| [ Index ] |
PHP Cross Reference of WordPress |
[Summary view] [Print] [Text view]
1 <?php 2 /** 3 * WordPress environment setup class. 4 * 5 * @package WordPress 6 * @since 2.0.0 7 */ 8 class WP { 9 /** 10 * Public query variables. 11 * 12 * Long list of public query variables. 13 * 14 * @since 2.0.0 15 * @var string[] 16 */ 17 public $public_query_vars = array( 'm', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'tag', 'feed', 'author_name', 'pagename', 'page_id', 'error', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'favicon', 'taxonomy', 'term', 'cpage', 'post_type', 'embed' ); 18 19 /** 20 * Private query variables. 21 * 22 * Long list of private query variables. 23 * 24 * @since 2.0.0 25 * @var string[] 26 */ 27 public $private_query_vars = array( 'offset', 'posts_per_page', 'posts_per_archive_page', 'showposts', 'nopaging', 'post_type', 'post_status', 'category__in', 'category__not_in', 'category__and', 'tag__in', 'tag__not_in', 'tag__and', 'tag_slug__in', 'tag_slug__and', 'tag_id', 'post_mime_type', 'perm', 'comments_per_page', 'post__in', 'post__not_in', 'post_parent', 'post_parent__in', 'post_parent__not_in', 'title', 'fields' ); 28 29 /** 30 * Extra query variables set by the user. 31 * 32 * @since 2.1.0 33 * @var array 34 */ 35 public $extra_query_vars = array(); 36 37 /** 38 * Query variables for setting up the WordPress Query Loop. 39 * 40 * @since 2.0.0 41 * @var array 42 */ 43 public $query_vars; 44 45 /** 46 * String parsed to set the query variables. 47 * 48 * @since 2.0.0 49 * @var string 50 */ 51 public $query_string; 52 53 /** 54 * The request path, e.g. 2015/05/06. 55 * 56 * @since 2.0.0 57 * @var string 58 */ 59 public $request; 60 61 /** 62 * Rewrite rule the request matched. 63 * 64 * @since 2.0.0 65 * @var string 66 */ 67 public $matched_rule; 68 69 /** 70 * Rewrite query the request matched. 71 * 72 * @since 2.0.0 73 * @var string 74 */ 75 public $matched_query; 76 77 /** 78 * Whether already did the permalink. 79 * 80 * @since 2.0.0 81 * @var bool 82 */ 83 public $did_permalink = false; 84 85 /** 86 * Adds a query variable to the list of public query variables. 87 * 88 * @since 2.1.0 89 * 90 * @param string $qv Query variable name. 91 */ 92 public function add_query_var( $qv ) { 93 if ( ! in_array( $qv, $this->public_query_vars, true ) ) { 94 $this->public_query_vars[] = $qv; 95 } 96 } 97 98 /** 99 * Removes a query variable from a list of public query variables. 100 * 101 * @since 4.5.0 102 * 103 * @param string $name Query variable name. 104 */ 105 public function remove_query_var( $name ) { 106 $this->public_query_vars = array_diff( $this->public_query_vars, array( $name ) ); 107 } 108 109 /** 110 * Sets the value of a query variable. 111 * 112 * @since 2.3.0 113 * 114 * @param string $key Query variable name. 115 * @param mixed $value Query variable value. 116 */ 117 public function set_query_var( $key, $value ) { 118 $this->query_vars[ $key ] = $value; 119 } 120 121 /** 122 * Parses the request to find the correct WordPress query. 123 * 124 * Sets up the query variables based on the request. There are also many 125 * filters and actions that can be used to further manipulate the result. 126 * 127 * @since 2.0.0 128 * 129 * @global WP_Rewrite $wp_rewrite WordPress rewrite component. 130 * 131 * @param array|string $extra_query_vars Set the extra query variables. 132 */ 133 public function parse_request( $extra_query_vars = '' ) { 134 global $wp_rewrite; 135 136 /** 137 * Filters whether to parse the request. 138 * 139 * @since 3.5.0 140 * 141 * @param bool $bool Whether or not to parse the request. Default true. 142 * @param WP $wp Current WordPress environment instance. 143 * @param array|string $extra_query_vars Extra passed query variables. 144 */ 145 if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) ) { 146 return; 147 } 148 149 $this->query_vars = array(); 150 $post_type_query_vars = array(); 151 152 if ( is_array( $extra_query_vars ) ) { 153 $this->extra_query_vars = & $extra_query_vars; 154 } elseif ( ! empty( $extra_query_vars ) ) { 155 parse_str( $extra_query_vars, $this->extra_query_vars ); 156 } 157 // Process PATH_INFO, REQUEST_URI, and 404 for permalinks. 158 159 // Fetch the rewrite rules. 160 $rewrite = $wp_rewrite->wp_rewrite_rules(); 161 162 if ( ! empty( $rewrite ) ) { 163 // If we match a rewrite rule, this will be cleared. 164 $error = '404'; 165 $this->did_permalink = true; 166 167 $pathinfo = isset( $_SERVER['PATH_INFO'] ) ? $_SERVER['PATH_INFO'] : ''; 168 list( $pathinfo ) = explode( '?', $pathinfo ); 169 $pathinfo = str_replace( '%', '%25', $pathinfo ); 170 171 list( $req_uri ) = explode( '?', $_SERVER['REQUEST_URI'] ); 172 $self = $_SERVER['PHP_SELF']; 173 174 $home_path = parse_url( home_url(), PHP_URL_PATH ); 175 $home_path_regex = ''; 176 if ( is_string( $home_path ) && '' !== $home_path ) { 177 $home_path = trim( $home_path, '/' ); 178 $home_path_regex = sprintf( '|^%s|i', preg_quote( $home_path, '|' ) ); 179 } 180 181 /* 182 * Trim path info from the end and the leading home path from the front. 183 * For path info requests, this leaves us with the requesting filename, if any. 184 * For 404 requests, this leaves us with the requested permalink. 185 */ 186 $req_uri = str_replace( $pathinfo, '', $req_uri ); 187 $req_uri = trim( $req_uri, '/' ); 188 $pathinfo = trim( $pathinfo, '/' ); 189 $self = trim( $self, '/' ); 190 191 if ( ! empty( $home_path_regex ) ) { 192 $req_uri = preg_replace( $home_path_regex, '', $req_uri ); 193 $req_uri = trim( $req_uri, '/' ); 194 $pathinfo = preg_replace( $home_path_regex, '', $pathinfo ); 195 $pathinfo = trim( $pathinfo, '/' ); 196 $self = preg_replace( $home_path_regex, '', $self ); 197 $self = trim( $self, '/' ); 198 } 199 200 // The requested permalink is in $pathinfo for path info requests and 201 // $req_uri for other requests. 202 if ( ! empty( $pathinfo ) && ! preg_match( '|^.*' . $wp_rewrite->index . '$|', $pathinfo ) ) { 203 $requested_path = $pathinfo; 204 } else { 205 // If the request uri is the index, blank it out so that we don't try to match it against a rule. 206 if ( $req_uri == $wp_rewrite->index ) { 207 $req_uri = ''; 208 } 209 $requested_path = $req_uri; 210 } 211 $requested_file = $req_uri; 212 213 $this->request = $requested_path; 214 215 // Look for matches. 216 $request_match = $requested_path; 217 if ( empty( $request_match ) ) { 218 // An empty request could only match against ^$ regex. 219 if ( isset( $rewrite['$'] ) ) { 220 $this->matched_rule = '$'; 221 $query = $rewrite['$']; 222 $matches = array( '' ); 223 } 224 } else { 225 foreach ( (array) $rewrite as $match => $query ) { 226 // If the requested file is the anchor of the match, prepend it to the path info. 227 if ( ! empty( $requested_file ) && strpos( $match, $requested_file ) === 0 && $requested_file != $requested_path ) { 228 $request_match = $requested_file . '/' . $requested_path; 229 } 230 231 if ( preg_match( "#^$match#", $request_match, $matches ) || 232 preg_match( "#^$match#", urldecode( $request_match ), $matches ) ) { 233 234 if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) { 235 // This is a verbose page match, let's check to be sure about it. 236 $page = get_page_by_path( $matches[ $varmatch[1] ] ); 237 if ( ! $page ) { 238 continue; 239 } 240 241 $post_status_obj = get_post_status_object( $page->post_status ); 242 if ( ! $post_status_obj->public && ! $post_status_obj->protected 243 && ! $post_status_obj->private && $post_status_obj->exclude_from_search ) { 244 continue; 245 } 246 } 247 248 // Got a match. 249 $this->matched_rule = $match; 250 break; 251 } 252 } 253 } 254 255 if ( isset( $this->matched_rule ) ) { 256 // Trim the query of everything up to the '?'. 257 $query = preg_replace( '!^.+\?!', '', $query ); 258 259 // Substitute the substring matches into the query. 260 $query = addslashes( WP_MatchesMapRegex::apply( $query, $matches ) ); 261 262 $this->matched_query = $query; 263 264 // Parse the query. 265 parse_str( $query, $perma_query_vars ); 266 267 // If we're processing a 404 request, clear the error var since we found something. 268 if ( '404' == $error ) { 269 unset( $error, $_GET['error'] ); 270 } 271 } 272 273 // If req_uri is empty or if it is a request for ourself, unset error. 274 if ( empty( $requested_path ) || $requested_file == $self || strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) { 275 unset( $error, $_GET['error'] ); 276 277 if ( isset( $perma_query_vars ) && strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) { 278 unset( $perma_query_vars ); 279 } 280 281 $this->did_permalink = false; 282 } 283 } 284 285 /** 286 * Filters the query variables allowed before processing. 287 * 288 * Allows (publicly allowed) query vars to be added, removed, or changed prior 289 * to executing the query. Needed to allow custom rewrite rules using your own arguments 290 * to work, or any other custom query variables you want to be publicly available. 291 * 292 * @since 1.5.0 293 * 294 * @param string[] $public_query_vars The array of allowed query variable names. 295 */ 296 $this->public_query_vars = apply_filters( 'query_vars', $this->public_query_vars ); 297 298 foreach ( get_post_types( array(), 'objects' ) as $post_type => $t ) { 299 if ( is_post_type_viewable( $t ) && $t->query_var ) { 300 $post_type_query_vars[ $t->query_var ] = $post_type; 301 } 302 } 303 304 foreach ( $this->public_query_vars as $wpvar ) { 305 if ( isset( $this->extra_query_vars[ $wpvar ] ) ) { 306 $this->query_vars[ $wpvar ] = $this->extra_query_vars[ $wpvar ]; 307 } elseif ( isset( $_GET[ $wpvar ] ) && isset( $_POST[ $wpvar ] ) && $_GET[ $wpvar ] !== $_POST[ $wpvar ] ) { 308 wp_die( __( 'A variable mismatch has been detected.' ), __( 'Sorry, you are not allowed to view this item.' ), 400 ); 309 } elseif ( isset( $_POST[ $wpvar ] ) ) { 310 $this->query_vars[ $wpvar ] = $_POST[ $wpvar ]; 311 } elseif ( isset( $_GET[ $wpvar ] ) ) { 312 $this->query_vars[ $wpvar ] = $_GET[ $wpvar ]; 313 } elseif ( isset( $perma_query_vars[ $wpvar ] ) ) { 314 $this->query_vars[ $wpvar ] = $perma_query_vars[ $wpvar ]; 315 } 316 317 if ( ! empty( $this->query_vars[ $wpvar ] ) ) { 318 if ( ! is_array( $this->query_vars[ $wpvar ] ) ) { 319 $this->query_vars[ $wpvar ] = (string) $this->query_vars[ $wpvar ]; 320 } else { 321 foreach ( $this->query_vars[ $wpvar ] as $vkey => $v ) { 322 if ( is_scalar( $v ) ) { 323 $this->query_vars[ $wpvar ][ $vkey ] = (string) $v; 324 } 325 } 326 } 327 328 if ( isset( $post_type_query_vars[ $wpvar ] ) ) { 329 $this->query_vars['post_type'] = $post_type_query_vars[ $wpvar ]; 330 $this->query_vars['name'] = $this->query_vars[ $wpvar ]; 331 } 332 } 333 } 334 335 // Convert urldecoded spaces back into '+'. 336 foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy => $t ) { 337 if ( $t->query_var && isset( $this->query_vars[ $t->query_var ] ) ) { 338 $this->query_vars[ $t->query_var ] = str_replace( ' ', '+', $this->query_vars[ $t->query_var ] ); 339 } 340 } 341 342 // Don't allow non-publicly queryable taxonomies to be queried from the front end. 343 if ( ! is_admin() ) { 344 foreach ( get_taxonomies( array( 'publicly_queryable' => false ), 'objects' ) as $taxonomy => $t ) { 345 /* 346 * Disallow when set to the 'taxonomy' query var. 347 * Non-publicly queryable taxonomies cannot register custom query vars. See register_taxonomy(). 348 */ 349 if ( isset( $this->query_vars['taxonomy'] ) && $taxonomy === $this->query_vars['taxonomy'] ) { 350 unset( $this->query_vars['taxonomy'], $this->query_vars['term'] ); 351 } 352 } 353 } 354 355 // Limit publicly queried post_types to those that are 'publicly_queryable'. 356 if ( isset( $this->query_vars['post_type'] ) ) { 357 $queryable_post_types = get_post_types( array( 'publicly_queryable' => true ) ); 358 if ( ! is_array( $this->query_vars['post_type'] ) ) { 359 if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types, true ) ) { 360 unset( $this->query_vars['post_type'] ); 361 } 362 } else { 363 $this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types ); 364 } 365 } 366 367 // Resolve conflicts between posts with numeric slugs and date archive queries. 368 $this->query_vars = wp_resolve_numeric_slug_conflicts( $this->query_vars ); 369 370 foreach ( (array) $this->private_query_vars as $var ) { 371 if ( isset( $this->extra_query_vars[ $var ] ) ) { 372 $this->query_vars[ $var ] = $this->extra_query_vars[ $var ]; 373 } 374 } 375 376 if ( isset( $error ) ) { 377 $this->query_vars['error'] = $error; 378 } 379 380 /** 381 * Filters the array of parsed query variables. 382 * 383 * @since 2.1.0 384 * 385 * @param array $query_vars The array of requested query variables. 386 */ 387 $this->query_vars = apply_filters( 'request', $this->query_vars ); 388 389 /** 390 * Fires once all query variables for the current request have been parsed. 391 * 392 * @since 2.1.0 393 * 394 * @param WP $wp Current WordPress environment instance (passed by reference). 395 */ 396 do_action_ref_array( 'parse_request', array( &$this ) ); 397 } 398 399 /** 400 * Sends additional HTTP headers for caching, content type, etc. 401 * 402 * Sets the Content-Type header. Sets the 'error' status (if passed) and optionally exits. 403 * If showing a feed, it will also send Last-Modified, ETag, and 304 status if needed. 404 * 405 * @since 2.0.0 406 * @since 4.4.0 `X-Pingback` header is added conditionally after posts have been queried in handle_404(). 407 */ 408 public function send_headers() { 409 $headers = array(); 410 $status = null; 411 $exit_required = false; 412 413 if ( is_user_logged_in() ) { 414 $headers = array_merge( $headers, wp_get_nocache_headers() ); 415 } elseif ( ! empty( $_GET['unapproved'] ) && ! empty( $_GET['moderation-hash'] ) ) { 416 // Unmoderated comments are only visible for 10 minutes via the moderation hash. 417 $expires = 10 * MINUTE_IN_SECONDS; 418 419 $headers['Expires'] = gmdate( 'D, d M Y H:i:s', time() + $expires ); 420 $headers['Cache-Control'] = sprintf( 421 'max-age=%d, must-revalidate', 422 $expires 423 ); 424 } 425 if ( ! empty( $this->query_vars['error'] ) ) { 426 $status = (int) $this->query_vars['error']; 427 if ( 404 === $status ) { 428 if ( ! is_user_logged_in() ) { 429 $headers = array_merge( $headers, wp_get_nocache_headers() ); 430 } 431 $headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' ); 432 } elseif ( in_array( $status, array( 403, 500, 502, 503 ), true ) ) { 433 $exit_required = true; 434 } 435 } elseif ( empty( $this->query_vars['feed'] ) ) { 436 $headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' ); 437 } else { 438 // Set the correct content type for feeds. 439 $type = $this->query_vars['feed']; 440 if ( 'feed' === $this->query_vars['feed'] ) { 441 $type = get_default_feed(); 442 } 443 $headers['Content-Type'] = feed_content_type( $type ) . '; charset=' . get_option( 'blog_charset' ); 444 445 // We're showing a feed, so WP is indeed the only thing that last changed. 446 if ( ! empty( $this->query_vars['withcomments'] ) 447 || false !== strpos( $this->query_vars['feed'], 'comments-' ) 448 || ( empty( $this->query_vars['withoutcomments'] ) 449 && ( ! empty( $this->query_vars['p'] ) 450 || ! empty( $this->query_vars['name'] ) 451 || ! empty( $this->query_vars['page_id'] ) 452 || ! empty( $this->query_vars['pagename'] ) 453 || ! empty( $this->query_vars['attachment'] ) 454 || ! empty( $this->query_vars['attachment_id'] ) 455 ) 456 ) 457 ) { 458 $wp_last_modified = mysql2date( 'D, d M Y H:i:s', get_lastcommentmodified( 'GMT' ), false ); 459 } else { 460 $wp_last_modified = mysql2date( 'D, d M Y H:i:s', get_lastpostmodified( 'GMT' ), false ); 461 } 462 463 if ( ! $wp_last_modified ) { 464 $wp_last_modified = gmdate( 'D, d M Y H:i:s' ); 465 } 466 467 $wp_last_modified .= ' GMT'; 468 469 $wp_etag = '"' . md5( $wp_last_modified ) . '"'; 470 $headers['Last-Modified'] = $wp_last_modified; 471 $headers['ETag'] = $wp_etag; 472 473 // Support for conditional GET. 474 if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ) { 475 $client_etag = wp_unslash( $_SERVER['HTTP_IF_NONE_MATCH'] ); 476 } else { 477 $client_etag = false; 478 } 479 480 $client_last_modified = empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ? '' : trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ); 481 // If string is empty, return 0. If not, attempt to parse into a timestamp. 482 $client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0; 483 484 // Make a timestamp for our most recent modification.. 485 $wp_modified_timestamp = strtotime( $wp_last_modified ); 486 487 if ( ( $client_last_modified && $client_etag ) ? 488 ( ( $client_modified_timestamp >= $wp_modified_timestamp ) && ( $client_etag == $wp_etag ) ) : 489 ( ( $client_modified_timestamp >= $wp_modified_timestamp ) || ( $client_etag == $wp_etag ) ) ) { 490 $status = 304; 491 $exit_required = true; 492 } 493 } 494 495 /** 496 * Filters the HTTP headers before they're sent to the browser. 497 * 498 * @since 2.8.0 499 * 500 * @param string[] $headers Associative array of headers to be sent. 501 * @param WP $wp Current WordPress environment instance. 502 */ 503 $headers = apply_filters( 'wp_headers', $headers, $this ); 504 505 if ( ! empty( $status ) ) { 506 status_header( $status ); 507 } 508 509 // If Last-Modified is set to false, it should not be sent (no-cache situation). 510 if ( isset( $headers['Last-Modified'] ) && false === $headers['Last-Modified'] ) { 511 unset( $headers['Last-Modified'] ); 512 513 if ( ! headers_sent() ) { 514 header_remove( 'Last-Modified' ); 515 } 516 } 517 518 if ( ! headers_sent() ) { 519 foreach ( (array) $headers as $name => $field_value ) { 520 header( "{$name}: {$field_value}" ); 521 } 522 } 523 524 if ( $exit_required ) { 525 exit; 526 } 527 528 /** 529 * Fires once the requested HTTP headers for caching, content type, etc. have been sent. 530 * 531 * @since 2.1.0 532 * 533 * @param WP $wp Current WordPress environment instance (passed by reference). 534 */ 535 do_action_ref_array( 'send_headers', array( &$this ) ); 536 } 537 538 /** 539 * Sets the query string property based off of the query variable property. 540 * 541 * The {@see 'query_string'} filter is deprecated, but still works. Plugins should 542 * use the {@see 'request'} filter instead. 543 * 544 * @since 2.0.0 545 */ 546 public function build_query_string() { 547 $this->query_string = ''; 548 foreach ( (array) array_keys( $this->query_vars ) as $wpvar ) { 549 if ( '' != $this->query_vars[ $wpvar ] ) { 550 $this->query_string .= ( strlen( $this->query_string ) < 1 ) ? '' : '&'; 551 if ( ! is_scalar( $this->query_vars[ $wpvar ] ) ) { // Discard non-scalars. 552 continue; 553 } 554 $this->query_string .= $wpvar . '=' . rawurlencode( $this->query_vars[ $wpvar ] ); 555 } 556 } 557 558 if ( has_filter( 'query_string' ) ) { // Don't bother filtering and parsing if no plugins are hooked in. 559 /** 560 * Filters the query string before parsing. 561 * 562 * @since 1.5.0 563 * @deprecated 2.1.0 Use {@see 'query_vars'} or {@see 'request'} filters instead. 564 * 565 * @param string $query_string The query string to modify. 566 */ 567 $this->query_string = apply_filters_deprecated( 568 'query_string', 569 array( $this->query_string ), 570 '2.1.0', 571 'query_vars, request' 572 ); 573 parse_str( $this->query_string, $this->query_vars ); 574 } 575 } 576 577 /** 578 * Set up the WordPress Globals. 579 * 580 * The query_vars property will be extracted to the GLOBALS. So care should 581 * be taken when naming global variables that might interfere with the 582 * WordPress environment. 583 * 584 * @since 2.0.0 585 * 586 * @global WP_Query $wp_query WordPress Query object. 587 * @global string $query_string Query string for the loop. 588 * @global array $posts The found posts. 589 * @global WP_Post|null $post The current post, if available. 590 * @global string $request The SQL statement for the request. 591 * @global int $more Only set, if single page or post. 592 * @global int $single If single page or post. Only set, if single page or post. 593 * @global WP_User $authordata Only set, if author archive. 594 */ 595 public function register_globals() { 596 global $wp_query; 597 598 // Extract updated query vars back into global namespace. 599 foreach ( (array) $wp_query->query_vars as $key => $value ) { 600 $GLOBALS[ $key ] = $value; 601 } 602 603 $GLOBALS['query_string'] = $this->query_string; 604 $GLOBALS['posts'] = & $wp_query->posts; 605 $GLOBALS['post'] = isset( $wp_query->post ) ? $wp_query->post : null; 606 $GLOBALS['request'] = $wp_query->request; 607 608 if ( $wp_query->is_single() || $wp_query->is_page() ) { 609 $GLOBALS['more'] = 1; 610 $GLOBALS['single'] = 1; 611 } 612 613 if ( $wp_query->is_author() ) { 614 $GLOBALS['authordata'] = get_userdata( get_queried_object_id() ); 615 } 616 } 617 618 /** 619 * Set up the current user. 620 * 621 * @since 2.0.0 622 */ 623 public function init() { 624 wp_get_current_user(); 625 } 626 627 /** 628 * Set up the Loop based on the query variables. 629 * 630 * @since 2.0.0 631 * 632 * @global WP_Query $wp_the_query WordPress Query object. 633 */ 634 public function query_posts() { 635 global $wp_the_query; 636 $this->build_query_string(); 637 $wp_the_query->query( $this->query_vars ); 638 } 639 640 /** 641 * Set the Headers for 404, if nothing is found for requested URL. 642 * 643 * Issue a 404 if a request doesn't match any posts and doesn't match any object 644 * (e.g. an existing-but-empty category, tag, author) and a 404 was not already issued, 645 * and if the request was not a search or the homepage. 646 * 647 * Otherwise, issue a 200. 648 * 649 * This sets headers after posts have been queried. handle_404() really means "handle status". 650 * By inspecting the result of querying posts, seemingly successful requests can be switched to 651 * a 404 so that canonical redirection logic can kick in. 652 * 653 * @since 2.0.0 654 * 655 * @global WP_Query $wp_query WordPress Query object. 656 */ 657 public function handle_404() { 658 global $wp_query; 659 660 /** 661 * Filters whether to short-circuit default header status handling. 662 * 663 * Returning a non-false value from the filter will short-circuit the handling 664 * and return early. 665 * 666 * @since 4.5.0 667 * 668 * @param bool $preempt Whether to short-circuit default header status handling. Default false. 669 * @param WP_Query $wp_query WordPress Query object. 670 */ 671 if ( false !== apply_filters( 'pre_handle_404', false, $wp_query ) ) { 672 return; 673 } 674 675 // If we've already issued a 404, bail. 676 if ( is_404() ) { 677 return; 678 } 679 680 $set_404 = true; 681 682 // Never 404 for the admin, robots, or favicon. 683 if ( is_admin() || is_robots() || is_favicon() ) { 684 $set_404 = false; 685 686 // If posts were found, check for paged content. 687 } elseif ( $wp_query->posts ) { 688 $content_found = true; 689 690 if ( is_singular() ) { 691 $post = isset( $wp_query->post ) ? $wp_query->post : null; 692 693 // Only set X-Pingback for single posts that allow pings. 694 if ( $post && pings_open( $post ) && ! headers_sent() ) { 695 header( 'X-Pingback: ' . get_bloginfo( 'pingback_url', 'display' ) ); 696 } 697 698 // Check for paged content that exceeds the max number of pages. 699 $next = '<!--nextpage-->'; 700 if ( $post && ! empty( $this->query_vars['page'] ) ) { 701 // Check if content is actually intended to be paged. 702 if ( false !== strpos( $post->post_content, $next ) ) { 703 $page = trim( $this->query_vars['page'], '/' ); 704 $content_found = (int) $page <= ( substr_count( $post->post_content, $next ) + 1 ); 705 } else { 706 $content_found = false; 707 } 708 } 709 } 710 711 // The posts page does not support the <!--nextpage--> pagination. 712 if ( $wp_query->is_posts_page && ! empty( $this->query_vars['page'] ) ) { 713 $content_found = false; 714 } 715 716 if ( $content_found ) { 717 $set_404 = false; 718 } 719 720 // We will 404 for paged queries, as no posts were found. 721 } elseif ( ! is_paged() ) { 722 $author = get_query_var( 'author' ); 723 724 // Don't 404 for authors without posts as long as they matched an author on this site. 725 if ( is_author() && is_numeric( $author ) && $author > 0 && is_user_member_of_blog( $author ) 726 // Don't 404 for these queries if they matched an object. 727 || ( is_tag() || is_category() || is_tax() || is_post_type_archive() ) && get_queried_object() 728 // Don't 404 for these queries either. 729 || is_home() || is_search() || is_feed() 730 ) { 731 $set_404 = false; 732 } 733 } 734 735 if ( $set_404 ) { 736 // Guess it's time to 404. 737 $wp_query->set_404(); 738 status_header( 404 ); 739 nocache_headers(); 740 } else { 741 status_header( 200 ); 742 } 743 } 744 745 /** 746 * Sets up all of the variables required by the WordPress environment. 747 * 748 * The action {@see 'wp'} has one parameter that references the WP object. It 749 * allows for accessing the properties and methods to further manipulate the 750 * object. 751 * 752 * @since 2.0.0 753 * 754 * @param string|array $query_args Passed to parse_request(). 755 */ 756 public function main( $query_args = '' ) { 757 $this->init(); 758 $this->parse_request( $query_args ); 759 $this->send_headers(); 760 $this->query_posts(); 761 $this->handle_404(); 762 $this->register_globals(); 763 764 /** 765 * Fires once the WordPress environment has been set up. 766 * 767 * @since 2.1.0 768 * 769 * @param WP $wp Current WordPress environment instance (passed by reference). 770 */ 771 do_action_ref_array( 'wp', array( &$this ) ); 772 } 773 }
title
Description
Body
title
Description
Body
title
Description
Body
title
Body
| Generated: Sat Sep 25 01:00:04 2021 | Cross-referenced by PHPXref 0.7.1 |