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PHP Cross Reference of WordPress Trunk (Updated Daily) |
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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, 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 * 31 * @global WP_Rewrite $wp_rewrite 32 * @global bool $is_IIS 33 * @global WP_Query $wp_query 34 * @global wpdb $wpdb WordPress database abstraction object. 35 * @global WP $wp Current WordPress environment instance. 36 * 37 * @param string $requested_url Optional. The URL that was requested, used to 38 * figure if redirect is needed. 39 * @param bool $do_redirect Optional. Redirect to the new URL. 40 * @return string|void The string of the URL, if redirect needed. 41 */ 42 function redirect_canonical( $requested_url = null, $do_redirect = true ) { 43 global $wp_rewrite, $is_IIS, $wp_query, $wpdb, $wp; 44 45 if ( isset( $_SERVER['REQUEST_METHOD'] ) && ! in_array( strtoupper( $_SERVER['REQUEST_METHOD'] ), array( 'GET', 'HEAD' ) ) ) { 46 return; 47 } 48 49 // If we're not in wp-admin and the post has been published and preview nonce 50 // is non-existent or invalid then no need for preview in query 51 if ( is_preview() && get_query_var( 'p' ) && 'publish' == get_post_status( get_query_var( 'p' ) ) ) { 52 if ( ! isset( $_GET['preview_id'] ) 53 || ! isset( $_GET['preview_nonce'] ) 54 || ! wp_verify_nonce( $_GET['preview_nonce'], 'post_preview_' . (int) $_GET['preview_id'] ) ) { 55 $wp_query->is_preview = false; 56 } 57 } 58 59 if ( is_trackback() || is_search() || is_admin() || is_preview() || is_robots() || ( $is_IIS && ! iis7_supports_permalinks() ) ) { 60 return; 61 } 62 63 if ( ! $requested_url && isset( $_SERVER['HTTP_HOST'] ) ) { 64 // build the URL in the address bar 65 $requested_url = is_ssl() ? 'https://' : 'http://'; 66 $requested_url .= $_SERVER['HTTP_HOST']; 67 $requested_url .= $_SERVER['REQUEST_URI']; 68 } 69 70 $original = @parse_url( $requested_url ); 71 if ( false === $original ) { 72 return; 73 } 74 75 $redirect = $original; 76 $redirect_url = false; 77 78 // Notice fixing 79 if ( ! isset( $redirect['path'] ) ) { 80 $redirect['path'] = ''; 81 } 82 if ( ! isset( $redirect['query'] ) ) { 83 $redirect['query'] = ''; 84 } 85 86 // If the original URL ended with non-breaking spaces, they were almost 87 // certainly inserted by accident. Let's remove them, so the reader doesn't 88 // see a 404 error with no obvious cause. 89 $redirect['path'] = preg_replace( '|(%C2%A0)+$|i', '', $redirect['path'] ); 90 91 // It's not a preview, so remove it from URL 92 if ( get_query_var( 'preview' ) ) { 93 $redirect['query'] = remove_query_arg( 'preview', $redirect['query'] ); 94 } 95 96 if ( is_feed() && ( $id = get_query_var( 'p' ) ) ) { 97 if ( $redirect_url = get_post_comments_feed_link( $id, get_query_var( 'feed' ) ) ) { 98 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type', 'feed' ), $redirect_url ); 99 $redirect['path'] = parse_url( $redirect_url, PHP_URL_PATH ); 100 } 101 } 102 103 if ( is_singular() && 1 > $wp_query->post_count && ( $id = get_query_var( 'p' ) ) ) { 104 105 $vars = $wpdb->get_results( $wpdb->prepare( "SELECT post_type, post_parent FROM $wpdb->posts WHERE ID = %d", $id ) ); 106 107 if ( isset( $vars[0] ) && $vars = $vars[0] ) { 108 if ( 'revision' == $vars->post_type && $vars->post_parent > 0 ) { 109 $id = $vars->post_parent; 110 } 111 112 if ( $redirect_url = get_permalink( $id ) ) { 113 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); 114 } 115 } 116 } 117 118 // These tests give us a WP-generated permalink 119 if ( is_404() ) { 120 121 // Redirect ?page_id, ?p=, ?attachment_id= to their respective url's 122 $id = max( get_query_var( 'p' ), get_query_var( 'page_id' ), get_query_var( 'attachment_id' ) ); 123 if ( $id && $redirect_post = get_post( $id ) ) { 124 $post_type_obj = get_post_type_object( $redirect_post->post_type ); 125 if ( $post_type_obj->public && 'auto-draft' != $redirect_post->post_status ) { 126 $redirect_url = get_permalink( $redirect_post ); 127 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); 128 } 129 } 130 131 if ( get_query_var( 'day' ) && get_query_var( 'monthnum' ) && get_query_var( 'year' ) ) { 132 $year = get_query_var( 'year' ); 133 $month = get_query_var( 'monthnum' ); 134 $day = get_query_var( 'day' ); 135 $date = sprintf( '%04d-%02d-%02d', $year, $month, $day ); 136 if ( ! wp_checkdate( $month, $day, $year, $date ) ) { 137 $redirect_url = get_month_link( $year, $month ); 138 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'year', 'monthnum', 'day' ), $redirect_url ); 139 } 140 } elseif ( get_query_var( 'monthnum' ) && get_query_var( 'year' ) && 12 < get_query_var( 'monthnum' ) ) { 141 $redirect_url = get_year_link( get_query_var( 'year' ) ); 142 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'year', 'monthnum' ), $redirect_url ); 143 } 144 145 if ( ! $redirect_url ) { 146 if ( $redirect_url = redirect_guess_404_permalink() ) { 147 $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 ); 148 } 149 } 150 151 if ( get_query_var( 'page' ) && $wp_query->post && 152 false !== strpos( $wp_query->post->post_content, '<!--nextpage-->' ) ) { 153 $redirect['path'] = rtrim( $redirect['path'], (int) get_query_var( 'page' ) . '/' ); 154 $redirect['query'] = remove_query_arg( 'page', $redirect['query'] ); 155 $redirect_url = get_permalink( $wp_query->post->ID ); 156 } 157 } elseif ( is_object( $wp_rewrite ) && $wp_rewrite->using_permalinks() ) { 158 // rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101 159 if ( is_attachment() && 160 ! array_diff( array_keys( $wp->query_vars ), array( 'attachment', 'attachment_id' ) ) && 161 ! $redirect_url ) { 162 if ( ! empty( $_GET['attachment_id'] ) ) { 163 $redirect_url = get_attachment_link( get_query_var( 'attachment_id' ) ); 164 if ( $redirect_url ) { 165 $redirect['query'] = remove_query_arg( 'attachment_id', $redirect['query'] ); 166 } 167 } else { 168 $redirect_url = get_attachment_link(); 169 } 170 } elseif ( is_single() && ! empty( $_GET['p'] ) && ! $redirect_url ) { 171 if ( $redirect_url = get_permalink( get_query_var( 'p' ) ) ) { 172 $redirect['query'] = remove_query_arg( array( 'p', 'post_type' ), $redirect['query'] ); 173 } 174 } elseif ( is_single() && ! empty( $_GET['name'] ) && ! $redirect_url ) { 175 if ( $redirect_url = get_permalink( $wp_query->get_queried_object_id() ) ) { 176 $redirect['query'] = remove_query_arg( 'name', $redirect['query'] ); 177 } 178 } elseif ( is_page() && ! empty( $_GET['page_id'] ) && ! $redirect_url ) { 179 if ( $redirect_url = get_permalink( get_query_var( 'page_id' ) ) ) { 180 $redirect['query'] = remove_query_arg( 'page_id', $redirect['query'] ); 181 } 182 } elseif ( is_page() && ! is_feed() && 'page' == get_option( 'show_on_front' ) && get_queried_object_id() == get_option( 'page_on_front' ) && ! $redirect_url ) { 183 $redirect_url = home_url( '/' ); 184 } 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 ) { 185 if ( $redirect_url = get_permalink( get_option( 'page_for_posts' ) ) ) { 186 $redirect['query'] = remove_query_arg( 'page_id', $redirect['query'] ); 187 } 188 } elseif ( ! empty( $_GET['m'] ) && ( is_year() || is_month() || is_day() ) ) { 189 $m = get_query_var( 'm' ); 190 switch ( strlen( $m ) ) { 191 case 4: // Yearly 192 $redirect_url = get_year_link( $m ); 193 break; 194 case 6: // Monthly 195 $redirect_url = get_month_link( substr( $m, 0, 4 ), substr( $m, 4, 2 ) ); 196 break; 197 case 8: // Daily 198 $redirect_url = get_day_link( substr( $m, 0, 4 ), substr( $m, 4, 2 ), substr( $m, 6, 2 ) ); 199 break; 200 } 201 if ( $redirect_url ) { 202 $redirect['query'] = remove_query_arg( 'm', $redirect['query'] ); 203 } 204 // now moving on to non ?m=X year/month/day links 205 } elseif ( is_day() && get_query_var( 'year' ) && get_query_var( 'monthnum' ) && ! empty( $_GET['day'] ) ) { 206 if ( $redirect_url = get_day_link( get_query_var( 'year' ), get_query_var( 'monthnum' ), get_query_var( 'day' ) ) ) { 207 $redirect['query'] = remove_query_arg( array( 'year', 'monthnum', 'day' ), $redirect['query'] ); 208 } 209 } elseif ( is_month() && get_query_var( 'year' ) && ! empty( $_GET['monthnum'] ) ) { 210 if ( $redirect_url = get_month_link( get_query_var( 'year' ), get_query_var( 'monthnum' ) ) ) { 211 $redirect['query'] = remove_query_arg( array( 'year', 'monthnum' ), $redirect['query'] ); 212 } 213 } elseif ( is_year() && ! empty( $_GET['year'] ) ) { 214 if ( $redirect_url = get_year_link( get_query_var( 'year' ) ) ) { 215 $redirect['query'] = remove_query_arg( 'year', $redirect['query'] ); 216 } 217 } elseif ( is_author() && ! empty( $_GET['author'] ) && preg_match( '|^[0-9]+$|', $_GET['author'] ) ) { 218 $author = get_userdata( get_query_var( 'author' ) ); 219 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 ) ) ) { 220 if ( $redirect_url = get_author_posts_url( $author->ID, $author->user_nicename ) ) { 221 $redirect['query'] = remove_query_arg( 'author', $redirect['query'] ); 222 } 223 } 224 } elseif ( is_category() || is_tag() || is_tax() ) { // Terms (Tags/categories) 225 226 $term_count = 0; 227 foreach ( $wp_query->tax_query->queried_terms as $tax_query ) { 228 $term_count += count( $tax_query['terms'] ); 229 } 230 231 $obj = $wp_query->get_queried_object(); 232 if ( $term_count <= 1 && ! empty( $obj->term_id ) && ( $tax_url = get_term_link( (int) $obj->term_id, $obj->taxonomy ) ) && ! is_wp_error( $tax_url ) ) { 233 if ( ! empty( $redirect['query'] ) ) { 234 // Strip taxonomy query vars off the url. 235 $qv_remove = array( 'term', 'taxonomy' ); 236 if ( is_category() ) { 237 $qv_remove[] = 'category_name'; 238 $qv_remove[] = 'cat'; 239 } elseif ( is_tag() ) { 240 $qv_remove[] = 'tag'; 241 $qv_remove[] = 'tag_id'; 242 } else { // Custom taxonomies will have a custom query var, remove those too: 243 $tax_obj = get_taxonomy( $obj->taxonomy ); 244 if ( false !== $tax_obj->query_var ) { 245 $qv_remove[] = $tax_obj->query_var; 246 } 247 } 248 249 $rewrite_vars = array_diff( array_keys( $wp_query->query ), array_keys( $_GET ) ); 250 251 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 252 $redirect['query'] = remove_query_arg( $qv_remove, $redirect['query'] ); //Remove all of the per-tax qv's 253 254 // Create the destination url for this taxonomy 255 $tax_url = parse_url( $tax_url ); 256 if ( ! empty( $tax_url['query'] ) ) { // Taxonomy accessible via ?taxonomy=..&term=.. or any custom qv.. 257 parse_str( $tax_url['query'], $query_vars ); 258 $redirect['query'] = add_query_arg( $query_vars, $redirect['query'] ); 259 } else { // Taxonomy is accessible via a "pretty-URL" 260 $redirect['path'] = $tax_url['path']; 261 } 262 } else { // Some query vars are set via $_GET. Unset those from $_GET that exist via the rewrite 263 foreach ( $qv_remove as $_qv ) { 264 if ( isset( $rewrite_vars[ $_qv ] ) ) { 265 $redirect['query'] = remove_query_arg( $_qv, $redirect['query'] ); 266 } 267 } 268 } 269 } 270 } 271 } elseif ( is_single() && strpos( $wp_rewrite->permalink_structure, '%category%' ) !== false && $cat = get_query_var( 'category_name' ) ) { 272 $category = get_category_by_path( $cat ); 273 if ( ( ! $category || is_wp_error( $category ) ) || ! has_term( $category->term_id, 'category', $wp_query->get_queried_object_id() ) ) { 274 $redirect_url = get_permalink( $wp_query->get_queried_object_id() ); 275 } 276 } 277 278 // Post Paging 279 if ( is_singular() && get_query_var( 'page' ) ) { 280 if ( ! $redirect_url ) { 281 $redirect_url = get_permalink( get_queried_object_id() ); 282 } 283 284 $page = get_query_var( 'page' ); 285 if ( $page > 1 ) { 286 if ( is_front_page() ) { 287 $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( "$wp_rewrite->pagination_base/$page", 'paged' ); 288 } else { 289 $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( $page, 'single_paged' ); 290 } 291 } 292 $redirect['query'] = remove_query_arg( 'page', $redirect['query'] ); 293 } 294 295 // paging and feeds 296 if ( get_query_var( 'paged' ) || is_feed() || get_query_var( 'cpage' ) ) { 297 while ( preg_match( "#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", $redirect['path'] ) || preg_match( '#/(comments/?)?(feed|rss|rdf|atom|rss2)(/+)?$#', $redirect['path'] ) || preg_match( "#/{$wp_rewrite->comments_pagination_base}-[0-9]+(/+)?$#", $redirect['path'] ) ) { 298 // Strip off paging and feed 299 $redirect['path'] = preg_replace( "#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", '/', $redirect['path'] ); // strip off any existing paging 300 $redirect['path'] = preg_replace( '#/(comments/?)?(feed|rss2?|rdf|atom)(/+|$)#', '/', $redirect['path'] ); // strip off feed endings 301 $redirect['path'] = preg_replace( "#/{$wp_rewrite->comments_pagination_base}-[0-9]+?(/+)?$#", '/', $redirect['path'] ); // strip off any existing comment paging 302 } 303 304 $addl_path = ''; 305 if ( is_feed() && in_array( get_query_var( 'feed' ), $wp_rewrite->feeds ) ) { 306 $addl_path = ! empty( $addl_path ) ? trailingslashit( $addl_path ) : ''; 307 if ( ! is_singular() && get_query_var( 'withcomments' ) ) { 308 $addl_path .= 'comments/'; 309 } 310 if ( ( 'rss' == get_default_feed() && 'feed' == get_query_var( 'feed' ) ) || 'rss' == get_query_var( 'feed' ) ) { 311 $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == 'rss2' ) ? '' : 'rss2' ), 'feed' ); 312 } else { 313 $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == get_query_var( 'feed' ) || 'feed' == get_query_var( 'feed' ) ) ? '' : get_query_var( 'feed' ) ), 'feed' ); 314 } 315 $redirect['query'] = remove_query_arg( 'feed', $redirect['query'] ); 316 } elseif ( is_feed() && 'old' == get_query_var( 'feed' ) ) { 317 $old_feed_files = array( 318 'wp-atom.php' => 'atom', 319 'wp-commentsrss2.php' => 'comments_rss2', 320 'wp-feed.php' => get_default_feed(), 321 'wp-rdf.php' => 'rdf', 322 'wp-rss.php' => 'rss2', 323 'wp-rss2.php' => 'rss2', 324 ); 325 if ( isset( $old_feed_files[ basename( $redirect['path'] ) ] ) ) { 326 $redirect_url = get_feed_link( $old_feed_files[ basename( $redirect['path'] ) ] ); 327 wp_redirect( $redirect_url, 301 ); 328 die(); 329 } 330 } 331 332 if ( get_query_var( 'paged' ) > 0 ) { 333 $paged = get_query_var( 'paged' ); 334 $redirect['query'] = remove_query_arg( 'paged', $redirect['query'] ); 335 if ( ! is_feed() ) { 336 if ( $paged > 1 && ! is_single() ) { 337 $addl_path = ( ! empty( $addl_path ) ? trailingslashit( $addl_path ) : '' ) . user_trailingslashit( "$wp_rewrite->pagination_base/$paged", 'paged' ); 338 } elseif ( ! is_single() ) { 339 $addl_path = ! empty( $addl_path ) ? trailingslashit( $addl_path ) : ''; 340 } 341 } elseif ( $paged > 1 ) { 342 $redirect['query'] = add_query_arg( 'paged', $paged, $redirect['query'] ); 343 } 344 } 345 346 if ( get_option( 'page_comments' ) && ( 347 ( 'newest' == get_option( 'default_comments_page' ) && get_query_var( 'cpage' ) > 0 ) || 348 ( 'newest' != get_option( 'default_comments_page' ) && get_query_var( 'cpage' ) > 1 ) 349 ) ) { 350 $addl_path = ( ! empty( $addl_path ) ? trailingslashit( $addl_path ) : '' ) . user_trailingslashit( $wp_rewrite->comments_pagination_base . '-' . get_query_var( 'cpage' ), 'commentpaged' ); 351 $redirect['query'] = remove_query_arg( 'cpage', $redirect['query'] ); 352 } 353 354 $redirect['path'] = user_trailingslashit( preg_replace( '|/' . preg_quote( $wp_rewrite->index, '|' ) . '/?$|', '/', $redirect['path'] ) ); // strip off trailing /index.php/ 355 if ( ! empty( $addl_path ) && $wp_rewrite->using_index_permalinks() && strpos( $redirect['path'], '/' . $wp_rewrite->index . '/' ) === false ) { 356 $redirect['path'] = trailingslashit( $redirect['path'] ) . $wp_rewrite->index . '/'; 357 } 358 if ( ! empty( $addl_path ) ) { 359 $redirect['path'] = trailingslashit( $redirect['path'] ) . $addl_path; 360 } 361 $redirect_url = $redirect['scheme'] . '://' . $redirect['host'] . $redirect['path']; 362 } 363 364 if ( 'wp-register.php' == basename( $redirect['path'] ) ) { 365 if ( is_multisite() ) { 366 /** This filter is documented in wp-login.php */ 367 $redirect_url = apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) ); 368 } else { 369 $redirect_url = wp_registration_url(); 370 } 371 372 wp_redirect( $redirect_url, 301 ); 373 die(); 374 } 375 } 376 377 // tack on any additional query vars 378 $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); 379 if ( $redirect_url && ! empty( $redirect['query'] ) ) { 380 parse_str( $redirect['query'], $_parsed_query ); 381 $redirect = @parse_url( $redirect_url ); 382 383 if ( ! empty( $_parsed_query['name'] ) && ! empty( $redirect['query'] ) ) { 384 parse_str( $redirect['query'], $_parsed_redirect_query ); 385 386 if ( empty( $_parsed_redirect_query['name'] ) ) { 387 unset( $_parsed_query['name'] ); 388 } 389 } 390 391 $_parsed_query = array_combine( 392 rawurlencode_deep( array_keys( $_parsed_query ) ), 393 rawurlencode_deep( array_values( $_parsed_query ) ) 394 ); 395 $redirect_url = add_query_arg( $_parsed_query, $redirect_url ); 396 } 397 398 if ( $redirect_url ) { 399 $redirect = @parse_url( $redirect_url ); 400 } 401 402 // www.example.com vs example.com 403 $user_home = @parse_url( home_url() ); 404 if ( ! empty( $user_home['host'] ) ) { 405 $redirect['host'] = $user_home['host']; 406 } 407 if ( empty( $user_home['path'] ) ) { 408 $user_home['path'] = '/'; 409 } 410 411 // Handle ports 412 if ( ! empty( $user_home['port'] ) ) { 413 $redirect['port'] = $user_home['port']; 414 } else { 415 unset( $redirect['port'] ); 416 } 417 418 // trailing /index.php 419 $redirect['path'] = preg_replace( '|/' . preg_quote( $wp_rewrite->index, '|' ) . '/*?$|', '/', $redirect['path'] ); 420 421 $punctuation_pattern = implode( 422 '|', 423 array_map( 424 'preg_quote', 425 array( 426 ' ', 427 '%20', // space 428 '!', 429 '%21', // exclamation mark 430 '"', 431 '%22', // double quote 432 "'", 433 '%27', // single quote 434 '(', 435 '%28', // opening bracket 436 ')', 437 '%29', // closing bracket 438 ',', 439 '%2C', // comma 440 '.', 441 '%2E', // period 442 ';', 443 '%3B', // semicolon 444 '{', 445 '%7B', // opening curly bracket 446 '}', 447 '%7D', // closing curly bracket 448 '%E2%80%9C', // opening curly quote 449 '%E2%80%9D', // closing curly quote 450 ) 451 ) 452 ); 453 454 // Remove trailing spaces and end punctuation from the path. 455 $redirect['path'] = preg_replace( "#($punctuation_pattern)+$#", '', $redirect['path'] ); 456 457 if ( ! empty( $redirect['query'] ) ) { 458 // Remove trailing spaces and end punctuation from certain terminating query string args. 459 $redirect['query'] = preg_replace( "#((p|page_id|cat|tag)=[^&]*?)($punctuation_pattern)+$#", '$1', $redirect['query'] ); 460 461 // Clean up empty query strings 462 $redirect['query'] = trim( preg_replace( '#(^|&)(p|page_id|cat|tag)=?(&|$)#', '&', $redirect['query'] ), '&' ); 463 464 // Redirect obsolete feeds 465 $redirect['query'] = preg_replace( '#(^|&)feed=rss(&|$)#', '$1feed=rss2$2', $redirect['query'] ); 466 467 // Remove redundant leading ampersands 468 $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); 469 } 470 471 // strip /index.php/ when we're not using PATHINFO permalinks 472 if ( ! $wp_rewrite->using_index_permalinks() ) { 473 $redirect['path'] = str_replace( '/' . $wp_rewrite->index . '/', '/', $redirect['path'] ); 474 } 475 476 // trailing slashes 477 if ( is_object( $wp_rewrite ) && $wp_rewrite->using_permalinks() && ! is_404() && ( ! is_front_page() || ( is_front_page() && ( get_query_var( 'paged' ) > 1 ) ) ) ) { 478 $user_ts_type = ''; 479 if ( get_query_var( 'paged' ) > 0 ) { 480 $user_ts_type = 'paged'; 481 } else { 482 foreach ( array( 'single', 'category', 'page', 'day', 'month', 'year', 'home' ) as $type ) { 483 $func = 'is_' . $type; 484 if ( call_user_func( $func ) ) { 485 $user_ts_type = $type; 486 break; 487 } 488 } 489 } 490 $redirect['path'] = user_trailingslashit( $redirect['path'], $user_ts_type ); 491 } elseif ( is_front_page() ) { 492 $redirect['path'] = trailingslashit( $redirect['path'] ); 493 } 494 495 // Strip multiple slashes out of the URL 496 if ( strpos( $redirect['path'], '//' ) > -1 ) { 497 $redirect['path'] = preg_replace( '|/+|', '/', $redirect['path'] ); 498 } 499 500 // Always trailing slash the Front Page URL 501 if ( trailingslashit( $redirect['path'] ) == trailingslashit( $user_home['path'] ) ) { 502 $redirect['path'] = trailingslashit( $redirect['path'] ); 503 } 504 505 // Ignore differences in host capitalization, as this can lead to infinite redirects 506 // Only redirect no-www <=> yes-www 507 if ( strtolower( $original['host'] ) == strtolower( $redirect['host'] ) || 508 ( strtolower( $original['host'] ) != 'www.' . strtolower( $redirect['host'] ) && 'www.' . strtolower( $original['host'] ) != strtolower( $redirect['host'] ) ) ) { 509 $redirect['host'] = $original['host']; 510 } 511 512 $compare_original = array( $original['host'], $original['path'] ); 513 514 if ( ! empty( $original['port'] ) ) { 515 $compare_original[] = $original['port']; 516 } 517 518 if ( ! empty( $original['query'] ) ) { 519 $compare_original[] = $original['query']; 520 } 521 522 $compare_redirect = array( $redirect['host'], $redirect['path'] ); 523 524 if ( ! empty( $redirect['port'] ) ) { 525 $compare_redirect[] = $redirect['port']; 526 } 527 528 if ( ! empty( $redirect['query'] ) ) { 529 $compare_redirect[] = $redirect['query']; 530 } 531 532 if ( $compare_original !== $compare_redirect ) { 533 $redirect_url = $redirect['scheme'] . '://' . $redirect['host']; 534 if ( ! empty( $redirect['port'] ) ) { 535 $redirect_url .= ':' . $redirect['port']; 536 } 537 $redirect_url .= $redirect['path']; 538 if ( ! empty( $redirect['query'] ) ) { 539 $redirect_url .= '?' . $redirect['query']; 540 } 541 } 542 543 if ( ! $redirect_url || $redirect_url == $requested_url ) { 544 return; 545 } 546 547 // Hex encoded octets are case-insensitive. 548 if ( false !== strpos( $requested_url, '%' ) ) { 549 if ( ! function_exists( 'lowercase_octets' ) ) { 550 /** 551 * Converts the first hex-encoded octet match to lowercase. 552 * 553 * @since 3.1.0 554 * @ignore 555 * 556 * @param array $matches Hex-encoded octet matches for the requested URL. 557 * @return string Lowercased version of the first match. 558 */ 559 function lowercase_octets( $matches ) { 560 return strtolower( $matches[0] ); 561 } 562 } 563 $requested_url = preg_replace_callback( '|%[a-fA-F0-9][a-fA-F0-9]|', 'lowercase_octets', $requested_url ); 564 } 565 566 /** 567 * Filters the canonical redirect URL. 568 * 569 * Returning false to this filter will cancel the redirect. 570 * 571 * @since 2.3.0 572 * 573 * @param string $redirect_url The redirect URL. 574 * @param string $requested_url The requested URL. 575 */ 576 $redirect_url = apply_filters( 'redirect_canonical', $redirect_url, $requested_url ); 577 578 // yes, again -- in case the filter aborted the request 579 if ( ! $redirect_url || strip_fragment_from_url( $redirect_url ) == strip_fragment_from_url( $requested_url ) ) { 580 return; 581 } 582 583 if ( $do_redirect ) { 584 // protect against chained redirects 585 if ( ! redirect_canonical( $redirect_url, false ) ) { 586 wp_redirect( $redirect_url, 301 ); 587 exit(); 588 } else { 589 // Debug 590 // die("1: $redirect_url<br />2: " . redirect_canonical( $redirect_url, false ) ); 591 return; 592 } 593 } else { 594 return $redirect_url; 595 } 596 } 597 598 /** 599 * Removes arguments from a query string if they are not present in a URL 600 * DO NOT use this in plugin code. 601 * 602 * @since 3.4.0 603 * @access private 604 * 605 * @param string $query_string 606 * @param array $args_to_check 607 * @param string $url 608 * @return string The altered query string 609 */ 610 function _remove_qs_args_if_not_in_url( $query_string, array $args_to_check, $url ) { 611 $parsed_url = @parse_url( $url ); 612 if ( ! empty( $parsed_url['query'] ) ) { 613 parse_str( $parsed_url['query'], $parsed_query ); 614 foreach ( $args_to_check as $qv ) { 615 if ( ! isset( $parsed_query[ $qv ] ) ) { 616 $query_string = remove_query_arg( $qv, $query_string ); 617 } 618 } 619 } else { 620 $query_string = remove_query_arg( $args_to_check, $query_string ); 621 } 622 return $query_string; 623 } 624 625 /** 626 * Strips the #fragment from a URL, if one is present. 627 * 628 * @since 4.4.0 629 * 630 * @param string $url The URL to strip. 631 * @return string The altered URL. 632 */ 633 function strip_fragment_from_url( $url ) { 634 $parsed_url = @parse_url( $url ); 635 if ( ! empty( $parsed_url['host'] ) ) { 636 // This mirrors code in redirect_canonical(). It does not handle every case. 637 $url = $parsed_url['scheme'] . '://' . $parsed_url['host']; 638 if ( ! empty( $parsed_url['port'] ) ) { 639 $url .= ':' . $parsed_url['port']; 640 } 641 642 if ( ! empty( $parsed_url['path'] ) ) { 643 $url .= $parsed_url['path']; 644 } 645 646 if ( ! empty( $parsed_url['query'] ) ) { 647 $url .= '?' . $parsed_url['query']; 648 } 649 } 650 651 return $url; 652 } 653 654 /** 655 * Attempts to guess the correct URL based on query vars 656 * 657 * @since 2.3.0 658 * 659 * @global wpdb $wpdb WordPress database abstraction object. 660 * 661 * @return false|string The correct URL if one is found. False on failure. 662 */ 663 function redirect_guess_404_permalink() { 664 global $wpdb; 665 666 if ( get_query_var( 'name' ) ) { 667 $where = $wpdb->prepare( 'post_name LIKE %s', $wpdb->esc_like( get_query_var( 'name' ) ) . '%' ); 668 669 // if any of post_type, year, monthnum, or day are set, use them to refine the query 670 if ( get_query_var( 'post_type' ) ) { 671 $where .= $wpdb->prepare( ' AND post_type = %s', get_query_var( 'post_type' ) ); 672 } else { 673 $where .= " AND post_type IN ('" . implode( "', '", get_post_types( array( 'public' => true ) ) ) . "')"; 674 } 675 676 if ( get_query_var( 'year' ) ) { 677 $where .= $wpdb->prepare( ' AND YEAR(post_date) = %d', get_query_var( 'year' ) ); 678 } 679 if ( get_query_var( 'monthnum' ) ) { 680 $where .= $wpdb->prepare( ' AND MONTH(post_date) = %d', get_query_var( 'monthnum' ) ); 681 } 682 if ( get_query_var( 'day' ) ) { 683 $where .= $wpdb->prepare( ' AND DAYOFMONTH(post_date) = %d', get_query_var( 'day' ) ); 684 } 685 686 $post_id = $wpdb->get_var( "SELECT ID FROM $wpdb->posts WHERE $where AND post_status = 'publish'" ); 687 if ( ! $post_id ) { 688 return false; 689 } 690 if ( get_query_var( 'feed' ) ) { 691 return get_post_comments_feed_link( $post_id, get_query_var( 'feed' ) ); 692 } elseif ( get_query_var( 'page' ) && 1 < get_query_var( 'page' ) ) { 693 return trailingslashit( get_permalink( $post_id ) ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' ); 694 } else { 695 return get_permalink( $post_id ); 696 } 697 } 698 699 return false; 700 } 701 702 /** 703 * Redirects a variety of shorthand URLs to the admin. 704 * 705 * If a user visits example.com/admin, they'll be redirected to /wp-admin. 706 * Visiting /login redirects to /wp-login.php, and so on. 707 * 708 * @since 3.4.0 709 * 710 * @global WP_Rewrite $wp_rewrite 711 */ 712 function wp_redirect_admin_locations() { 713 global $wp_rewrite; 714 if ( ! ( is_404() && $wp_rewrite->using_permalinks() ) ) { 715 return; 716 } 717 718 $admins = array( 719 home_url( 'wp-admin', 'relative' ), 720 home_url( 'dashboard', 'relative' ), 721 home_url( 'admin', 'relative' ), 722 site_url( 'dashboard', 'relative' ), 723 site_url( 'admin', 'relative' ), 724 ); 725 if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $admins ) ) { 726 wp_redirect( admin_url() ); 727 exit; 728 } 729 730 $logins = array( 731 home_url( 'wp-login.php', 'relative' ), 732 home_url( 'login', 'relative' ), 733 site_url( 'login', 'relative' ), 734 ); 735 if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $logins ) ) { 736 wp_redirect( wp_login_url() ); 737 exit; 738 } 739 }
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| Generated: Mon Jun 17 08:20:02 2019 | Cross-referenced by PHPXref 0.7 |