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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', 'static', 'pagename', 'page_id', 'error', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', '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 * Add name to 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 ) ) { 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 * Set 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 * Parse request to find 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 $this 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 $home_path = trim( parse_url( home_url(), PHP_URL_PATH ), '/' ); 174 $home_path_regex = sprintf( '|^%s|i', preg_quote( $home_path, '|' ) ); 175 176 // Trim path info from the end and the leading home path from the 177 // front. For path info requests, this leaves us with the requesting 178 // filename, if any. For 404 requests, this leaves us with the 179 // requested permalink. 180 $req_uri = str_replace( $pathinfo, '', $req_uri ); 181 $req_uri = trim( $req_uri, '/' ); 182 $req_uri = preg_replace( $home_path_regex, '', $req_uri ); 183 $req_uri = trim( $req_uri, '/' ); 184 $pathinfo = trim( $pathinfo, '/' ); 185 $pathinfo = preg_replace( $home_path_regex, '', $pathinfo ); 186 $pathinfo = trim( $pathinfo, '/' ); 187 $self = trim( $self, '/' ); 188 $self = preg_replace( $home_path_regex, '', $self ); 189 $self = trim( $self, '/' ); 190 191 // The requested permalink is in $pathinfo for path info requests and 192 // $req_uri for other requests. 193 if ( ! empty( $pathinfo ) && ! preg_match( '|^.*' . $wp_rewrite->index . '$|', $pathinfo ) ) { 194 $requested_path = $pathinfo; 195 } else { 196 // If the request uri is the index, blank it out so that we don't try to match it against a rule. 197 if ( $req_uri == $wp_rewrite->index ) { 198 $req_uri = ''; 199 } 200 $requested_path = $req_uri; 201 } 202 $requested_file = $req_uri; 203 204 $this->request = $requested_path; 205 206 // Look for matches. 207 $request_match = $requested_path; 208 if ( empty( $request_match ) ) { 209 // An empty request could only match against ^$ regex 210 if ( isset( $rewrite['$'] ) ) { 211 $this->matched_rule = '$'; 212 $query = $rewrite['$']; 213 $matches = array( '' ); 214 } 215 } else { 216 foreach ( (array) $rewrite as $match => $query ) { 217 // If the requested file is the anchor of the match, prepend it to the path info. 218 if ( ! empty( $requested_file ) && strpos( $match, $requested_file ) === 0 && $requested_file != $requested_path ) { 219 $request_match = $requested_file . '/' . $requested_path; 220 } 221 222 if ( preg_match( "#^$match#", $request_match, $matches ) || 223 preg_match( "#^$match#", urldecode( $request_match ), $matches ) ) { 224 225 if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) { 226 // This is a verbose page match, let's check to be sure about it. 227 $page = get_page_by_path( $matches[ $varmatch[1] ] ); 228 if ( ! $page ) { 229 continue; 230 } 231 232 $post_status_obj = get_post_status_object( $page->post_status ); 233 if ( ! $post_status_obj->public && ! $post_status_obj->protected 234 && ! $post_status_obj->private && $post_status_obj->exclude_from_search ) { 235 continue; 236 } 237 } 238 239 // Got a match. 240 $this->matched_rule = $match; 241 break; 242 } 243 } 244 } 245 246 if ( isset( $this->matched_rule ) ) { 247 // Trim the query of everything up to the '?'. 248 $query = preg_replace( '!^.+\?!', '', $query ); 249 250 // Substitute the substring matches into the query. 251 $query = addslashes( WP_MatchesMapRegex::apply( $query, $matches ) ); 252 253 $this->matched_query = $query; 254 255 // Parse the query. 256 parse_str( $query, $perma_query_vars ); 257 258 // If we're processing a 404 request, clear the error var since we found something. 259 if ( '404' == $error ) { 260 unset( $error, $_GET['error'] ); 261 } 262 } 263 264 // If req_uri is empty or if it is a request for ourself, unset error. 265 if ( empty( $requested_path ) || $requested_file == $self || strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) { 266 unset( $error, $_GET['error'] ); 267 268 if ( isset( $perma_query_vars ) && strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) { 269 unset( $perma_query_vars ); 270 } 271 272 $this->did_permalink = false; 273 } 274 } 275 276 /** 277 * Filters the query variables whitelist before processing. 278 * 279 * Allows (publicly allowed) query vars to be added, removed, or changed prior 280 * to executing the query. Needed to allow custom rewrite rules using your own arguments 281 * to work, or any other custom query variables you want to be publicly available. 282 * 283 * @since 1.5.0 284 * 285 * @param string[] $public_query_vars The array of whitelisted query variable names. 286 */ 287 $this->public_query_vars = apply_filters( 'query_vars', $this->public_query_vars ); 288 289 foreach ( get_post_types( array(), 'objects' ) as $post_type => $t ) { 290 if ( is_post_type_viewable( $t ) && $t->query_var ) { 291 $post_type_query_vars[ $t->query_var ] = $post_type; 292 } 293 } 294 295 foreach ( $this->public_query_vars as $wpvar ) { 296 if ( isset( $this->extra_query_vars[ $wpvar ] ) ) { 297 $this->query_vars[ $wpvar ] = $this->extra_query_vars[ $wpvar ]; 298 } elseif ( isset( $_GET[ $wpvar ] ) && isset( $_POST[ $wpvar ] ) && $_GET[ $wpvar ] !== $_POST[ $wpvar ] ) { 299 wp_die( __( 'A variable mismatch has been detected.' ), __( 'Sorry, you are not allowed to view this item.' ), 400 ); 300 } elseif ( isset( $_POST[ $wpvar ] ) ) { 301 $this->query_vars[ $wpvar ] = $_POST[ $wpvar ]; 302 } elseif ( isset( $_GET[ $wpvar ] ) ) { 303 $this->query_vars[ $wpvar ] = $_GET[ $wpvar ]; 304 } elseif ( isset( $perma_query_vars[ $wpvar ] ) ) { 305 $this->query_vars[ $wpvar ] = $perma_query_vars[ $wpvar ]; 306 } 307 308 if ( ! empty( $this->query_vars[ $wpvar ] ) ) { 309 if ( ! is_array( $this->query_vars[ $wpvar ] ) ) { 310 $this->query_vars[ $wpvar ] = (string) $this->query_vars[ $wpvar ]; 311 } else { 312 foreach ( $this->query_vars[ $wpvar ] as $vkey => $v ) { 313 if ( is_scalar( $v ) ) { 314 $this->query_vars[ $wpvar ][ $vkey ] = (string) $v; 315 } 316 } 317 } 318 319 if ( isset( $post_type_query_vars[ $wpvar ] ) ) { 320 $this->query_vars['post_type'] = $post_type_query_vars[ $wpvar ]; 321 $this->query_vars['name'] = $this->query_vars[ $wpvar ]; 322 } 323 } 324 } 325 326 // Convert urldecoded spaces back into + 327 foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy => $t ) { 328 if ( $t->query_var && isset( $this->query_vars[ $t->query_var ] ) ) { 329 $this->query_vars[ $t->query_var ] = str_replace( ' ', '+', $this->query_vars[ $t->query_var ] ); 330 } 331 } 332 333 // Don't allow non-publicly queryable taxonomies to be queried from the front end. 334 if ( ! is_admin() ) { 335 foreach ( get_taxonomies( array( 'publicly_queryable' => false ), 'objects' ) as $taxonomy => $t ) { 336 /* 337 * Disallow when set to the 'taxonomy' query var. 338 * Non-publicly queryable taxonomies cannot register custom query vars. See register_taxonomy(). 339 */ 340 if ( isset( $this->query_vars['taxonomy'] ) && $taxonomy === $this->query_vars['taxonomy'] ) { 341 unset( $this->query_vars['taxonomy'], $this->query_vars['term'] ); 342 } 343 } 344 } 345 346 // Limit publicly queried post_types to those that are publicly_queryable 347 if ( isset( $this->query_vars['post_type'] ) ) { 348 $queryable_post_types = get_post_types( array( 'publicly_queryable' => true ) ); 349 if ( ! is_array( $this->query_vars['post_type'] ) ) { 350 if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types ) ) { 351 unset( $this->query_vars['post_type'] ); 352 } 353 } else { 354 $this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types ); 355 } 356 } 357 358 // Resolve conflicts between posts with numeric slugs and date archive queries. 359 $this->query_vars = wp_resolve_numeric_slug_conflicts( $this->query_vars ); 360 361 foreach ( (array) $this->private_query_vars as $var ) { 362 if ( isset( $this->extra_query_vars[ $var ] ) ) { 363 $this->query_vars[ $var ] = $this->extra_query_vars[ $var ]; 364 } 365 } 366 367 if ( isset( $error ) ) { 368 $this->query_vars['error'] = $error; 369 } 370 371 /** 372 * Filters the array of parsed query variables. 373 * 374 * @since 2.1.0 375 * 376 * @param array $query_vars The array of requested query variables. 377 */ 378 $this->query_vars = apply_filters( 'request', $this->query_vars ); 379 380 /** 381 * Fires once all query variables for the current request have been parsed. 382 * 383 * @since 2.1.0 384 * 385 * @param WP $this Current WordPress environment instance (passed by reference). 386 */ 387 do_action_ref_array( 'parse_request', array( &$this ) ); 388 } 389 390 /** 391 * Sends additional HTTP headers for caching, content type, etc. 392 * 393 * Sets the Content-Type header. Sets the 'error' status (if passed) and optionally exits. 394 * If showing a feed, it will also send Last-Modified, ETag, and 304 status if needed. 395 * 396 * @since 2.0.0 397 * @since 4.4.0 `X-Pingback` header is added conditionally after posts have been queried in handle_404(). 398 */ 399 public function send_headers() { 400 $headers = array(); 401 $status = null; 402 $exit_required = false; 403 404 if ( is_user_logged_in() ) { 405 $headers = array_merge( $headers, wp_get_nocache_headers() ); 406 } 407 if ( ! empty( $this->query_vars['error'] ) ) { 408 $status = (int) $this->query_vars['error']; 409 if ( 404 === $status ) { 410 if ( ! is_user_logged_in() ) { 411 $headers = array_merge( $headers, wp_get_nocache_headers() ); 412 } 413 $headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' ); 414 } elseif ( in_array( $status, array( 403, 500, 502, 503 ) ) ) { 415 $exit_required = true; 416 } 417 } elseif ( empty( $this->query_vars['feed'] ) ) { 418 $headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' ); 419 } else { 420 // Set the correct content type for feeds 421 $type = $this->query_vars['feed']; 422 if ( 'feed' == $this->query_vars['feed'] ) { 423 $type = get_default_feed(); 424 } 425 $headers['Content-Type'] = feed_content_type( $type ) . '; charset=' . get_option( 'blog_charset' ); 426 427 // We're showing a feed, so WP is indeed the only thing that last changed. 428 if ( ! empty( $this->query_vars['withcomments'] ) 429 || false !== strpos( $this->query_vars['feed'], 'comments-' ) 430 || ( empty( $this->query_vars['withoutcomments'] ) 431 && ( ! empty( $this->query_vars['p'] ) 432 || ! empty( $this->query_vars['name'] ) 433 || ! empty( $this->query_vars['page_id'] ) 434 || ! empty( $this->query_vars['pagename'] ) 435 || ! empty( $this->query_vars['attachment'] ) 436 || ! empty( $this->query_vars['attachment_id'] ) 437 ) 438 ) 439 ) { 440 $wp_last_modified = mysql2date( 'D, d M Y H:i:s', get_lastcommentmodified( 'GMT' ), false ); 441 } else { 442 $wp_last_modified = mysql2date( 'D, d M Y H:i:s', get_lastpostmodified( 'GMT' ), false ); 443 } 444 445 if ( ! $wp_last_modified ) { 446 $wp_last_modified = gmdate( 'D, d M Y H:i:s' ); 447 } 448 449 $wp_last_modified .= ' GMT'; 450 451 $wp_etag = '"' . md5( $wp_last_modified ) . '"'; 452 $headers['Last-Modified'] = $wp_last_modified; 453 $headers['ETag'] = $wp_etag; 454 455 // Support for Conditional GET 456 if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ) { 457 $client_etag = wp_unslash( $_SERVER['HTTP_IF_NONE_MATCH'] ); 458 } else { 459 $client_etag = false; 460 } 461 462 $client_last_modified = empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ? '' : trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ); 463 // If string is empty, return 0. If not, attempt to parse into a timestamp 464 $client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0; 465 466 // Make a timestamp for our most recent modification... 467 $wp_modified_timestamp = strtotime( $wp_last_modified ); 468 469 if ( ( $client_last_modified && $client_etag ) ? 470 ( ( $client_modified_timestamp >= $wp_modified_timestamp ) && ( $client_etag == $wp_etag ) ) : 471 ( ( $client_modified_timestamp >= $wp_modified_timestamp ) || ( $client_etag == $wp_etag ) ) ) { 472 $status = 304; 473 $exit_required = true; 474 } 475 } 476 477 /** 478 * Filters the HTTP headers before they're sent to the browser. 479 * 480 * @since 2.8.0 481 * 482 * @param string[] $headers Associative array of headers to be sent. 483 * @param WP $this Current WordPress environment instance. 484 */ 485 $headers = apply_filters( 'wp_headers', $headers, $this ); 486 487 if ( ! empty( $status ) ) { 488 status_header( $status ); 489 } 490 491 // If Last-Modified is set to false, it should not be sent (no-cache situation). 492 if ( isset( $headers['Last-Modified'] ) && false === $headers['Last-Modified'] ) { 493 unset( $headers['Last-Modified'] ); 494 495 if ( ! headers_sent() ) { 496 header_remove( 'Last-Modified' ); 497 } 498 } 499 500 if ( ! headers_sent() ) { 501 foreach ( (array) $headers as $name => $field_value ) { 502 header( "{$name}: {$field_value}" ); 503 } 504 } 505 506 if ( $exit_required ) { 507 exit(); 508 } 509 510 /** 511 * Fires once the requested HTTP headers for caching, content type, etc. have been sent. 512 * 513 * @since 2.1.0 514 * 515 * @param WP $this Current WordPress environment instance (passed by reference). 516 */ 517 do_action_ref_array( 'send_headers', array( &$this ) ); 518 } 519 520 /** 521 * Sets the query string property based off of the query variable property. 522 * 523 * The {@see 'query_string'} filter is deprecated, but still works. Plugins should 524 * use the {@see 'request'} filter instead. 525 * 526 * @since 2.0.0 527 */ 528 public function build_query_string() { 529 $this->query_string = ''; 530 foreach ( (array) array_keys( $this->query_vars ) as $wpvar ) { 531 if ( '' != $this->query_vars[ $wpvar ] ) { 532 $this->query_string .= ( strlen( $this->query_string ) < 1 ) ? '' : '&'; 533 if ( ! is_scalar( $this->query_vars[ $wpvar ] ) ) { // Discard non-scalars. 534 continue; 535 } 536 $this->query_string .= $wpvar . '=' . rawurlencode( $this->query_vars[ $wpvar ] ); 537 } 538 } 539 540 if ( has_filter( 'query_string' ) ) { // Don't bother filtering and parsing if no plugins are hooked in. 541 /** 542 * Filters the query string before parsing. 543 * 544 * @since 1.5.0 545 * @deprecated 2.1.0 Use 'query_vars' or 'request' filters instead. 546 * 547 * @param string $query_string The query string to modify. 548 */ 549 $this->query_string = apply_filters( 'query_string', $this->query_string ); 550 parse_str( $this->query_string, $this->query_vars ); 551 } 552 } 553 554 /** 555 * Set up the WordPress Globals. 556 * 557 * The query_vars property will be extracted to the GLOBALS. So care should 558 * be taken when naming global variables that might interfere with the 559 * WordPress environment. 560 * 561 * @since 2.0.0 562 * 563 * @global WP_Query $wp_query WordPress Query object. 564 * @global string $query_string Query string for the loop. 565 * @global array $posts The found posts. 566 * @global WP_Post|null $post The current post, if available. 567 * @global string $request The SQL statement for the request. 568 * @global int $more Only set, if single page or post. 569 * @global int $single If single page or post. Only set, if single page or post. 570 * @global WP_User $authordata Only set, if author archive. 571 */ 572 public function register_globals() { 573 global $wp_query; 574 575 // Extract updated query vars back into global namespace. 576 foreach ( (array) $wp_query->query_vars as $key => $value ) { 577 $GLOBALS[ $key ] = $value; 578 } 579 580 $GLOBALS['query_string'] = $this->query_string; 581 $GLOBALS['posts'] = & $wp_query->posts; 582 $GLOBALS['post'] = isset( $wp_query->post ) ? $wp_query->post : null; 583 $GLOBALS['request'] = $wp_query->request; 584 585 if ( $wp_query->is_single() || $wp_query->is_page() ) { 586 $GLOBALS['more'] = 1; 587 $GLOBALS['single'] = 1; 588 } 589 590 if ( $wp_query->is_author() && isset( $wp_query->post ) ) { 591 $GLOBALS['authordata'] = get_userdata( $wp_query->post->post_author ); 592 } 593 } 594 595 /** 596 * Set up the current user. 597 * 598 * @since 2.0.0 599 */ 600 public function init() { 601 wp_get_current_user(); 602 } 603 604 /** 605 * Set up the Loop based on the query variables. 606 * 607 * @since 2.0.0 608 * 609 * @global WP_Query $wp_the_query WordPress Query object. 610 */ 611 public function query_posts() { 612 global $wp_the_query; 613 $this->build_query_string(); 614 $wp_the_query->query( $this->query_vars ); 615 } 616 617 /** 618 * Set the Headers for 404, if nothing is found for requested URL. 619 * 620 * Issue a 404 if a request doesn't match any posts and doesn't match 621 * any object (e.g. an existing-but-empty category, tag, author) and a 404 was not already 622 * issued, and if the request was not a search or the homepage. 623 * 624 * Otherwise, issue a 200. 625 * 626 * This sets headers after posts have been queried. handle_404() really means "handle status." 627 * By inspecting the result of querying posts, seemingly successful requests can be switched to 628 * a 404 so that canonical redirection logic can kick in. 629 * 630 * @since 2.0.0 631 * 632 * @global WP_Query $wp_query WordPress Query object. 633 */ 634 public function handle_404() { 635 global $wp_query; 636 637 /** 638 * Filters whether to short-circuit default header status handling. 639 * 640 * Returning a non-false value from the filter will short-circuit the handling 641 * and return early. 642 * 643 * @since 4.5.0 644 * 645 * @param bool $preempt Whether to short-circuit default header status handling. Default false. 646 * @param WP_Query $wp_query WordPress Query object. 647 */ 648 if ( false !== apply_filters( 'pre_handle_404', false, $wp_query ) ) { 649 return; 650 } 651 652 // If we've already issued a 404, bail. 653 if ( is_404() ) { 654 return; 655 } 656 657 // Never 404 for the admin, robots, or if we found posts. 658 if ( is_admin() || is_robots() || $wp_query->posts ) { 659 660 $success = true; 661 if ( is_singular() ) { 662 $p = false; 663 664 if ( $wp_query->post instanceof WP_Post ) { 665 $p = clone $wp_query->post; 666 } 667 668 // Only set X-Pingback for single posts that allow pings. 669 if ( $p && pings_open( $p ) && ! headers_sent() ) { 670 header( 'X-Pingback: ' . get_bloginfo( 'pingback_url', 'display' ) ); 671 } 672 673 // check for paged content that exceeds the max number of pages 674 $next = '<!--nextpage-->'; 675 if ( $p && false !== strpos( $p->post_content, $next ) && ! empty( $this->query_vars['page'] ) ) { 676 $page = trim( $this->query_vars['page'], '/' ); 677 $success = (int) $page <= ( substr_count( $p->post_content, $next ) + 1 ); 678 } 679 } 680 681 if ( $success ) { 682 status_header( 200 ); 683 return; 684 } 685 } 686 687 // We will 404 for paged queries, as no posts were found. 688 if ( ! is_paged() ) { 689 690 // Don't 404 for authors without posts as long as they matched an author on this site. 691 $author = get_query_var( 'author' ); 692 if ( is_author() && is_numeric( $author ) && $author > 0 && is_user_member_of_blog( $author ) ) { 693 status_header( 200 ); 694 return; 695 } 696 697 // Don't 404 for these queries if they matched an object. 698 if ( ( is_tag() || is_category() || is_tax() || is_post_type_archive() ) && get_queried_object() ) { 699 status_header( 200 ); 700 return; 701 } 702 703 // Don't 404 for these queries either. 704 if ( is_home() || is_search() || is_feed() ) { 705 status_header( 200 ); 706 return; 707 } 708 } 709 710 // Guess it's time to 404. 711 $wp_query->set_404(); 712 status_header( 404 ); 713 nocache_headers(); 714 } 715 716 /** 717 * Sets up all of the variables required by the WordPress environment. 718 * 719 * The action {@see 'wp'} has one parameter that references the WP object. It 720 * allows for accessing the properties and methods to further manipulate the 721 * object. 722 * 723 * @since 2.0.0 724 * 725 * @param string|array $query_args Passed to parse_request(). 726 */ 727 public function main( $query_args = '' ) { 728 $this->init(); 729 $this->parse_request( $query_args ); 730 $this->send_headers(); 731 $this->query_posts(); 732 $this->handle_404(); 733 $this->register_globals(); 734 735 /** 736 * Fires once the WordPress environment has been set up. 737 * 738 * @since 2.1.0 739 * 740 * @param WP $this Current WordPress environment instance (passed by reference). 741 */ 742 do_action_ref_array( 'wp', array( &$this ) ); 743 } 744 }
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| Generated: Tue Sep 17 01:00:03 2019 | Cross-referenced by PHPXref 0.7.1 |