528 } 529 530 add_action('template_redirect', 'redirect_canonical'); 531 532 function wp_redirect_admin_locations() { 533 global $wp_rewrite; 534 if ( ! ( is_404() && $wp_rewrite->using_permalinks() ) ) 535 return; 536 537 $admins = array( 538 home_url( 'wp-admin', 'relative' ), 539 home_url( 'dashboard', 'relative' ), 540 home_url( 'admin', 'relative' ), 541 site_url( 'dashboard', 'relative' ), 542 site_url( 'admin', 'relative' ), 543 ); 544 if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $admins ) ) { 545 wp_redirect( admin_url() ); 546 exit; 547 } 548 549 $logins = array( 550 home_url( 'wp-login.php', 'relative' ), 551 home_url( 'login', 'relative' ), 552 site_url( 'login', 'relative' ), 553 ); 554 if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $logins ) ) { 555 wp_redirect( site_url( 'wp-login.php', 'login' ) ); 556 exit; 557 } 558 } 559 560 add_action( 'template_redirect', 'wp_redirect_admin_locations', 1000 );
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| Generated: Tue Mar 25 01:41:18 2014 | WordPress honlapkészítés: online1.hu |