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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, favicon.ico, searches, 23 * or on POST 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 WordPress rewrite component. 32 * @global bool $is_IIS 33 * @global WP_Query $wp_query WordPress Query object. 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' ), true ) ) { 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_favicon() || ( $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 /* 87 * If the original URL ended with non-breaking spaces, they were almost 88 * certainly inserted by accident. Let's remove them, so the reader doesn't 89 * see a 404 error with no obvious cause. 90 */ 91 $redirect['path'] = preg_replace( '|(%C2%A0)+$|i', '', $redirect['path'] ); 92 93 // It's not a preview, so remove it from URL. 94 if ( get_query_var( 'preview' ) ) { 95 $redirect['query'] = remove_query_arg( 'preview', $redirect['query'] ); 96 } 97 98 $id = get_query_var( 'p' ); 99 100 if ( is_feed() && $id ) { 101 $redirect_url = get_post_comments_feed_link( $id, get_query_var( 'feed' ) ); 102 if ( $redirect_url ) { 103 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type', 'feed' ), $redirect_url ); 104 $redirect['path'] = parse_url( $redirect_url, PHP_URL_PATH ); 105 } 106 } 107 108 if ( is_singular() && 1 > $wp_query->post_count && $id ) { 109 110 $vars = $wpdb->get_results( $wpdb->prepare( "SELECT post_type, post_parent FROM $wpdb->posts WHERE ID = %d", $id ) ); 111 112 if ( ! empty( $vars[0] ) ) { 113 $vars = $vars[0]; 114 if ( 'revision' == $vars->post_type && $vars->post_parent > 0 ) { 115 $id = $vars->post_parent; 116 } 117 118 $redirect_url = get_permalink( $id ); 119 if ( $redirect_url ) { 120 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); 121 } 122 } 123 } 124 125 // These tests give us a WP-generated permalink. 126 if ( is_404() ) { 127 128 // Redirect ?page_id, ?p=, ?attachment_id= to their respective URLs. 129 $id = max( get_query_var( 'p' ), get_query_var( 'page_id' ), get_query_var( 'attachment_id' ) ); 130 $redirect_post = $id ? get_post( $id ) : false; 131 if ( $redirect_post ) { 132 $post_type_obj = get_post_type_object( $redirect_post->post_type ); 133 if ( $post_type_obj->public && 'auto-draft' != $redirect_post->post_status ) { 134 $redirect_url = get_permalink( $redirect_post ); 135 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); 136 } 137 } 138 139 if ( get_query_var( 'day' ) && get_query_var( 'monthnum' ) && get_query_var( 'year' ) ) { 140 $year = get_query_var( 'year' ); 141 $month = get_query_var( 'monthnum' ); 142 $day = get_query_var( 'day' ); 143 $date = sprintf( '%04d-%02d-%02d', $year, $month, $day ); 144 if ( ! wp_checkdate( $month, $day, $year, $date ) ) { 145 $redirect_url = get_month_link( $year, $month ); 146 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'year', 'monthnum', 'day' ), $redirect_url ); 147 } 148 } elseif ( get_query_var( 'monthnum' ) && get_query_var( 'year' ) && 12 < get_query_var( 'monthnum' ) ) { 149 $redirect_url = get_year_link( get_query_var( 'year' ) ); 150 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'year', 'monthnum' ), $redirect_url ); 151 } 152 153 if ( ! $redirect_url ) { 154 $redirect_url = redirect_guess_404_permalink(); 155 if ( $redirect_url ) { 156 $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 ); 157 } 158 } 159 160 if ( get_query_var( 'page' ) && $wp_query->post && 161 false !== strpos( $wp_query->post->post_content, '<!--nextpage-->' ) ) { 162 $redirect['path'] = rtrim( $redirect['path'], (int) get_query_var( 'page' ) . '/' ); 163 $redirect['query'] = remove_query_arg( 'page', $redirect['query'] ); 164 $redirect_url = get_permalink( $wp_query->post->ID ); 165 } 166 } elseif ( is_object( $wp_rewrite ) && $wp_rewrite->using_permalinks() ) { 167 // Rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101. 168 if ( is_attachment() && 169 ! array_diff( array_keys( $wp->query_vars ), array( 'attachment', 'attachment_id' ) ) && 170 ! $redirect_url ) { 171 if ( ! empty( $_GET['attachment_id'] ) ) { 172 $redirect_url = get_attachment_link( get_query_var( 'attachment_id' ) ); 173 if ( $redirect_url ) { 174 $redirect['query'] = remove_query_arg( 'attachment_id', $redirect['query'] ); 175 } 176 } else { 177 $redirect_url = get_attachment_link(); 178 } 179 } elseif ( is_single() && ! empty( $_GET['p'] ) && ! $redirect_url ) { 180 $redirect_url = get_permalink( get_query_var( 'p' ) ); 181 if ( $redirect_url ) { 182 $redirect['query'] = remove_query_arg( array( 'p', 'post_type' ), $redirect['query'] ); 183 } 184 } elseif ( is_single() && ! empty( $_GET['name'] ) && ! $redirect_url ) { 185 $redirect_url = get_permalink( $wp_query->get_queried_object_id() ); 186 if ( $redirect_url ) { 187 $redirect['query'] = remove_query_arg( 'name', $redirect['query'] ); 188 } 189 } elseif ( is_page() && ! empty( $_GET['page_id'] ) && ! $redirect_url ) { 190 $redirect_url = get_permalink( get_query_var( 'page_id' ) ); 191 if ( $redirect_url ) { 192 $redirect['query'] = remove_query_arg( 'page_id', $redirect['query'] ); 193 } 194 } elseif ( is_page() && ! is_feed() && 'page' == get_option( 'show_on_front' ) && get_queried_object_id() == get_option( 'page_on_front' ) && ! $redirect_url ) { 195 $redirect_url = home_url( '/' ); 196 } 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 ) { 197 $redirect_url = get_permalink( get_option( 'page_for_posts' ) ); 198 if ( $redirect_url ) { 199 $redirect['query'] = remove_query_arg( 'page_id', $redirect['query'] ); 200 } 201 } elseif ( ! empty( $_GET['m'] ) && ( is_year() || is_month() || is_day() ) ) { 202 $m = get_query_var( 'm' ); 203 switch ( strlen( $m ) ) { 204 case 4: // Yearly. 205 $redirect_url = get_year_link( $m ); 206 break; 207 case 6: // Monthly. 208 $redirect_url = get_month_link( substr( $m, 0, 4 ), substr( $m, 4, 2 ) ); 209 break; 210 case 8: // Daily. 211 $redirect_url = get_day_link( substr( $m, 0, 4 ), substr( $m, 4, 2 ), substr( $m, 6, 2 ) ); 212 break; 213 } 214 if ( $redirect_url ) { 215 $redirect['query'] = remove_query_arg( 'm', $redirect['query'] ); 216 } 217 // Now moving on to non ?m=X year/month/day links. 218 } elseif ( is_day() && get_query_var( 'year' ) && get_query_var( 'monthnum' ) && ! empty( $_GET['day'] ) ) { 219 $redirect_url = get_day_link( get_query_var( 'year' ), get_query_var( 'monthnum' ), get_query_var( 'day' ) ); 220 if ( $redirect_url ) { 221 $redirect['query'] = remove_query_arg( array( 'year', 'monthnum', 'day' ), $redirect['query'] ); 222 } 223 } elseif ( is_month() && get_query_var( 'year' ) && ! empty( $_GET['monthnum'] ) ) { 224 $redirect_url = get_month_link( get_query_var( 'year' ), get_query_var( 'monthnum' ) ); 225 if ( $redirect_url ) { 226 $redirect['query'] = remove_query_arg( array( 'year', 'monthnum' ), $redirect['query'] ); 227 } 228 } elseif ( is_year() && ! empty( $_GET['year'] ) ) { 229 $redirect_url = get_year_link( get_query_var( 'year' ) ); 230 if ( $redirect_url ) { 231 $redirect['query'] = remove_query_arg( 'year', $redirect['query'] ); 232 } 233 } elseif ( is_author() && ! empty( $_GET['author'] ) && preg_match( '|^[0-9]+$|', $_GET['author'] ) ) { 234 $author = get_userdata( get_query_var( 'author' ) ); 235 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 ) ) ) { 236 $redirect_url = get_author_posts_url( $author->ID, $author->user_nicename ); 237 if ( $redirect_url ) { 238 $redirect['query'] = remove_query_arg( 'author', $redirect['query'] ); 239 } 240 } 241 } elseif ( is_category() || is_tag() || is_tax() ) { // Terms (tags/categories). 242 243 $term_count = 0; 244 foreach ( $wp_query->tax_query->queried_terms as $tax_query ) { 245 $term_count += count( $tax_query['terms'] ); 246 } 247 248 $obj = $wp_query->get_queried_object(); 249 if ( $term_count <= 1 && ! empty( $obj->term_id ) ) { 250 $tax_url = get_term_link( (int) $obj->term_id, $obj->taxonomy ); 251 if ( $tax_url && ! is_wp_error( $tax_url ) ) { 252 if ( ! empty( $redirect['query'] ) ) { 253 // Strip taxonomy query vars off the URL. 254 $qv_remove = array( 'term', 'taxonomy' ); 255 if ( is_category() ) { 256 $qv_remove[] = 'category_name'; 257 $qv_remove[] = 'cat'; 258 } elseif ( is_tag() ) { 259 $qv_remove[] = 'tag'; 260 $qv_remove[] = 'tag_id'; 261 } else { 262 // Custom taxonomies will have a custom query var, remove those too. 263 $tax_obj = get_taxonomy( $obj->taxonomy ); 264 if ( false !== $tax_obj->query_var ) { 265 $qv_remove[] = $tax_obj->query_var; 266 } 267 } 268 269 $rewrite_vars = array_diff( array_keys( $wp_query->query ), array_keys( $_GET ) ); 270 271 // Check to see if all the query vars are coming from the rewrite, none are set via $_GET. 272 if ( ! array_diff( $rewrite_vars, array_keys( $_GET ) ) ) { 273 // Remove all of the per-tax query vars. 274 $redirect['query'] = remove_query_arg( $qv_remove, $redirect['query'] ); 275 276 // Create the destination URL for this taxonomy. 277 $tax_url = parse_url( $tax_url ); 278 if ( ! empty( $tax_url['query'] ) ) { 279 // Taxonomy accessible via ?taxonomy=...&term=... or any custom query var. 280 parse_str( $tax_url['query'], $query_vars ); 281 $redirect['query'] = add_query_arg( $query_vars, $redirect['query'] ); 282 } else { 283 // Taxonomy is accessible via a "pretty URL". 284 $redirect['path'] = $tax_url['path']; 285 } 286 } else { 287 // Some query vars are set via $_GET. Unset those from $_GET that exist via the rewrite. 288 foreach ( $qv_remove as $_qv ) { 289 if ( isset( $rewrite_vars[ $_qv ] ) ) { 290 $redirect['query'] = remove_query_arg( $_qv, $redirect['query'] ); 291 } 292 } 293 } 294 } 295 } 296 } 297 } elseif ( is_single() && strpos( $wp_rewrite->permalink_structure, '%category%' ) !== false ) { 298 $cat = get_query_var( 'category_name' ); 299 if ( $cat ) { 300 $category = get_category_by_path( $cat ); 301 if ( ( ! $category || is_wp_error( $category ) ) || ! has_term( $category->term_id, 'category', $wp_query->get_queried_object_id() ) ) { 302 $redirect_url = get_permalink( $wp_query->get_queried_object_id() ); 303 } 304 } 305 } 306 307 // Post paging. 308 if ( is_singular() && get_query_var( 'page' ) ) { 309 if ( ! $redirect_url ) { 310 $redirect_url = get_permalink( get_queried_object_id() ); 311 } 312 313 $page = get_query_var( 'page' ); 314 if ( $page > 1 ) { 315 if ( is_front_page() ) { 316 $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( "$wp_rewrite->pagination_base/$page", 'paged' ); 317 } else { 318 $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( $page, 'single_paged' ); 319 } 320 } 321 $redirect['query'] = remove_query_arg( 'page', $redirect['query'] ); 322 } 323 324 // Paging and feeds. 325 if ( get_query_var( 'paged' ) || is_feed() || get_query_var( 'cpage' ) ) { 326 while ( preg_match( "#/$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'] ) ) { 327 // Strip off paging and feed. 328 $redirect['path'] = preg_replace( "#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", '/', $redirect['path'] ); // Strip off any existing paging. 329 $redirect['path'] = preg_replace( '#/(comments/?)?(feed|rss2?|rdf|atom)(/+|$)#', '/', $redirect['path'] ); // Strip off feed endings. 330 $redirect['path'] = preg_replace( "#/{$wp_rewrite->comments_pagination_base}-[0-9]+?(/+)?$#", '/', $redirect['path'] ); // Strip off any existing comment paging. 331 } 332 333 $addl_path = ''; 334 if ( is_feed() && in_array( get_query_var( 'feed' ), $wp_rewrite->feeds, true ) ) { 335 $addl_path = ! empty( $addl_path ) ? trailingslashit( $addl_path ) : ''; 336 if ( ! is_singular() && get_query_var( 'withcomments' ) ) { 337 $addl_path .= 'comments/'; 338 } 339 if ( ( 'rss' == get_default_feed() && 'feed' == get_query_var( 'feed' ) ) || 'rss' == get_query_var( 'feed' ) ) { 340 $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == 'rss2' ) ? '' : 'rss2' ), 'feed' ); 341 } else { 342 $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == get_query_var( 'feed' ) || 'feed' == get_query_var( 'feed' ) ) ? '' : get_query_var( 'feed' ) ), 'feed' ); 343 } 344 $redirect['query'] = remove_query_arg( 'feed', $redirect['query'] ); 345 } elseif ( is_feed() && 'old' == get_query_var( 'feed' ) ) { 346 $old_feed_files = array( 347 'wp-atom.php' => 'atom', 348 'wp-commentsrss2.php' => 'comments_rss2', 349 'wp-feed.php' => get_default_feed(), 350 'wp-rdf.php' => 'rdf', 351 'wp-rss.php' => 'rss2', 352 'wp-rss2.php' => 'rss2', 353 ); 354 if ( isset( $old_feed_files[ basename( $redirect['path'] ) ] ) ) { 355 $redirect_url = get_feed_link( $old_feed_files[ basename( $redirect['path'] ) ] ); 356 wp_redirect( $redirect_url, 301 ); 357 die(); 358 } 359 } 360 361 if ( get_query_var( 'paged' ) > 0 ) { 362 $paged = get_query_var( 'paged' ); 363 $redirect['query'] = remove_query_arg( 'paged', $redirect['query'] ); 364 if ( ! is_feed() ) { 365 if ( $paged > 1 && ! is_single() ) { 366 $addl_path = ( ! empty( $addl_path ) ? trailingslashit( $addl_path ) : '' ) . user_trailingslashit( "$wp_rewrite->pagination_base/$paged", 'paged' ); 367 } elseif ( ! is_single() ) { 368 $addl_path = ! empty( $addl_path ) ? trailingslashit( $addl_path ) : ''; 369 } 370 } elseif ( $paged > 1 ) { 371 $redirect['query'] = add_query_arg( 'paged', $paged, $redirect['query'] ); 372 } 373 } 374 375 if ( get_option( 'page_comments' ) && ( 376 ( 'newest' == get_option( 'default_comments_page' ) && get_query_var( 'cpage' ) > 0 ) || 377 ( 'newest' != get_option( 'default_comments_page' ) && get_query_var( 'cpage' ) > 1 ) 378 ) ) { 379 $addl_path = ( ! empty( $addl_path ) ? trailingslashit( $addl_path ) : '' ) . user_trailingslashit( $wp_rewrite->comments_pagination_base . '-' . get_query_var( 'cpage' ), 'commentpaged' ); 380 $redirect['query'] = remove_query_arg( 'cpage', $redirect['query'] ); 381 } 382 383 $redirect['path'] = user_trailingslashit( preg_replace( '|/' . preg_quote( $wp_rewrite->index, '|' ) . '/?$|', '/', $redirect['path'] ) ); // Strip off trailing /index.php/. 384 if ( ! empty( $addl_path ) && $wp_rewrite->using_index_permalinks() && strpos( $redirect['path'], '/' . $wp_rewrite->index . '/' ) === false ) { 385 $redirect['path'] = trailingslashit( $redirect['path'] ) . $wp_rewrite->index . '/'; 386 } 387 if ( ! empty( $addl_path ) ) { 388 $redirect['path'] = trailingslashit( $redirect['path'] ) . $addl_path; 389 } 390 $redirect_url = $redirect['scheme'] . '://' . $redirect['host'] . $redirect['path']; 391 } 392 393 if ( 'wp-register.php' == basename( $redirect['path'] ) ) { 394 if ( is_multisite() ) { 395 /** This filter is documented in wp-login.php */ 396 $redirect_url = apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) ); 397 } else { 398 $redirect_url = wp_registration_url(); 399 } 400 401 wp_redirect( $redirect_url, 301 ); 402 die(); 403 } 404 } 405 406 // Tack on any additional query vars. 407 $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); 408 if ( $redirect_url && ! empty( $redirect['query'] ) ) { 409 parse_str( $redirect['query'], $_parsed_query ); 410 $redirect = @parse_url( $redirect_url ); 411 412 if ( ! empty( $_parsed_query['name'] ) && ! empty( $redirect['query'] ) ) { 413 parse_str( $redirect['query'], $_parsed_redirect_query ); 414 415 if ( empty( $_parsed_redirect_query['name'] ) ) { 416 unset( $_parsed_query['name'] ); 417 } 418 } 419 420 $_parsed_query = array_combine( 421 rawurlencode_deep( array_keys( $_parsed_query ) ), 422 rawurlencode_deep( array_values( $_parsed_query ) ) 423 ); 424 $redirect_url = add_query_arg( $_parsed_query, $redirect_url ); 425 } 426 427 if ( $redirect_url ) { 428 $redirect = @parse_url( $redirect_url ); 429 } 430 431 // www.example.com vs. example.com 432 $user_home = @parse_url( home_url() ); 433 if ( ! empty( $user_home['host'] ) ) { 434 $redirect['host'] = $user_home['host']; 435 } 436 if ( empty( $user_home['path'] ) ) { 437 $user_home['path'] = '/'; 438 } 439 440 // Handle ports. 441 if ( ! empty( $user_home['port'] ) ) { 442 $redirect['port'] = $user_home['port']; 443 } else { 444 unset( $redirect['port'] ); 445 } 446 447 // Trailing /index.php. 448 $redirect['path'] = preg_replace( '|/' . preg_quote( $wp_rewrite->index, '|' ) . '/*?$|', '/', $redirect['path'] ); 449 450 $punctuation_pattern = implode( 451 '|', 452 array_map( 453 'preg_quote', 454 array( 455 ' ', 456 '%20', // Space. 457 '!', 458 '%21', // Exclamation mark. 459 '"', 460 '%22', // Double quote. 461 "'", 462 '%27', // Single quote. 463 '(', 464 '%28', // Opening bracket. 465 ')', 466 '%29', // Closing bracket. 467 ',', 468 '%2C', // Comma. 469 '.', 470 '%2E', // Period. 471 ';', 472 '%3B', // Semicolon. 473 '{', 474 '%7B', // Opening curly bracket. 475 '}', 476 '%7D', // Closing curly bracket. 477 '%E2%80%9C', // Opening curly quote. 478 '%E2%80%9D', // Closing curly quote. 479 ) 480 ) 481 ); 482 483 // Remove trailing spaces and end punctuation from the path. 484 $redirect['path'] = preg_replace( "#($punctuation_pattern)+$#", '', $redirect['path'] ); 485 486 if ( ! empty( $redirect['query'] ) ) { 487 // Remove trailing spaces and end punctuation from certain terminating query string args. 488 $redirect['query'] = preg_replace( "#((^|&)(p|page_id|cat|tag)=[^&]*?)($punctuation_pattern)+$#", '$1', $redirect['query'] ); 489 490 // Clean up empty query strings. 491 $redirect['query'] = trim( preg_replace( '#(^|&)(p|page_id|cat|tag)=?(&|$)#', '&', $redirect['query'] ), '&' ); 492 493 // Redirect obsolete feeds. 494 $redirect['query'] = preg_replace( '#(^|&)feed=rss(&|$)#', '$1feed=rss2$2', $redirect['query'] ); 495 496 // Remove redundant leading ampersands. 497 $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); 498 } 499 500 // Strip /index.php/ when we're not using PATHINFO permalinks. 501 if ( ! $wp_rewrite->using_index_permalinks() ) { 502 $redirect['path'] = str_replace( '/' . $wp_rewrite->index . '/', '/', $redirect['path'] ); 503 } 504 505 // Trailing slashes. 506 if ( is_object( $wp_rewrite ) && $wp_rewrite->using_permalinks() && ! is_404() && ( ! is_front_page() || ( is_front_page() && ( get_query_var( 'paged' ) > 1 ) ) ) ) { 507 $user_ts_type = ''; 508 if ( get_query_var( 'paged' ) > 0 ) { 509 $user_ts_type = 'paged'; 510 } else { 511 foreach ( array( 'single', 'category', 'page', 'day', 'month', 'year', 'home' ) as $type ) { 512 $func = 'is_' . $type; 513 if ( call_user_func( $func ) ) { 514 $user_ts_type = $type; 515 break; 516 } 517 } 518 } 519 $redirect['path'] = user_trailingslashit( $redirect['path'], $user_ts_type ); 520 } elseif ( is_front_page() ) { 521 $redirect['path'] = trailingslashit( $redirect['path'] ); 522 } 523 524 // Strip multiple slashes out of the URL. 525 if ( strpos( $redirect['path'], '//' ) > -1 ) { 526 $redirect['path'] = preg_replace( '|/+|', '/', $redirect['path'] ); 527 } 528 529 // Always trailing slash the Front Page URL. 530 if ( trailingslashit( $redirect['path'] ) == trailingslashit( $user_home['path'] ) ) { 531 $redirect['path'] = trailingslashit( $redirect['path'] ); 532 } 533 534 // Ignore differences in host capitalization, as this can lead to infinite redirects. 535 // Only redirect no-www <=> yes-www. 536 if ( strtolower( $original['host'] ) == strtolower( $redirect['host'] ) || 537 ( strtolower( $original['host'] ) != 'www.' . strtolower( $redirect['host'] ) && 'www.' . strtolower( $original['host'] ) != strtolower( $redirect['host'] ) ) ) { 538 $redirect['host'] = $original['host']; 539 } 540 541 $compare_original = array( $original['host'], $original['path'] ); 542 543 if ( ! empty( $original['port'] ) ) { 544 $compare_original[] = $original['port']; 545 } 546 547 if ( ! empty( $original['query'] ) ) { 548 $compare_original[] = $original['query']; 549 } 550 551 $compare_redirect = array( $redirect['host'], $redirect['path'] ); 552 553 if ( ! empty( $redirect['port'] ) ) { 554 $compare_redirect[] = $redirect['port']; 555 } 556 557 if ( ! empty( $redirect['query'] ) ) { 558 $compare_redirect[] = $redirect['query']; 559 } 560 561 if ( $compare_original !== $compare_redirect ) { 562 $redirect_url = $redirect['scheme'] . '://' . $redirect['host']; 563 if ( ! empty( $redirect['port'] ) ) { 564 $redirect_url .= ':' . $redirect['port']; 565 } 566 $redirect_url .= $redirect['path']; 567 if ( ! empty( $redirect['query'] ) ) { 568 $redirect_url .= '?' . $redirect['query']; 569 } 570 } 571 572 if ( ! $redirect_url || $redirect_url == $requested_url ) { 573 return; 574 } 575 576 // Hex encoded octets are case-insensitive. 577 if ( false !== strpos( $requested_url, '%' ) ) { 578 if ( ! function_exists( 'lowercase_octets' ) ) { 579 /** 580 * Converts the first hex-encoded octet match to lowercase. 581 * 582 * @since 3.1.0 583 * @ignore 584 * 585 * @param array $matches Hex-encoded octet matches for the requested URL. 586 * @return string Lowercased version of the first match. 587 */ 588 function lowercase_octets( $matches ) { 589 return strtolower( $matches[0] ); 590 } 591 } 592 $requested_url = preg_replace_callback( '|%[a-fA-F0-9][a-fA-F0-9]|', 'lowercase_octets', $requested_url ); 593 } 594 595 /** 596 * Filters the canonical redirect URL. 597 * 598 * Returning false to this filter will cancel the redirect. 599 * 600 * @since 2.3.0 601 * 602 * @param string $redirect_url The redirect URL. 603 * @param string $requested_url The requested URL. 604 */ 605 $redirect_url = apply_filters( 'redirect_canonical', $redirect_url, $requested_url ); 606 607 // Yes, again -- in case the filter aborted the request. 608 if ( ! $redirect_url || strip_fragment_from_url( $redirect_url ) == strip_fragment_from_url( $requested_url ) ) { 609 return; 610 } 611 612 if ( $do_redirect ) { 613 // Protect against chained redirects. 614 if ( ! redirect_canonical( $redirect_url, false ) ) { 615 wp_redirect( $redirect_url, 301 ); 616 exit(); 617 } else { 618 // Debug. 619 // die("1: $redirect_url<br />2: " . redirect_canonical( $redirect_url, false ) ); 620 return; 621 } 622 } else { 623 return $redirect_url; 624 } 625 } 626 627 /** 628 * Removes arguments from a query string if they are not present in a URL 629 * DO NOT use this in plugin code. 630 * 631 * @since 3.4.0 632 * @access private 633 * 634 * @param string $query_string 635 * @param array $args_to_check 636 * @param string $url 637 * @return string The altered query string 638 */ 639 function _remove_qs_args_if_not_in_url( $query_string, array $args_to_check, $url ) { 640 $parsed_url = @parse_url( $url ); 641 if ( ! empty( $parsed_url['query'] ) ) { 642 parse_str( $parsed_url['query'], $parsed_query ); 643 foreach ( $args_to_check as $qv ) { 644 if ( ! isset( $parsed_query[ $qv ] ) ) { 645 $query_string = remove_query_arg( $qv, $query_string ); 646 } 647 } 648 } else { 649 $query_string = remove_query_arg( $args_to_check, $query_string ); 650 } 651 return $query_string; 652 } 653 654 /** 655 * Strips the #fragment from a URL, if one is present. 656 * 657 * @since 4.4.0 658 * 659 * @param string $url The URL to strip. 660 * @return string The altered URL. 661 */ 662 function strip_fragment_from_url( $url ) { 663 $parsed_url = @parse_url( $url ); 664 if ( ! empty( $parsed_url['host'] ) ) { 665 // This mirrors code in redirect_canonical(). It does not handle every case. 666 $url = $parsed_url['scheme'] . '://' . $parsed_url['host']; 667 if ( ! empty( $parsed_url['port'] ) ) { 668 $url .= ':' . $parsed_url['port']; 669 } 670 671 if ( ! empty( $parsed_url['path'] ) ) { 672 $url .= $parsed_url['path']; 673 } 674 675 if ( ! empty( $parsed_url['query'] ) ) { 676 $url .= '?' . $parsed_url['query']; 677 } 678 } 679 680 return $url; 681 } 682 683 /** 684 * Attempts to guess the correct URL based on query vars 685 * 686 * @since 2.3.0 687 * 688 * @global wpdb $wpdb WordPress database abstraction object. 689 * 690 * @return string|false The correct URL if one is found. False on failure. 691 */ 692 function redirect_guess_404_permalink() { 693 global $wpdb; 694 695 if ( get_query_var( 'name' ) ) { 696 $where = $wpdb->prepare( 'post_name LIKE %s', $wpdb->esc_like( get_query_var( 'name' ) ) . '%' ); 697 698 // If any of post_type, year, monthnum, or day are set, use them to refine the query. 699 if ( get_query_var( 'post_type' ) ) { 700 $where .= $wpdb->prepare( ' AND post_type = %s', get_query_var( 'post_type' ) ); 701 } else { 702 $where .= " AND post_type IN ('" . implode( "', '", get_post_types( array( 'public' => true ) ) ) . "')"; 703 } 704 705 if ( get_query_var( 'year' ) ) { 706 $where .= $wpdb->prepare( ' AND YEAR(post_date) = %d', get_query_var( 'year' ) ); 707 } 708 if ( get_query_var( 'monthnum' ) ) { 709 $where .= $wpdb->prepare( ' AND MONTH(post_date) = %d', get_query_var( 'monthnum' ) ); 710 } 711 if ( get_query_var( 'day' ) ) { 712 $where .= $wpdb->prepare( ' AND DAYOFMONTH(post_date) = %d', get_query_var( 'day' ) ); 713 } 714 715 $post_id = $wpdb->get_var( "SELECT ID FROM $wpdb->posts WHERE $where AND post_status = 'publish'" ); 716 if ( ! $post_id ) { 717 return false; 718 } 719 if ( get_query_var( 'feed' ) ) { 720 return get_post_comments_feed_link( $post_id, get_query_var( 'feed' ) ); 721 } elseif ( get_query_var( 'page' ) && 1 < get_query_var( 'page' ) ) { 722 return trailingslashit( get_permalink( $post_id ) ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' ); 723 } else { 724 return get_permalink( $post_id ); 725 } 726 } 727 728 return false; 729 } 730 731 /** 732 * Redirects a variety of shorthand URLs to the admin. 733 * 734 * If a user visits example.com/admin, they'll be redirected to /wp-admin. 735 * Visiting /login redirects to /wp-login.php, and so on. 736 * 737 * @since 3.4.0 738 * 739 * @global WP_Rewrite $wp_rewrite WordPress rewrite component. 740 */ 741 function wp_redirect_admin_locations() { 742 global $wp_rewrite; 743 if ( ! ( is_404() && $wp_rewrite->using_permalinks() ) ) { 744 return; 745 } 746 747 $admins = array( 748 home_url( 'wp-admin', 'relative' ), 749 home_url( 'dashboard', 'relative' ), 750 home_url( 'admin', 'relative' ), 751 site_url( 'dashboard', 'relative' ), 752 site_url( 'admin', 'relative' ), 753 ); 754 if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $admins, true ) ) { 755 wp_redirect( admin_url() ); 756 exit; 757 } 758 759 $logins = array( 760 home_url( 'wp-login.php', 'relative' ), 761 home_url( 'login', 'relative' ), 762 site_url( 'login', 'relative' ), 763 ); 764 if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $logins, true ) ) { 765 wp_redirect( wp_login_url() ); 766 exit; 767 } 768 }
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| Generated: Fri Apr 10 01:00:03 2020 | Cross-referenced by PHPXref 0.7.1 |