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PHP Cross Reference of WordPress Trunk (Updated Daily) |
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1 <?php 2 /** 3 * WordPress environment setup class. 4 * 5 * @package WordPress 6 * @since 2.0.0 7 */ 8 #[AllowDynamicProperties] 9 class WP { 10 /** 11 * Public query variables. 12 * 13 * Long list of public query variables. 14 * 15 * @since 2.0.0 16 * @var string[] 17 */ 18 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' ); 19 20 /** 21 * Private query variables. 22 * 23 * Long list of private query variables. 24 * 25 * @since 2.0.0 26 * @var string[] 27 */ 28 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' ); 29 30 /** 31 * Extra query variables set by the user. 32 * 33 * @since 2.1.0 34 * @var array 35 */ 36 public $extra_query_vars = array(); 37 38 /** 39 * Query variables for setting up the WordPress Query Loop. 40 * 41 * @since 2.0.0 42 * @var array 43 */ 44 public $query_vars = array(); 45 46 /** 47 * String parsed to set the query variables. 48 * 49 * @since 2.0.0 50 * @var string 51 */ 52 public $query_string = ''; 53 54 /** 55 * The request path, e.g. 2015/05/06. 56 * 57 * @since 2.0.0 58 * @var string 59 */ 60 public $request = ''; 61 62 /** 63 * Rewrite rule the request matched. 64 * 65 * @since 2.0.0 66 * @var string 67 */ 68 public $matched_rule = ''; 69 70 /** 71 * Rewrite query the request matched. 72 * 73 * @since 2.0.0 74 * @var string 75 */ 76 public $matched_query = ''; 77 78 /** 79 * Whether already did the permalink. 80 * 81 * @since 2.0.0 82 * @var bool 83 */ 84 public $did_permalink = false; 85 86 /** 87 * Adds a query variable to the list of public query variables. 88 * 89 * @since 2.1.0 90 * 91 * @param string $qv Query variable name. 92 */ 93 public function add_query_var( $qv ) { 94 if ( ! in_array( $qv, $this->public_query_vars, true ) ) { 95 $this->public_query_vars[] = $qv; 96 } 97 } 98 99 /** 100 * Removes a query variable from a list of public query variables. 101 * 102 * @since 4.5.0 103 * 104 * @param string $name Query variable name. 105 */ 106 public function remove_query_var( $name ) { 107 $this->public_query_vars = array_diff( $this->public_query_vars, array( $name ) ); 108 } 109 110 /** 111 * Sets the value of a query variable. 112 * 113 * @since 2.3.0 114 * 115 * @param string $key Query variable name. 116 * @param mixed $value Query variable value. 117 */ 118 public function set_query_var( $key, $value ) { 119 $this->query_vars[ $key ] = $value; 120 } 121 122 /** 123 * Parses the request to find the correct WordPress query. 124 * 125 * Sets up the query variables based on the request. There are also many 126 * filters and actions that can be used to further manipulate the result. 127 * 128 * @since 2.0.0 129 * @since 6.0.0 A return value was added. 130 * 131 * @global WP_Rewrite $wp_rewrite WordPress rewrite component. 132 * 133 * @param array|string $extra_query_vars Set the extra query variables. 134 * @return bool Whether the request was parsed. 135 */ 136 public function parse_request( $extra_query_vars = '' ) { 137 global $wp_rewrite; 138 139 /** 140 * Filters whether to parse the request. 141 * 142 * @since 3.5.0 143 * 144 * @param bool $bool Whether or not to parse the request. Default true. 145 * @param WP $wp Current WordPress environment instance. 146 * @param array|string $extra_query_vars Extra passed query variables. 147 */ 148 if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) ) { 149 return false; 150 } 151 152 $this->query_vars = array(); 153 $post_type_query_vars = array(); 154 155 if ( is_array( $extra_query_vars ) ) { 156 $this->extra_query_vars = & $extra_query_vars; 157 } elseif ( ! empty( $extra_query_vars ) ) { 158 parse_str( $extra_query_vars, $this->extra_query_vars ); 159 } 160 // Process PATH_INFO, REQUEST_URI, and 404 for permalinks. 161 162 // Fetch the rewrite rules. 163 $rewrite = $wp_rewrite->wp_rewrite_rules(); 164 165 if ( ! empty( $rewrite ) ) { 166 // If we match a rewrite rule, this will be cleared. 167 $error = '404'; 168 $this->did_permalink = true; 169 170 $pathinfo = isset( $_SERVER['PATH_INFO'] ) ? $_SERVER['PATH_INFO'] : ''; 171 list( $pathinfo ) = explode( '?', $pathinfo ); 172 $pathinfo = str_replace( '%', '%25', $pathinfo ); 173 174 list( $req_uri ) = explode( '?', $_SERVER['REQUEST_URI'] ); 175 $self = $_SERVER['PHP_SELF']; 176 177 $home_path = parse_url( home_url(), PHP_URL_PATH ); 178 $home_path_regex = ''; 179 if ( is_string( $home_path ) && '' !== $home_path ) { 180 $home_path = trim( $home_path, '/' ); 181 $home_path_regex = sprintf( '|^%s|i', preg_quote( $home_path, '|' ) ); 182 } 183 184 /* 185 * Trim path info from the end and the leading home path from the front. 186 * For path info requests, this leaves us with the requesting filename, if any. 187 * For 404 requests, this leaves us with the requested permalink. 188 */ 189 $req_uri = str_replace( $pathinfo, '', $req_uri ); 190 $req_uri = trim( $req_uri, '/' ); 191 $pathinfo = trim( $pathinfo, '/' ); 192 $self = trim( $self, '/' ); 193 194 if ( ! empty( $home_path_regex ) ) { 195 $req_uri = preg_replace( $home_path_regex, '', $req_uri ); 196 $req_uri = trim( $req_uri, '/' ); 197 $pathinfo = preg_replace( $home_path_regex, '', $pathinfo ); 198 $pathinfo = trim( $pathinfo, '/' ); 199 $self = preg_replace( $home_path_regex, '', $self ); 200 $self = trim( $self, '/' ); 201 } 202 203 // The requested permalink is in $pathinfo for path info requests and $req_uri for other requests. 204 if ( ! empty( $pathinfo ) && ! preg_match( '|^.*' . $wp_rewrite->index . '$|', $pathinfo ) ) { 205 $requested_path = $pathinfo; 206 } else { 207 // If the request uri is the index, blank it out so that we don't try to match it against a rule. 208 if ( $req_uri === $wp_rewrite->index ) { 209 $req_uri = ''; 210 } 211 212 $requested_path = $req_uri; 213 } 214 215 $requested_file = $req_uri; 216 217 $this->request = $requested_path; 218 219 // Look for matches. 220 $request_match = $requested_path; 221 if ( empty( $request_match ) ) { 222 // An empty request could only match against ^$ regex. 223 if ( isset( $rewrite['$'] ) ) { 224 $this->matched_rule = '$'; 225 $query = $rewrite['$']; 226 $matches = array( '' ); 227 } 228 } else { 229 foreach ( (array) $rewrite as $match => $query ) { 230 // If the requested file is the anchor of the match, prepend it to the path info. 231 if ( ! empty( $requested_file ) 232 && str_starts_with( $match, $requested_file ) 233 && $requested_file !== $requested_path 234 ) { 235 $request_match = $requested_file . '/' . $requested_path; 236 } 237 238 if ( preg_match( "#^$match#", $request_match, $matches ) 239 || preg_match( "#^$match#", urldecode( $request_match ), $matches ) 240 ) { 241 242 if ( $wp_rewrite->use_verbose_page_rules 243 && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) 244 ) { 245 // This is a verbose page match, let's check to be sure about it. 246 $page = get_page_by_path( $matches[ $varmatch[1] ] ); 247 248 if ( ! $page ) { 249 continue; 250 } 251 252 $post_status_obj = get_post_status_object( $page->post_status ); 253 254 if ( ! $post_status_obj->public && ! $post_status_obj->protected 255 && ! $post_status_obj->private && $post_status_obj->exclude_from_search 256 ) { 257 continue; 258 } 259 } 260 261 // Got a match. 262 $this->matched_rule = $match; 263 break; 264 } 265 } 266 } 267 268 if ( ! empty( $this->matched_rule ) ) { 269 // Trim the query of everything up to the '?'. 270 $query = preg_replace( '!^.+\?!', '', $query ); 271 272 // Substitute the substring matches into the query. 273 $query = addslashes( WP_MatchesMapRegex::apply( $query, $matches ) ); 274 275 $this->matched_query = $query; 276 277 // Parse the query. 278 parse_str( $query, $perma_query_vars ); 279 280 // If we're processing a 404 request, clear the error var since we found something. 281 if ( '404' === $error ) { 282 unset( $error, $_GET['error'] ); 283 } 284 } 285 286 // If req_uri is empty or if it is a request for ourself, unset error. 287 if ( empty( $requested_path ) || $requested_file === $self 288 || str_contains( $_SERVER['PHP_SELF'], 'wp-admin/' ) 289 ) { 290 unset( $error, $_GET['error'] ); 291 292 if ( isset( $perma_query_vars ) && str_contains( $_SERVER['PHP_SELF'], 'wp-admin/' ) ) { 293 unset( $perma_query_vars ); 294 } 295 296 $this->did_permalink = false; 297 } 298 } 299 300 /** 301 * Filters the query variables allowed before processing. 302 * 303 * Allows (publicly allowed) query vars to be added, removed, or changed prior 304 * to executing the query. Needed to allow custom rewrite rules using your own arguments 305 * to work, or any other custom query variables you want to be publicly available. 306 * 307 * @since 1.5.0 308 * 309 * @param string[] $public_query_vars The array of allowed query variable names. 310 */ 311 $this->public_query_vars = apply_filters( 'query_vars', $this->public_query_vars ); 312 313 foreach ( get_post_types( array(), 'objects' ) as $post_type => $t ) { 314 if ( is_post_type_viewable( $t ) && $t->query_var ) { 315 $post_type_query_vars[ $t->query_var ] = $post_type; 316 } 317 } 318 319 foreach ( $this->public_query_vars as $wpvar ) { 320 if ( isset( $this->extra_query_vars[ $wpvar ] ) ) { 321 $this->query_vars[ $wpvar ] = $this->extra_query_vars[ $wpvar ]; 322 } elseif ( isset( $_GET[ $wpvar ] ) && isset( $_POST[ $wpvar ] ) 323 && $_GET[ $wpvar ] !== $_POST[ $wpvar ] 324 ) { 325 wp_die( 326 __( 'A variable mismatch has been detected.' ), 327 __( 'Sorry, you are not allowed to view this item.' ), 328 400 329 ); 330 } elseif ( isset( $_POST[ $wpvar ] ) ) { 331 $this->query_vars[ $wpvar ] = $_POST[ $wpvar ]; 332 } elseif ( isset( $_GET[ $wpvar ] ) ) { 333 $this->query_vars[ $wpvar ] = $_GET[ $wpvar ]; 334 } elseif ( isset( $perma_query_vars[ $wpvar ] ) ) { 335 $this->query_vars[ $wpvar ] = $perma_query_vars[ $wpvar ]; 336 } 337 338 if ( ! empty( $this->query_vars[ $wpvar ] ) ) { 339 if ( ! is_array( $this->query_vars[ $wpvar ] ) ) { 340 $this->query_vars[ $wpvar ] = (string) $this->query_vars[ $wpvar ]; 341 } else { 342 foreach ( $this->query_vars[ $wpvar ] as $vkey => $v ) { 343 if ( is_scalar( $v ) ) { 344 $this->query_vars[ $wpvar ][ $vkey ] = (string) $v; 345 } 346 } 347 } 348 349 if ( isset( $post_type_query_vars[ $wpvar ] ) ) { 350 $this->query_vars['post_type'] = $post_type_query_vars[ $wpvar ]; 351 $this->query_vars['name'] = $this->query_vars[ $wpvar ]; 352 } 353 } 354 } 355 356 // Convert urldecoded spaces back into '+'. 357 foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy => $t ) { 358 if ( $t->query_var && isset( $this->query_vars[ $t->query_var ] ) ) { 359 $this->query_vars[ $t->query_var ] = str_replace( ' ', '+', $this->query_vars[ $t->query_var ] ); 360 } 361 } 362 363 // Don't allow non-publicly queryable taxonomies to be queried from the front end. 364 if ( ! is_admin() ) { 365 foreach ( get_taxonomies( array( 'publicly_queryable' => false ), 'objects' ) as $taxonomy => $t ) { 366 /* 367 * Disallow when set to the 'taxonomy' query var. 368 * Non-publicly queryable taxonomies cannot register custom query vars. See register_taxonomy(). 369 */ 370 if ( isset( $this->query_vars['taxonomy'] ) && $taxonomy === $this->query_vars['taxonomy'] ) { 371 unset( $this->query_vars['taxonomy'], $this->query_vars['term'] ); 372 } 373 } 374 } 375 376 // Limit publicly queried post_types to those that are 'publicly_queryable'. 377 if ( isset( $this->query_vars['post_type'] ) ) { 378 $queryable_post_types = get_post_types( array( 'publicly_queryable' => true ) ); 379 380 if ( ! is_array( $this->query_vars['post_type'] ) ) { 381 if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types, true ) ) { 382 unset( $this->query_vars['post_type'] ); 383 } 384 } else { 385 $this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types ); 386 } 387 } 388 389 // Resolve conflicts between posts with numeric slugs and date archive queries. 390 $this->query_vars = wp_resolve_numeric_slug_conflicts( $this->query_vars ); 391 392 foreach ( (array) $this->private_query_vars as $var ) { 393 if ( isset( $this->extra_query_vars[ $var ] ) ) { 394 $this->query_vars[ $var ] = $this->extra_query_vars[ $var ]; 395 } 396 } 397 398 if ( isset( $error ) ) { 399 $this->query_vars['error'] = $error; 400 } 401 402 /** 403 * Filters the array of parsed query variables. 404 * 405 * @since 2.1.0 406 * 407 * @param array $query_vars The array of requested query variables. 408 */ 409 $this->query_vars = apply_filters( 'request', $this->query_vars ); 410 411 /** 412 * Fires once all query variables for the current request have been parsed. 413 * 414 * @since 2.1.0 415 * 416 * @param WP $wp Current WordPress environment instance (passed by reference). 417 */ 418 do_action_ref_array( 'parse_request', array( &$this ) ); 419 420 return true; 421 } 422 423 /** 424 * Sends additional HTTP headers for caching, content type, etc. 425 * 426 * Sets the Content-Type header. Sets the 'error' status (if passed) and optionally exits. 427 * If showing a feed, it will also send Last-Modified, ETag, and 304 status if needed. 428 * 429 * @since 2.0.0 430 * @since 4.4.0 `X-Pingback` header is added conditionally for single posts that allow pings. 431 * @since 6.1.0 Runs after posts have been queried. 432 * 433 * @global WP_Query $wp_query WordPress Query object. 434 */ 435 public function send_headers() { 436 global $wp_query; 437 438 $headers = array(); 439 $status = null; 440 $exit_required = false; 441 $date_format = 'D, d M Y H:i:s'; 442 443 if ( is_user_logged_in() ) { 444 $headers = array_merge( $headers, wp_get_nocache_headers() ); 445 } elseif ( ! empty( $_GET['unapproved'] ) && ! empty( $_GET['moderation-hash'] ) ) { 446 // Unmoderated comments are only visible for 10 minutes via the moderation hash. 447 $expires = 10 * MINUTE_IN_SECONDS; 448 449 $headers['Expires'] = gmdate( $date_format, time() + $expires ); 450 $headers['Cache-Control'] = sprintf( 451 'max-age=%d, must-revalidate', 452 $expires 453 ); 454 } 455 if ( ! empty( $this->query_vars['error'] ) ) { 456 $status = (int) $this->query_vars['error']; 457 458 if ( 404 === $status ) { 459 if ( ! is_user_logged_in() ) { 460 $headers = array_merge( $headers, wp_get_nocache_headers() ); 461 } 462 463 $headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' ); 464 } elseif ( in_array( $status, array( 403, 500, 502, 503 ), true ) ) { 465 $exit_required = true; 466 } 467 } elseif ( empty( $this->query_vars['feed'] ) ) { 468 $headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' ); 469 } else { 470 // Set the correct content type for feeds. 471 $type = $this->query_vars['feed']; 472 if ( 'feed' === $this->query_vars['feed'] ) { 473 $type = get_default_feed(); 474 } 475 476 $headers['Content-Type'] = feed_content_type( $type ) . '; charset=' . get_option( 'blog_charset' ); 477 478 // We're showing a feed, so WP is indeed the only thing that last changed. 479 if ( ! empty( $this->query_vars['withcomments'] ) 480 || str_contains( $this->query_vars['feed'], 'comments-' ) 481 || ( empty( $this->query_vars['withoutcomments'] ) 482 && ( ! empty( $this->query_vars['p'] ) 483 || ! empty( $this->query_vars['name'] ) 484 || ! empty( $this->query_vars['page_id'] ) 485 || ! empty( $this->query_vars['pagename'] ) 486 || ! empty( $this->query_vars['attachment'] ) 487 || ! empty( $this->query_vars['attachment_id'] ) 488 ) 489 ) 490 ) { 491 $wp_last_modified_post = mysql2date( $date_format, get_lastpostmodified( 'GMT' ), false ); 492 $wp_last_modified_comment = mysql2date( $date_format, get_lastcommentmodified( 'GMT' ), false ); 493 494 if ( strtotime( $wp_last_modified_post ) > strtotime( $wp_last_modified_comment ) ) { 495 $wp_last_modified = $wp_last_modified_post; 496 } else { 497 $wp_last_modified = $wp_last_modified_comment; 498 } 499 } else { 500 $wp_last_modified = mysql2date( $date_format, get_lastpostmodified( 'GMT' ), false ); 501 } 502 503 if ( ! $wp_last_modified ) { 504 $wp_last_modified = gmdate( $date_format ); 505 } 506 507 $wp_last_modified .= ' GMT'; 508 $wp_etag = '"' . md5( $wp_last_modified ) . '"'; 509 510 $headers['Last-Modified'] = $wp_last_modified; 511 $headers['ETag'] = $wp_etag; 512 513 // Support for conditional GET. 514 if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ) { 515 $client_etag = wp_unslash( $_SERVER['HTTP_IF_NONE_MATCH'] ); 516 } else { 517 $client_etag = ''; 518 } 519 520 if ( isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) { 521 $client_last_modified = trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ); 522 } else { 523 $client_last_modified = ''; 524 } 525 526 // If string is empty, return 0. If not, attempt to parse into a timestamp. 527 $client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0; 528 529 // Make a timestamp for our most recent modification. 530 $wp_modified_timestamp = strtotime( $wp_last_modified ); 531 532 if ( ( $client_last_modified && $client_etag ) 533 ? ( ( $client_modified_timestamp >= $wp_modified_timestamp ) && ( $client_etag === $wp_etag ) ) 534 : ( ( $client_modified_timestamp >= $wp_modified_timestamp ) || ( $client_etag === $wp_etag ) ) 535 ) { 536 $status = 304; 537 $exit_required = true; 538 } 539 } 540 541 if ( is_singular() ) { 542 $post = isset( $wp_query->post ) ? $wp_query->post : null; 543 544 // Only set X-Pingback for single posts that allow pings. 545 if ( $post && pings_open( $post ) ) { 546 $headers['X-Pingback'] = get_bloginfo( 'pingback_url', 'display' ); 547 } 548 549 // Send nocache headers for password protected posts to avoid unwanted caching. 550 if ( ! empty( $post->post_password ) ) { 551 $headers = array_merge( $headers, wp_get_nocache_headers() ); 552 } 553 } 554 555 /** 556 * Filters the HTTP headers before they're sent to the browser. 557 * 558 * @since 2.8.0 559 * 560 * @param string[] $headers Associative array of headers to be sent. 561 * @param WP $wp Current WordPress environment instance. 562 */ 563 $headers = apply_filters( 'wp_headers', $headers, $this ); 564 565 if ( ! empty( $status ) ) { 566 status_header( $status ); 567 } 568 569 // If Last-Modified is set to false, it should not be sent (no-cache situation). 570 if ( isset( $headers['Last-Modified'] ) && false === $headers['Last-Modified'] ) { 571 unset( $headers['Last-Modified'] ); 572 573 if ( ! headers_sent() ) { 574 header_remove( 'Last-Modified' ); 575 } 576 } 577 578 if ( ! headers_sent() ) { 579 foreach ( (array) $headers as $name => $field_value ) { 580 header( "{$name}: {$field_value}" ); 581 } 582 } 583 584 if ( $exit_required ) { 585 exit; 586 } 587 588 /** 589 * Fires once the requested HTTP headers for caching, content type, etc. have been sent. 590 * 591 * @since 2.1.0 592 * 593 * @param WP $wp Current WordPress environment instance (passed by reference). 594 */ 595 do_action_ref_array( 'send_headers', array( &$this ) ); 596 } 597 598 /** 599 * Sets the query string property based off of the query variable property. 600 * 601 * The {@see 'query_string'} filter is deprecated, but still works. Plugins should 602 * use the {@see 'request'} filter instead. 603 * 604 * @since 2.0.0 605 */ 606 public function build_query_string() { 607 $this->query_string = ''; 608 609 foreach ( (array) array_keys( $this->query_vars ) as $wpvar ) { 610 if ( '' !== $this->query_vars[ $wpvar ] ) { 611 $this->query_string .= ( strlen( $this->query_string ) < 1 ) ? '' : '&'; 612 613 if ( ! is_scalar( $this->query_vars[ $wpvar ] ) ) { // Discard non-scalars. 614 continue; 615 } 616 617 $this->query_string .= $wpvar . '=' . rawurlencode( $this->query_vars[ $wpvar ] ); 618 } 619 } 620 621 if ( has_filter( 'query_string' ) ) { // Don't bother filtering and parsing if no plugins are hooked in. 622 /** 623 * Filters the query string before parsing. 624 * 625 * @since 1.5.0 626 * @deprecated 2.1.0 Use {@see 'query_vars'} or {@see 'request'} filters instead. 627 * 628 * @param string $query_string The query string to modify. 629 */ 630 $this->query_string = apply_filters_deprecated( 631 'query_string', 632 array( $this->query_string ), 633 '2.1.0', 634 'query_vars, request' 635 ); 636 637 parse_str( $this->query_string, $this->query_vars ); 638 } 639 } 640 641 /** 642 * Set up the WordPress Globals. 643 * 644 * The query_vars property will be extracted to the GLOBALS. So care should 645 * be taken when naming global variables that might interfere with the 646 * WordPress environment. 647 * 648 * @since 2.0.0 649 * 650 * @global WP_Query $wp_query WordPress Query object. 651 * @global string $query_string Query string for the loop. 652 * @global array $posts The found posts. 653 * @global WP_Post|null $post The current post, if available. 654 * @global string $request The SQL statement for the request. 655 * @global int $more Only set, if single page or post. 656 * @global int $single If single page or post. Only set, if single page or post. 657 * @global WP_User $authordata Only set, if author archive. 658 */ 659 public function register_globals() { 660 global $wp_query; 661 662 // Extract updated query vars back into global namespace. 663 foreach ( (array) $wp_query->query_vars as $key => $value ) { 664 $GLOBALS[ $key ] = $value; 665 } 666 667 $GLOBALS['query_string'] = $this->query_string; 668 $GLOBALS['posts'] = & $wp_query->posts; 669 $GLOBALS['post'] = isset( $wp_query->post ) ? $wp_query->post : null; 670 $GLOBALS['request'] = $wp_query->request; 671 672 if ( $wp_query->is_single() || $wp_query->is_page() ) { 673 $GLOBALS['more'] = 1; 674 $GLOBALS['single'] = 1; 675 } 676 677 if ( $wp_query->is_author() ) { 678 $GLOBALS['authordata'] = get_userdata( get_queried_object_id() ); 679 } 680 } 681 682 /** 683 * Set up the current user. 684 * 685 * @since 2.0.0 686 */ 687 public function init() { 688 wp_get_current_user(); 689 } 690 691 /** 692 * Set up the Loop based on the query variables. 693 * 694 * @since 2.0.0 695 * 696 * @global WP_Query $wp_the_query WordPress Query object. 697 */ 698 public function query_posts() { 699 global $wp_the_query; 700 $this->build_query_string(); 701 $wp_the_query->query( $this->query_vars ); 702 } 703 704 /** 705 * Set the Headers for 404, if nothing is found for requested URL. 706 * 707 * Issue a 404 if a request doesn't match any posts and doesn't match any object 708 * (e.g. an existing-but-empty category, tag, author) and a 404 was not already issued, 709 * and if the request was not a search or the homepage. 710 * 711 * Otherwise, issue a 200. 712 * 713 * This sets headers after posts have been queried. handle_404() really means "handle status". 714 * By inspecting the result of querying posts, seemingly successful requests can be switched to 715 * a 404 so that canonical redirection logic can kick in. 716 * 717 * @since 2.0.0 718 * 719 * @global WP_Query $wp_query WordPress Query object. 720 */ 721 public function handle_404() { 722 global $wp_query; 723 724 /** 725 * Filters whether to short-circuit default header status handling. 726 * 727 * Returning a non-false value from the filter will short-circuit the handling 728 * and return early. 729 * 730 * @since 4.5.0 731 * 732 * @param bool $preempt Whether to short-circuit default header status handling. Default false. 733 * @param WP_Query $wp_query WordPress Query object. 734 */ 735 if ( false !== apply_filters( 'pre_handle_404', false, $wp_query ) ) { 736 return; 737 } 738 739 // If we've already issued a 404, bail. 740 if ( is_404() ) { 741 return; 742 } 743 744 $set_404 = true; 745 746 // Never 404 for the admin, robots, or favicon. 747 if ( is_admin() || is_robots() || is_favicon() ) { 748 $set_404 = false; 749 750 // If posts were found, check for paged content. 751 } elseif ( $wp_query->posts ) { 752 $content_found = true; 753 754 if ( is_singular() ) { 755 $post = isset( $wp_query->post ) ? $wp_query->post : null; 756 $next = '<!--nextpage-->'; 757 758 // Check for paged content that exceeds the max number of pages. 759 if ( $post && ! empty( $this->query_vars['page'] ) ) { 760 // Check if content is actually intended to be paged. 761 if ( str_contains( $post->post_content, $next ) ) { 762 $page = trim( $this->query_vars['page'], '/' ); 763 $content_found = (int) $page <= ( substr_count( $post->post_content, $next ) + 1 ); 764 } else { 765 $content_found = false; 766 } 767 } 768 } 769 770 // The posts page does not support the <!--nextpage--> pagination. 771 if ( $wp_query->is_posts_page && ! empty( $this->query_vars['page'] ) ) { 772 $content_found = false; 773 } 774 775 if ( $content_found ) { 776 $set_404 = false; 777 } 778 779 // We will 404 for paged queries, as no posts were found. 780 } elseif ( ! is_paged() ) { 781 $author = get_query_var( 'author' ); 782 783 // Don't 404 for authors without posts as long as they matched an author on this site. 784 if ( is_author() && is_numeric( $author ) && $author > 0 && is_user_member_of_blog( $author ) 785 // Don't 404 for these queries if they matched an object. 786 || ( is_tag() || is_category() || is_tax() || is_post_type_archive() ) && get_queried_object() 787 // Don't 404 for these queries either. 788 || is_home() || is_search() || is_feed() 789 ) { 790 $set_404 = false; 791 } 792 } 793 794 if ( $set_404 ) { 795 // Guess it's time to 404. 796 $wp_query->set_404(); 797 status_header( 404 ); 798 nocache_headers(); 799 } else { 800 status_header( 200 ); 801 } 802 } 803 804 /** 805 * Sets up all of the variables required by the WordPress environment. 806 * 807 * The action {@see 'wp'} has one parameter that references the WP object. It 808 * allows for accessing the properties and methods to further manipulate the 809 * object. 810 * 811 * @since 2.0.0 812 * 813 * @param string|array $query_args Passed to parse_request(). 814 */ 815 public function main( $query_args = '' ) { 816 $this->init(); 817 818 $parsed = $this->parse_request( $query_args ); 819 820 if ( $parsed ) { 821 $this->query_posts(); 822 $this->handle_404(); 823 $this->register_globals(); 824 } 825 826 $this->send_headers(); 827 828 /** 829 * Fires once the WordPress environment has been set up. 830 * 831 * @since 2.1.0 832 * 833 * @param WP $wp Current WordPress environment instance (passed by reference). 834 */ 835 do_action_ref_array( 'wp', array( &$this ) ); 836 } 837 }
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