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/wp-includes/ -> rewrite.php (source)

   1  <?php
   2  /**
   3   * WordPress Rewrite API
   4   *
   5   * @package WordPress
   6   * @subpackage Rewrite
   7   */
   8  
   9  /**
  10   * Endpoint mask that matches nothing.
  11   *
  12   * @since 2.1.0
  13   */
  14  define( 'EP_NONE', 0 );
  15  
  16  /**
  17   * Endpoint mask that matches post permalinks.
  18   *
  19   * @since 2.1.0
  20   */
  21  define( 'EP_PERMALINK', 1 );
  22  
  23  /**
  24   * Endpoint mask that matches attachment permalinks.
  25   *
  26   * @since 2.1.0
  27   */
  28  define( 'EP_ATTACHMENT', 2 );
  29  
  30  /**
  31   * Endpoint mask that matches any date archives.
  32   *
  33   * @since 2.1.0
  34   */
  35  define( 'EP_DATE', 4 );
  36  
  37  /**
  38   * Endpoint mask that matches yearly archives.
  39   *
  40   * @since 2.1.0
  41   */
  42  define( 'EP_YEAR', 8 );
  43  
  44  /**
  45   * Endpoint mask that matches monthly archives.
  46   *
  47   * @since 2.1.0
  48   */
  49  define( 'EP_MONTH', 16 );
  50  
  51  /**
  52   * Endpoint mask that matches daily archives.
  53   *
  54   * @since 2.1.0
  55   */
  56  define( 'EP_DAY', 32 );
  57  
  58  /**
  59   * Endpoint mask that matches the site root.
  60   *
  61   * @since 2.1.0
  62   */
  63  define( 'EP_ROOT', 64 );
  64  
  65  /**
  66   * Endpoint mask that matches comment feeds.
  67   *
  68   * @since 2.1.0
  69   */
  70  define( 'EP_COMMENTS', 128 );
  71  
  72  /**
  73   * Endpoint mask that matches searches.
  74   *
  75   * Note that this only matches a search at a "pretty" URL such as
  76   * `/search/my-search-term`, not `?s=my-search-term`.
  77   *
  78   * @since 2.1.0
  79   */
  80  define( 'EP_SEARCH', 256 );
  81  
  82  /**
  83   * Endpoint mask that matches category archives.
  84   *
  85   * @since 2.1.0
  86   */
  87  define( 'EP_CATEGORIES', 512 );
  88  
  89  /**
  90   * Endpoint mask that matches tag archives.
  91   *
  92   * @since 2.3.0
  93   */
  94  define( 'EP_TAGS', 1024 );
  95  
  96  /**
  97   * Endpoint mask that matches author archives.
  98   *
  99   * @since 2.1.0
 100   */
 101  define( 'EP_AUTHORS', 2048 );
 102  
 103  /**
 104   * Endpoint mask that matches pages.
 105   *
 106   * @since 2.1.0
 107   */
 108  define( 'EP_PAGES', 4096 );
 109  
 110  /**
 111   * Endpoint mask that matches all archive views.
 112   *
 113   * @since 3.7.0
 114   */
 115  define( 'EP_ALL_ARCHIVES', EP_DATE | EP_YEAR | EP_MONTH | EP_DAY | EP_CATEGORIES | EP_TAGS | EP_AUTHORS );
 116  
 117  /**
 118   * Endpoint mask that matches everything.
 119   *
 120   * @since 2.1.0
 121   */
 122  define( 'EP_ALL', EP_PERMALINK | EP_ATTACHMENT | EP_ROOT | EP_COMMENTS | EP_SEARCH | EP_PAGES | EP_ALL_ARCHIVES );
 123  
 124  /**
 125   * Adds a rewrite rule that transforms a URL structure to a set of query vars.
 126   *
 127   * Any value in the $after parameter that isn't 'bottom' will result in the rule
 128   * being placed at the top of the rewrite rules.
 129   *
 130   * @since 2.1.0
 131   * @since 4.4.0 Array support was added to the `$query` parameter.
 132   *
 133   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 134   *
 135   * @param string       $regex Regular expression to match request against.
 136   * @param string|array $query The corresponding query vars for this rewrite rule.
 137   * @param string       $after Optional. Priority of the new rule. Accepts 'top'
 138   *                            or 'bottom'. Default 'bottom'.
 139   */
 140  function add_rewrite_rule( $regex, $query, $after = 'bottom' ) {
 141      global $wp_rewrite;
 142  
 143      $wp_rewrite->add_rule( $regex, $query, $after );
 144  }
 145  
 146  /**
 147   * Add a new rewrite tag (like %postname%).
 148   *
 149   * The `$query` parameter is optional. If it is omitted you must ensure that you call
 150   * this on, or before, the {@see 'init'} hook. This is because `$query` defaults to
 151   * `$tag=`, and for this to work a new query var has to be added.
 152   *
 153   * @since 2.1.0
 154   *
 155   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 156   * @global WP         $wp         Current WordPress environment instance.
 157   *
 158   * @param string $tag   Name of the new rewrite tag.
 159   * @param string $regex Regular expression to substitute the tag for in rewrite rules.
 160   * @param string $query Optional. String to append to the rewritten query. Must end in '='. Default empty.
 161   */
 162  function add_rewrite_tag( $tag, $regex, $query = '' ) {
 163      // Validate the tag's name.
 164      if ( strlen( $tag ) < 3 || '%' !== $tag[0] || '%' !== $tag[ strlen( $tag ) - 1 ] ) {
 165          return;
 166      }
 167  
 168      global $wp_rewrite, $wp;
 169  
 170      if ( empty( $query ) ) {
 171          $qv = trim( $tag, '%' );
 172          $wp->add_query_var( $qv );
 173          $query = $qv . '=';
 174      }
 175  
 176      $wp_rewrite->add_rewrite_tag( $tag, $regex, $query );
 177  }
 178  
 179  /**
 180   * Removes an existing rewrite tag (like %postname%).
 181   *
 182   * @since 4.5.0
 183   *
 184   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 185   *
 186   * @param string $tag Name of the rewrite tag.
 187   */
 188  function remove_rewrite_tag( $tag ) {
 189      global $wp_rewrite;
 190      $wp_rewrite->remove_rewrite_tag( $tag );
 191  }
 192  
 193  /**
 194   * Add permalink structure.
 195   *
 196   * @since 3.0.0
 197   *
 198   * @see WP_Rewrite::add_permastruct()
 199   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 200   *
 201   * @param string $name   Name for permalink structure.
 202   * @param string $struct Permalink structure.
 203   * @param array  $args   Optional. Arguments for building the rules from the permalink structure,
 204   *                       see WP_Rewrite::add_permastruct() for full details. Default empty array.
 205   */
 206  function add_permastruct( $name, $struct, $args = array() ) {
 207      global $wp_rewrite;
 208  
 209      // Back-compat for the old parameters: $with_front and $ep_mask.
 210      if ( ! is_array( $args ) ) {
 211          $args = array( 'with_front' => $args );
 212      }
 213      if ( func_num_args() == 4 ) {
 214          $args['ep_mask'] = func_get_arg( 3 );
 215      }
 216  
 217      $wp_rewrite->add_permastruct( $name, $struct, $args );
 218  }
 219  
 220  /**
 221   * Removes a permalink structure.
 222   *
 223   * Can only be used to remove permastructs that were added using add_permastruct().
 224   * Built-in permastructs cannot be removed.
 225   *
 226   * @since 4.5.0
 227   *
 228   * @see WP_Rewrite::remove_permastruct()
 229   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 230   *
 231   * @param string $name Name for permalink structure.
 232   */
 233  function remove_permastruct( $name ) {
 234      global $wp_rewrite;
 235  
 236      $wp_rewrite->remove_permastruct( $name );
 237  }
 238  
 239  /**
 240   * Add a new feed type like /atom1/.
 241   *
 242   * @since 2.1.0
 243   *
 244   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 245   *
 246   * @param string   $feedname Feed name.
 247   * @param callable $function Callback to run on feed display.
 248   * @return string Feed action name.
 249   */
 250  function add_feed( $feedname, $function ) {
 251      global $wp_rewrite;
 252  
 253      if ( ! in_array( $feedname, $wp_rewrite->feeds, true ) ) {
 254          $wp_rewrite->feeds[] = $feedname;
 255      }
 256  
 257      $hook = 'do_feed_' . $feedname;
 258  
 259      // Remove default function hook.
 260      remove_action( $hook, $hook );
 261  
 262      add_action( $hook, $function, 10, 2 );
 263  
 264      return $hook;
 265  }
 266  
 267  /**
 268   * Remove rewrite rules and then recreate rewrite rules.
 269   *
 270   * @since 3.0.0
 271   *
 272   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 273   *
 274   * @param bool $hard Whether to update .htaccess (hard flush) or just update
 275   *                   rewrite_rules option (soft flush). Default is true (hard).
 276   */
 277  function flush_rewrite_rules( $hard = true ) {
 278      global $wp_rewrite;
 279  
 280      if ( is_callable( array( $wp_rewrite, 'flush_rules' ) ) ) {
 281          $wp_rewrite->flush_rules( $hard );
 282      }
 283  }
 284  
 285  /**
 286   * Add an endpoint, like /trackback/.
 287   *
 288   * Adding an endpoint creates extra rewrite rules for each of the matching
 289   * places specified by the provided bitmask. For example:
 290   *
 291   *     add_rewrite_endpoint( 'json', EP_PERMALINK | EP_PAGES );
 292   *
 293   * will add a new rewrite rule ending with "json(/(.*))?/?$" for every permastruct
 294   * that describes a permalink (post) or page. This is rewritten to "json=$match"
 295   * where $match is the part of the URL matched by the endpoint regex (e.g. "foo" in
 296   * "[permalink]/json/foo/").
 297   *
 298   * A new query var with the same name as the endpoint will also be created.
 299   *
 300   * When specifying $places ensure that you are using the EP_* constants (or a
 301   * combination of them using the bitwise OR operator) as their values are not
 302   * guaranteed to remain static (especially `EP_ALL`).
 303   *
 304   * Be sure to flush the rewrite rules - see flush_rewrite_rules() - when your plugin gets
 305   * activated and deactivated.
 306   *
 307   * @since 2.1.0
 308   * @since 4.3.0 Added support for skipping query var registration by passing `false` to `$query_var`.
 309   *
 310   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 311   *
 312   * @param string      $name      Name of the endpoint.
 313   * @param int         $places    Endpoint mask describing the places the endpoint should be added.
 314   *                               Accepts a mask of:
 315   *                               - `EP_ALL`
 316   *                               - `EP_NONE`
 317   *                               - `EP_ALL_ARCHIVES`
 318   *                               - `EP_ATTACHMENT`
 319   *                               - `EP_AUTHORS`
 320   *                               - `EP_CATEGORIES`
 321   *                               - `EP_COMMENTS`
 322   *                               - `EP_DATE`
 323   *                               - `EP_DAY`
 324   *                               - `EP_MONTH`
 325   *                               - `EP_PAGES`
 326   *                               - `EP_PERMALINK`
 327   *                               - `EP_ROOT`
 328   *                               - `EP_SEARCH`
 329   *                               - `EP_TAGS`
 330   *                               - `EP_YEAR`
 331   * @param string|bool $query_var Name of the corresponding query variable. Pass `false` to skip registering a query_var
 332   *                               for this endpoint. Defaults to the value of `$name`.
 333   */
 334  function add_rewrite_endpoint( $name, $places, $query_var = true ) {
 335      global $wp_rewrite;
 336      $wp_rewrite->add_endpoint( $name, $places, $query_var );
 337  }
 338  
 339  /**
 340   * Filters the URL base for taxonomies.
 341   *
 342   * To remove any manually prepended /index.php/.
 343   *
 344   * @access private
 345   * @since 2.6.0
 346   *
 347   * @param string $base The taxonomy base that we're going to filter
 348   * @return string
 349   */
 350  function _wp_filter_taxonomy_base( $base ) {
 351      if ( ! empty( $base ) ) {
 352          $base = preg_replace( '|^/index\.php/|', '', $base );
 353          $base = trim( $base, '/' );
 354      }
 355      return $base;
 356  }
 357  
 358  
 359  /**
 360   * Resolve numeric slugs that collide with date permalinks.
 361   *
 362   * Permalinks of posts with numeric slugs can sometimes look to WP_Query::parse_query()
 363   * like a date archive, as when your permalink structure is `/%year%/%postname%/` and
 364   * a post with post_name '05' has the URL `/2015/05/`.
 365   *
 366   * This function detects conflicts of this type and resolves them in favor of the
 367   * post permalink.
 368   *
 369   * Note that, since 4.3.0, wp_unique_post_slug() prevents the creation of post slugs
 370   * that would result in a date archive conflict. The resolution performed in this
 371   * function is primarily for legacy content, as well as cases when the admin has changed
 372   * the site's permalink structure in a way that introduces URL conflicts.
 373   *
 374   * @since 4.3.0
 375   *
 376   * @param array $query_vars Optional. Query variables for setting up the loop, as determined in
 377   *                          WP::parse_request(). Default empty array.
 378   * @return array Returns the original array of query vars, with date/post conflicts resolved.
 379   */
 380  function wp_resolve_numeric_slug_conflicts( $query_vars = array() ) {
 381      if ( ! isset( $query_vars['year'] ) && ! isset( $query_vars['monthnum'] ) && ! isset( $query_vars['day'] ) ) {
 382          return $query_vars;
 383      }
 384  
 385      // Identify the 'postname' position in the permastruct array.
 386      $permastructs   = array_values( array_filter( explode( '/', get_option( 'permalink_structure' ) ) ) );
 387      $postname_index = array_search( '%postname%', $permastructs, true );
 388  
 389      if ( false === $postname_index ) {
 390          return $query_vars;
 391      }
 392  
 393      /*
 394       * A numeric slug could be confused with a year, month, or day, depending on position. To account for
 395       * the possibility of post pagination (eg 2015/2 for the second page of a post called '2015'), our
 396       * `is_*` checks are generous: check for year-slug clashes when `is_year` *or* `is_month`, and check
 397       * for month-slug clashes when `is_month` *or* `is_day`.
 398       */
 399      $compare = '';
 400      if ( 0 === $postname_index && ( isset( $query_vars['year'] ) || isset( $query_vars['monthnum'] ) ) ) {
 401          $compare = 'year';
 402      } elseif ( $postname_index && '%year%' === $permastructs[ $postname_index - 1 ] && ( isset( $query_vars['monthnum'] ) || isset( $query_vars['day'] ) ) ) {
 403          $compare = 'monthnum';
 404      } elseif ( $postname_index && '%monthnum%' === $permastructs[ $postname_index - 1 ] && isset( $query_vars['day'] ) ) {
 405          $compare = 'day';
 406      }
 407  
 408      if ( ! $compare ) {
 409          return $query_vars;
 410      }
 411  
 412      // This is the potentially clashing slug.
 413      $value = $query_vars[ $compare ];
 414  
 415      $post = get_page_by_path( $value, OBJECT, 'post' );
 416      if ( ! ( $post instanceof WP_Post ) ) {
 417          return $query_vars;
 418      }
 419  
 420      // If the date of the post doesn't match the date specified in the URL, resolve to the date archive.
 421      if ( preg_match( '/^([0-9]{4})\-([0-9]{2})/', $post->post_date, $matches ) && isset( $query_vars['year'] ) && ( 'monthnum' === $compare || 'day' === $compare ) ) {
 422          // $matches[1] is the year the post was published.
 423          if ( (int) $query_vars['year'] !== (int) $matches[1] ) {
 424              return $query_vars;
 425          }
 426  
 427          // $matches[2] is the month the post was published.
 428          if ( 'day' === $compare && isset( $query_vars['monthnum'] ) && (int) $query_vars['monthnum'] !== (int) $matches[2] ) {
 429              return $query_vars;
 430          }
 431      }
 432  
 433      /*
 434       * If the located post contains nextpage pagination, then the URL chunk following postname may be
 435       * intended as the page number. Verify that it's a valid page before resolving to it.
 436       */
 437      $maybe_page = '';
 438      if ( 'year' === $compare && isset( $query_vars['monthnum'] ) ) {
 439          $maybe_page = $query_vars['monthnum'];
 440      } elseif ( 'monthnum' === $compare && isset( $query_vars['day'] ) ) {
 441          $maybe_page = $query_vars['day'];
 442      }
 443      // Bug found in #11694 - 'page' was returning '/4'.
 444      $maybe_page = (int) trim( $maybe_page, '/' );
 445  
 446      $post_page_count = substr_count( $post->post_content, '<!--nextpage-->' ) + 1;
 447  
 448      // If the post doesn't have multiple pages, but a 'page' candidate is found, resolve to the date archive.
 449      if ( 1 === $post_page_count && $maybe_page ) {
 450          return $query_vars;
 451      }
 452  
 453      // If the post has multiple pages and the 'page' number isn't valid, resolve to the date archive.
 454      if ( $post_page_count > 1 && $maybe_page > $post_page_count ) {
 455          return $query_vars;
 456      }
 457  
 458      // If we've gotten to this point, we have a slug/date clash. First, adjust for nextpage.
 459      if ( '' !== $maybe_page ) {
 460          $query_vars['page'] = (int) $maybe_page;
 461      }
 462  
 463      // Next, unset autodetected date-related query vars.
 464      unset( $query_vars['year'] );
 465      unset( $query_vars['monthnum'] );
 466      unset( $query_vars['day'] );
 467  
 468      // Then, set the identified post.
 469      $query_vars['name'] = $post->post_name;
 470  
 471      // Finally, return the modified query vars.
 472      return $query_vars;
 473  }
 474  
 475  /**
 476   * Examine a URL and try to determine the post ID it represents.
 477   *
 478   * Checks are supposedly from the hosted site blog.
 479   *
 480   * @since 1.0.0
 481   *
 482   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 483   * @global WP         $wp         Current WordPress environment instance.
 484   *
 485   * @param string $url Permalink to check.
 486   * @return int Post ID, or 0 on failure.
 487   */
 488  function url_to_postid( $url ) {
 489      global $wp_rewrite;
 490  
 491      /**
 492       * Filters the URL to derive the post ID from.
 493       *
 494       * @since 2.2.0
 495       *
 496       * @param string $url The URL to derive the post ID from.
 497       */
 498      $url = apply_filters( 'url_to_postid', $url );
 499  
 500      $url_host      = str_replace( 'www.', '', parse_url( $url, PHP_URL_HOST ) );
 501      $home_url_host = str_replace( 'www.', '', parse_url( home_url(), PHP_URL_HOST ) );
 502  
 503      // Bail early if the URL does not belong to this site.
 504      if ( $url_host && $url_host !== $home_url_host ) {
 505          return 0;
 506      }
 507  
 508      // First, check to see if there is a 'p=N' or 'page_id=N' to match against.
 509      if ( preg_match( '#[?&](p|page_id|attachment_id)=(\d+)#', $url, $values ) ) {
 510          $id = absint( $values[2] );
 511          if ( $id ) {
 512              return $id;
 513          }
 514      }
 515  
 516      // Get rid of the #anchor.
 517      $url_split = explode( '#', $url );
 518      $url       = $url_split[0];
 519  
 520      // Get rid of URL ?query=string.
 521      $url_split = explode( '?', $url );
 522      $url       = $url_split[0];
 523  
 524      // Set the correct URL scheme.
 525      $scheme = parse_url( home_url(), PHP_URL_SCHEME );
 526      $url    = set_url_scheme( $url, $scheme );
 527  
 528      // Add 'www.' if it is absent and should be there.
 529      if ( false !== strpos( home_url(), '://www.' ) && false === strpos( $url, '://www.' ) ) {
 530          $url = str_replace( '://', '://www.', $url );
 531      }
 532  
 533      // Strip 'www.' if it is present and shouldn't be.
 534      if ( false === strpos( home_url(), '://www.' ) ) {
 535          $url = str_replace( '://www.', '://', $url );
 536      }
 537  
 538      if ( trim( $url, '/' ) === home_url() && 'page' === get_option( 'show_on_front' ) ) {
 539          $page_on_front = get_option( 'page_on_front' );
 540  
 541          if ( $page_on_front && get_post( $page_on_front ) instanceof WP_Post ) {
 542              return (int) $page_on_front;
 543          }
 544      }
 545  
 546      // Check to see if we are using rewrite rules.
 547      $rewrite = $wp_rewrite->wp_rewrite_rules();
 548  
 549      // Not using rewrite rules, and 'p=N' and 'page_id=N' methods failed, so we're out of options.
 550      if ( empty( $rewrite ) ) {
 551          return 0;
 552      }
 553  
 554      // Strip 'index.php/' if we're not using path info permalinks.
 555      if ( ! $wp_rewrite->using_index_permalinks() ) {
 556          $url = str_replace( $wp_rewrite->index . '/', '', $url );
 557      }
 558  
 559      if ( false !== strpos( trailingslashit( $url ), home_url( '/' ) ) ) {
 560          // Chop off http://domain.com/[path].
 561          $url = str_replace( home_url(), '', $url );
 562      } else {
 563          // Chop off /path/to/blog.
 564          $home_path = parse_url( home_url( '/' ) );
 565          $home_path = isset( $home_path['path'] ) ? $home_path['path'] : '';
 566          $url       = preg_replace( sprintf( '#^%s#', preg_quote( $home_path ) ), '', trailingslashit( $url ) );
 567      }
 568  
 569      // Trim leading and lagging slashes.
 570      $url = trim( $url, '/' );
 571  
 572      $request              = $url;
 573      $post_type_query_vars = array();
 574  
 575      foreach ( get_post_types( array(), 'objects' ) as $post_type => $t ) {
 576          if ( ! empty( $t->query_var ) ) {
 577              $post_type_query_vars[ $t->query_var ] = $post_type;
 578          }
 579      }
 580  
 581      // Look for matches.
 582      $request_match = $request;
 583      foreach ( (array) $rewrite as $match => $query ) {
 584  
 585          // If the requesting file is the anchor of the match,
 586          // prepend it to the path info.
 587          if ( ! empty( $url ) && ( $url != $request ) && ( strpos( $match, $url ) === 0 ) ) {
 588              $request_match = $url . '/' . $request;
 589          }
 590  
 591          if ( preg_match( "#^$match#", $request_match, $matches ) ) {
 592  
 593              if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
 594                  // This is a verbose page match, let's check to be sure about it.
 595                  $page = get_page_by_path( $matches[ $varmatch[1] ] );
 596                  if ( ! $page ) {
 597                      continue;
 598                  }
 599  
 600                  $post_status_obj = get_post_status_object( $page->post_status );
 601                  if ( ! $post_status_obj->public && ! $post_status_obj->protected
 602                      && ! $post_status_obj->private && $post_status_obj->exclude_from_search ) {
 603                      continue;
 604                  }
 605              }
 606  
 607              // Got a match.
 608              // Trim the query of everything up to the '?'.
 609              $query = preg_replace( '!^.+\?!', '', $query );
 610  
 611              // Substitute the substring matches into the query.
 612              $query = addslashes( WP_MatchesMapRegex::apply( $query, $matches ) );
 613  
 614              // Filter out non-public query vars.
 615              global $wp;
 616              parse_str( $query, $query_vars );
 617              $query = array();
 618              foreach ( (array) $query_vars as $key => $value ) {
 619                  if ( in_array( (string) $key, $wp->public_query_vars, true ) ) {
 620                      $query[ $key ] = $value;
 621                      if ( isset( $post_type_query_vars[ $key ] ) ) {
 622                          $query['post_type'] = $post_type_query_vars[ $key ];
 623                          $query['name']      = $value;
 624                      }
 625                  }
 626              }
 627  
 628              // Resolve conflicts between posts with numeric slugs and date archive queries.
 629              $query = wp_resolve_numeric_slug_conflicts( $query );
 630  
 631              // Do the query.
 632              $query = new WP_Query( $query );
 633              if ( ! empty( $query->posts ) && $query->is_singular ) {
 634                  return $query->post->ID;
 635              } else {
 636                  return 0;
 637              }
 638          }
 639      }
 640      return 0;
 641  }


Generated: Sun Sep 26 01:00:08 2021 Cross-referenced by PHPXref 0.7.1