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   1  <?php
   2  /**
   3   * Taxonomy API
   4   *
   5   * @package WordPress
   6   * @subpackage Taxonomy
   7   * @since 2.3.0
   8   */
   9  
  10  //
  11  // Taxonomy Registration
  12  //
  13  
  14  /**
  15   * Creates the initial taxonomies when 'init' action is fired.
  16   */
  17  function create_initial_taxonomies() {
  18      register_taxonomy( 'category', 'post', array('hierarchical' => true, 'update_count_callback' => '_update_post_term_count', 'label' => __('Categories'), 'query_var' => false, 'rewrite' => false) ) ;
  19      register_taxonomy( 'post_tag', 'post', array('hierarchical' => false, 'update_count_callback' => '_update_post_term_count', 'label' => __('Post Tags'), 'query_var' => false, 'rewrite' => false) ) ;
  20      register_taxonomy( 'link_category', 'link', array('hierarchical' => false, 'label' => __('Categories'), 'query_var' => false, 'rewrite' => false) ) ;
  21  }
  22  add_action( 'init', 'create_initial_taxonomies', 0 ); // highest priority
  23  
  24  /**
  25   * Return all of the taxonomy names that are of $object_type.
  26   *
  27   * It appears that this function can be used to find all of the names inside of
  28   * $wp_taxonomies global variable.
  29   *
  30   * <code><?php $taxonomies = get_object_taxonomies('post'); ?></code> Should
  31   * result in <code>Array('category', 'post_tag')</code>
  32   *
  33   * @package WordPress
  34   * @subpackage Taxonomy
  35   * @since 2.3.0
  36   *
  37   * @uses $wp_taxonomies
  38   *
  39   * @param array|string|object $object Name of the type of taxonomy object, or an object (row from posts)
  40   * @return array The names of all taxonomy of $object_type.
  41   */
  42  function get_object_taxonomies($object) {
  43      global $wp_taxonomies;
  44  
  45      if ( is_object($object) ) {
  46          if ( $object->post_type == 'attachment' )
  47              return get_attachment_taxonomies($object);
  48          $object = $object->post_type;
  49      }
  50  
  51      $object = (array) $object;
  52  
  53      $taxonomies = array();
  54      foreach ( (array) $wp_taxonomies as $taxonomy ) {
  55          if ( array_intersect($object, (array) $taxonomy->object_type) )
  56              $taxonomies[] = $taxonomy->name;
  57      }
  58  
  59      return $taxonomies;
  60  }
  61  
  62  /**
  63   * Retrieves the taxonomy object of $taxonomy.
  64   *
  65   * The get_taxonomy function will first check that the parameter string given
  66   * is a taxonomy object and if it is, it will return it.
  67   *
  68   * @package WordPress
  69   * @subpackage Taxonomy
  70   * @since 2.3.0
  71   *
  72   * @uses $wp_taxonomies
  73   * @uses is_taxonomy() Checks whether taxonomy exists
  74   *
  75   * @param string $taxonomy Name of taxonomy object to return
  76   * @return object|bool The Taxonomy Object or false if $taxonomy doesn't exist
  77   */
  78  function get_taxonomy( $taxonomy ) {
  79      global $wp_taxonomies;
  80  
  81      if ( ! is_taxonomy($taxonomy) )
  82          return false;
  83  
  84      return $wp_taxonomies[$taxonomy];
  85  }
  86  
  87  /**
  88   * Checks that the taxonomy name exists.
  89   *
  90   * @package WordPress
  91   * @subpackage Taxonomy
  92   * @since 2.3.0
  93   *
  94   * @uses $wp_taxonomies
  95   *
  96   * @param string $taxonomy Name of taxonomy object
  97   * @return bool Whether the taxonomy exists or not.
  98   */
  99  function is_taxonomy( $taxonomy ) {
 100      global $wp_taxonomies;
 101  
 102      return isset($wp_taxonomies[$taxonomy]);
 103  }
 104  
 105  /**
 106   * Whether the taxonomy object is hierarchical.
 107   *
 108   * Checks to make sure that the taxonomy is an object first. Then Gets the
 109   * object, and finally returns the hierarchical value in the object.
 110   *
 111   * A false return value might also mean that the taxonomy does not exist.
 112   *
 113   * @package WordPress
 114   * @subpackage Taxonomy
 115   * @since 2.3.0
 116   *
 117   * @uses is_taxonomy() Checks whether taxonomy exists
 118   * @uses get_taxonomy() Used to get the taxonomy object
 119   *
 120   * @param string $taxonomy Name of taxonomy object
 121   * @return bool Whether the taxonomy is hierarchical
 122   */
 123  function is_taxonomy_hierarchical($taxonomy) {
 124      if ( ! is_taxonomy($taxonomy) )
 125          return false;
 126  
 127      $taxonomy = get_taxonomy($taxonomy);
 128      return $taxonomy->hierarchical;
 129  }
 130  
 131  /**
 132   * Create or modify a taxonomy object. Do not use before init.
 133   *
 134   * A simple function for creating or modifying a taxonomy object based on the
 135   * parameters given. The function will accept an array (third optional
 136   * parameter), along with strings for the taxonomy name and another string for
 137   * the object type.
 138   *
 139   * Nothing is returned, so expect error maybe or use is_taxonomy() to check
 140   * whether taxonomy exists.
 141   *
 142   * Optional $args contents:
 143   *
 144   * hierarachical - has some defined purpose at other parts of the API and is a
 145   * boolean value.
 146   *
 147   * update_count_callback - works much like a hook, in that it will be called
 148   * when the count is updated.
 149   *
 150   * rewrite - false to prevent rewrite, or array('slug'=>$slug) to customize
 151   * permastruct; default will use $taxonomy as slug.
 152   *
 153   * query_var - false to prevent queries, or string to customize query var
 154   * (?$query_var=$term); default will use $taxonomy as query var.
 155   *
 156   * @package WordPress
 157   * @subpackage Taxonomy
 158   * @since 2.3.0
 159   * @uses $wp_taxonomies Inserts new taxonomy object into the list
 160   * @uses $wp_rewrite Adds rewrite tags and permastructs
 161   * @uses $wp Adds query vars
 162   *
 163   * @param string $taxonomy Name of taxonomy object
 164   * @param array|string $object_type Name of the object type for the taxonomy object.
 165   * @param array|string $args See above description for the two keys values.
 166   */
 167  function register_taxonomy( $taxonomy, $object_type, $args = array() ) {
 168      global $wp_taxonomies, $wp_rewrite, $wp;
 169  
 170      if (!is_array($wp_taxonomies))
 171          $wp_taxonomies = array();
 172  
 173      $defaults = array('hierarchical' => false, 'update_count_callback' => '', 'rewrite' => true, 'query_var' => true);
 174      $args = wp_parse_args($args, $defaults);
 175  
 176      if ( false !== $args['query_var'] && !empty($wp) ) {
 177          if ( true === $args['query_var'] )
 178              $args['query_var'] = $taxonomy;
 179          $args['query_var'] = sanitize_title_with_dashes($args['query_var']);
 180          $wp->add_query_var($args['query_var']);
 181      }
 182  
 183      if ( false !== $args['rewrite'] && !empty($wp_rewrite) ) {
 184          if ( !is_array($args['rewrite']) )
 185              $args['rewrite'] = array();
 186          if ( !isset($args['rewrite']['slug']) )
 187              $args['rewrite']['slug'] = sanitize_title_with_dashes($taxonomy);
 188          $wp_rewrite->add_rewrite_tag("%$taxonomy%", '([^/]+)', $args['query_var'] ? "{$args['query_var']}=" : "taxonomy=$taxonomy&term=$term");
 189          $wp_rewrite->add_permastruct($taxonomy, "{$args['rewrite']['slug']}/%$taxonomy%");
 190      }
 191  
 192      $args['name'] = $taxonomy;
 193      $args['object_type'] = $object_type;
 194      $wp_taxonomies[$taxonomy] = (object) $args;
 195  }
 196  
 197  //
 198  // Term API
 199  //
 200  
 201  /**
 202   * Retrieve object_ids of valid taxonomy and term.
 203   *
 204   * The strings of $taxonomies must exist before this function will continue. On
 205   * failure of finding a valid taxonomy, it will return an WP_Error class, kind
 206   * of like Exceptions in PHP 5, except you can't catch them. Even so, you can
 207   * still test for the WP_Error class and get the error message.
 208   *
 209   * The $terms aren't checked the same as $taxonomies, but still need to exist
 210   * for $object_ids to be returned.
 211   *
 212   * It is possible to change the order that object_ids is returned by either
 213   * using PHP sort family functions or using the database by using $args with
 214   * either ASC or DESC array. The value should be in the key named 'order'.
 215   *
 216   * @package WordPress
 217   * @subpackage Taxonomy
 218   * @since 2.3.0
 219   *
 220   * @uses $wpdb
 221   * @uses wp_parse_args() Creates an array from string $args.
 222   *
 223   * @param string|array $terms String of term or array of string values of terms that will be used
 224   * @param string|array $taxonomies String of taxonomy name or Array of string values of taxonomy names
 225   * @param array|string $args Change the order of the object_ids, either ASC or DESC
 226   * @return WP_Error|array If the taxonomy does not exist, then WP_Error will be returned. On success
 227   *    the array can be empty meaning that there are no $object_ids found or it will return the $object_ids found.
 228   */
 229  function get_objects_in_term( $terms, $taxonomies, $args = array() ) {
 230      global $wpdb;
 231  
 232      if ( !is_array( $terms) )
 233          $terms = array($terms);
 234  
 235      if ( !is_array($taxonomies) )
 236          $taxonomies = array($taxonomies);
 237  
 238      foreach ( (array) $taxonomies as $taxonomy ) {
 239          if ( ! is_taxonomy($taxonomy) )
 240              return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy'));
 241      }
 242  
 243      $defaults = array('order' => 'ASC');
 244      $args = wp_parse_args( $args, $defaults );
 245      extract($args, EXTR_SKIP);
 246  
 247      $order = ( 'desc' == strtolower($order) ) ? 'DESC' : 'ASC';
 248  
 249      $terms = array_map('intval', $terms);
 250  
 251      $taxonomies = "'" . implode("', '", $taxonomies) . "'";
 252      $terms = "'" . implode("', '", $terms) . "'";
 253  
 254      $object_ids = $wpdb->get_col("SELECT tr.object_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ($taxonomies) AND tt.term_id IN ($terms) ORDER BY tr.object_id $order");
 255  
 256      if ( ! $object_ids )
 257          return array();
 258  
 259      return $object_ids;
 260  }
 261  
 262  /**
 263   * Get all Term data from database by Term ID.
 264   *
 265   * The usage of the get_term function is to apply filters to a term object. It
 266   * is possible to get a term object from the database before applying the
 267   * filters.
 268   *
 269   * $term ID must be part of $taxonomy, to get from the database. Failure, might
 270   * be able to be captured by the hooks. Failure would be the same value as $wpdb
 271   * returns for the get_row method.
 272   *
 273   * There are two hooks, one is specifically for each term, named 'get_term', and
 274   * the second is for the taxonomy name, 'term_$taxonomy'. Both hooks gets the
 275   * term object, and the taxonomy name as parameters. Both hooks are expected to
 276   * return a Term object.
 277   *
 278   * 'get_term' hook - Takes two parameters the term Object and the taxonomy name.
 279   * Must return term object. Used in get_term() as a catch-all filter for every
 280   * $term.
 281   *
 282   * 'get_$taxonomy' hook - Takes two parameters the term Object and the taxonomy
 283   * name. Must return term object. $taxonomy will be the taxonomy name, so for
 284   * example, if 'category', it would be 'get_category' as the filter name. Useful
 285   * for custom taxonomies or plugging into default taxonomies.
 286   *
 287   * @package WordPress
 288   * @subpackage Taxonomy
 289   * @since 2.3.0
 290   *
 291   * @uses $wpdb
 292   * @uses sanitize_term() Cleanses the term based on $filter context before returning.
 293   * @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param.
 294   *
 295   * @param int|object $term If integer, will get from database. If object will apply filters and return $term.
 296   * @param string $taxonomy Taxonomy name that $term is part of.
 297   * @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N
 298   * @param string $filter Optional, default is raw or no WordPress defined filter will applied.
 299   * @return mixed|null|WP_Error Term Row from database. Will return null if $term is empty. If taxonomy does not
 300   * exist then WP_Error will be returned.
 301   */
 302  function &get_term($term, $taxonomy, $output = OBJECT, $filter = 'raw') {
 303      global $wpdb;
 304      $null = null;
 305  
 306      if ( empty($term) ) {
 307          $error = new WP_Error('invalid_term', __('Empty Term'));
 308          return $error;
 309      }
 310  
 311      if ( ! is_taxonomy($taxonomy) ) {
 312          $error = new WP_Error('invalid_taxonomy', __('Invalid Taxonomy'));
 313          return $error;
 314      }
 315  
 316      if ( is_object($term) && empty($term->filter) ) {
 317          wp_cache_add($term->term_id, $term, $taxonomy);
 318          $_term = $term;
 319      } else {
 320          if ( is_object($term) )
 321              $term = $term->term_id;
 322          $term = (int) $term;
 323          if ( ! $_term = wp_cache_get($term, $taxonomy) ) {
 324              $_term = $wpdb->get_row( $wpdb->prepare( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND t.term_id = %s LIMIT 1", $taxonomy, $term) );
 325              if ( ! $_term )
 326                  return $null;
 327              wp_cache_add($term, $_term, $taxonomy);
 328          }
 329      }
 330  
 331      $_term = apply_filters('get_term', $_term, $taxonomy);
 332      $_term = apply_filters("get_$taxonomy", $_term, $taxonomy);
 333      $_term = sanitize_term($_term, $taxonomy, $filter);
 334  
 335      if ( $output == OBJECT ) {
 336          return $_term;
 337      } elseif ( $output == ARRAY_A ) {
 338          $__term = get_object_vars($_term);
 339          return $__term;
 340      } elseif ( $output == ARRAY_N ) {
 341          $__term = array_values(get_object_vars($_term));
 342          return $__term;
 343      } else {
 344          return $_term;
 345      }
 346  }
 347  
 348  /**
 349   * Get all Term data from database by Term field and data.
 350   *
 351   * Warning: $value is not escaped for 'name' $field. You must do it yourself, if
 352   * required.
 353   *
 354   * The default $field is 'id', therefore it is possible to also use null for
 355   * field, but not recommended that you do so.
 356   *
 357   * If $value does not exist, the return value will be false. If $taxonomy exists
 358   * and $field and $value combinations exist, the Term will be returned.
 359   *
 360   * @package WordPress
 361   * @subpackage Taxonomy
 362   * @since 2.3.0
 363   *
 364   * @uses $wpdb
 365   * @uses sanitize_term() Cleanses the term based on $filter context before returning.
 366   * @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param.
 367   *
 368   * @param string $field Either 'slug', 'name', or 'id'
 369   * @param string|int $value Search for this term value
 370   * @param string $taxonomy Taxonomy Name
 371   * @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N
 372   * @param string $filter Optional, default is raw or no WordPress defined filter will applied.
 373   * @return mixed Term Row from database. Will return false if $taxonomy does not exist or $term was not found.
 374   */
 375  function get_term_by($field, $value, $taxonomy, $output = OBJECT, $filter = 'raw') {
 376      global $wpdb;
 377  
 378      if ( ! is_taxonomy($taxonomy) )
 379          return false;
 380  
 381      if ( 'slug' == $field ) {
 382          $field = 't.slug';
 383          $value = sanitize_title($value);
 384          if ( empty($value) )
 385              return false;
 386      } else if ( 'name' == $field ) {
 387          // Assume already escaped
 388          $value = stripslashes($value);
 389          $field = 't.name';
 390      } else {
 391          $field = 't.term_id';
 392          $value = (int) $value;
 393      }
 394  
 395      $term = $wpdb->get_row( $wpdb->prepare( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND $field = %s LIMIT 1", $taxonomy, $value) );
 396      if ( !$term )
 397          return false;
 398  
 399      wp_cache_add($term->term_id, $term, $taxonomy);
 400  
 401      $term = sanitize_term($term, $taxonomy, $filter);
 402  
 403      if ( $output == OBJECT ) {
 404          return $term;
 405      } elseif ( $output == ARRAY_A ) {
 406          return get_object_vars($term);
 407      } elseif ( $output == ARRAY_N ) {
 408          return array_values(get_object_vars($term));
 409      } else {
 410          return $term;
 411      }
 412  }
 413  
 414  /**
 415   * Merge all term children into a single array of their IDs.
 416   *
 417   * This recursive function will merge all of the children of $term into the same
 418   * array of term IDs. Only useful for taxonomies which are hierarchical.
 419   *
 420   * Will return an empty array if $term does not exist in $taxonomy.
 421   *
 422   * @package WordPress
 423   * @subpackage Taxonomy
 424   * @since 2.3.0
 425   *
 426   * @uses $wpdb
 427   * @uses _get_term_hierarchy()
 428   * @uses get_term_children() Used to get the children of both $taxonomy and the parent $term
 429   *
 430   * @param string $term ID of Term to get children
 431   * @param string $taxonomy Taxonomy Name
 432   * @return array|WP_Error List of Term Objects. WP_Error returned if $taxonomy does not exist
 433   */
 434  function get_term_children( $term_id, $taxonomy ) {
 435      if ( ! is_taxonomy($taxonomy) )
 436          return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy'));
 437  
 438      $term_id = intval( $term_id );
 439  
 440      $terms = _get_term_hierarchy($taxonomy);
 441  
 442      if ( ! isset($terms[$term_id]) )
 443          return array();
 444  
 445      $children = $terms[$term_id];
 446  
 447      foreach ( (array) $terms[$term_id] as $child ) {
 448          if ( isset($terms[$child]) )
 449              $children = array_merge($children, get_term_children($child, $taxonomy));
 450      }
 451  
 452      return $children;
 453  }
 454  
 455  /**
 456   * Get sanitized Term field.
 457   *
 458   * Does checks for $term, based on the $taxonomy. The function is for contextual
 459   * reasons and for simplicity of usage. See sanitize_term_field() for more
 460   * information.
 461   *
 462   * @package WordPress
 463   * @subpackage Taxonomy
 464   * @since 2.3.0
 465   *
 466   * @uses sanitize_term_field() Passes the return value in sanitize_term_field on success.
 467   *
 468   * @param string $field Term field to fetch
 469   * @param int $term Term ID
 470   * @param string $taxonomy Taxonomy Name
 471   * @param string $context Optional, default is display. Look at sanitize_term_field() for available options.
 472   * @return mixed Will return an empty string if $term is not an object or if $field is not set in $term.
 473   */
 474  function get_term_field( $field, $term, $taxonomy, $context = 'display' ) {
 475      $term = (int) $term;
 476      $term = get_term( $term, $taxonomy );
 477      if ( is_wp_error($term) )
 478          return $term;
 479  
 480      if ( !is_object($term) )
 481          return '';
 482  
 483      if ( !isset($term->$field) )
 484          return '';
 485  
 486      return sanitize_term_field($field, $term->$field, $term->term_id, $taxonomy, $context);
 487  }
 488  
 489  /**
 490   * Sanitizes Term for editing.
 491   *
 492   * Return value is sanitize_term() and usage is for sanitizing the term for
 493   * editing. Function is for contextual and simplicity.
 494   *
 495   * @package WordPress
 496   * @subpackage Taxonomy
 497   * @since 2.3.0
 498   *
 499   * @uses sanitize_term() Passes the return value on success
 500   *
 501   * @param int|object $id Term ID or Object
 502   * @param string $taxonomy Taxonomy Name
 503   * @return mixed|null|WP_Error Will return empty string if $term is not an object.
 504   */
 505  function get_term_to_edit( $id, $taxonomy ) {
 506      $term = get_term( $id, $taxonomy );
 507  
 508      if ( is_wp_error($term) )
 509          return $term;
 510  
 511      if ( !is_object($term) )
 512          return '';
 513  
 514      return sanitize_term($term, $taxonomy, 'edit');
 515  }
 516  
 517  /**
 518   * Retrieve the terms in a given taxonomy or list of taxonomies.
 519   *
 520   * You can fully inject any customizations to the query before it is sent, as
 521   * well as control the output with a filter.
 522   *
 523   * The 'get_terms' filter will be called when the cache has the term and will
 524   * pass the found term along with the array of $taxonomies and array of $args.
 525   * This filter is also called before the array of terms is passed and will pass
 526   * the array of terms, along with the $taxonomies and $args.
 527   *
 528   * The 'list_terms_exclusions' filter passes the compiled exclusions along with
 529   * the $args.
 530   *
 531   * The 'get_terms_orderby' filter passes the ORDER BY clause for the query
 532   * along with the $args array.
 533  
 534   * The 'get_terms_fields' filter passes the fields for the SELECT query
 535   * along with the $args array.
 536   *
 537   * The list of arguments that $args can contain, which will overwrite the defaults:
 538   *
 539   * orderby - Default is 'name'. Can be name, count, term_group, slug or nothing
 540   * (will use term_id), Passing a custom value other than these will cause it to
 541   * order based on the custom value.
 542   *
 543   * order - Default is ASC. Can use DESC.
 544   *
 545   * hide_empty - Default is true. Will not return empty terms, which means
 546   * terms whose count is 0 according to the given taxonomy.
 547   *
 548   * exclude - Default is an empty string.  A comma- or space-delimited string
 549   * of term ids to exclude from the return array.  If 'include' is non-empty,
 550   * 'exclude' is ignored.
 551   *
 552   * exclude_tree - A comma- or space-delimited string of term ids to exclude
 553   * from the return array, along with all of their descendant terms according to
 554   * the primary taxonomy.  If 'include' is non-empty, 'exclude_tree' is ignored.
 555   *
 556   * include - Default is an empty string.  A comma- or space-delimited string
 557   * of term ids to include in the return array.
 558   *
 559   * number - The maximum number of terms to return.  Default is empty.
 560   *
 561   * offset - The number by which to offset the terms query.
 562   *
 563   * fields - Default is 'all', which returns an array of term objects.
 564   * If 'fields' is 'ids' or 'names', returns an array of
 565   * integers or strings, respectively.
 566   *
 567   * slug - Returns terms whose "slug" matches this value. Default is empty string.
 568   *
 569   * hierarchical - Whether to include terms that have non-empty descendants
 570   * (even if 'hide_empty' is set to true).
 571   *
 572   * search - Returned terms' names will contain the value of 'search',
 573   * case-insensitive.  Default is an empty string.
 574   *
 575   * name__like - Returned terms' names will begin with the value of 'name__like',
 576   * case-insensitive. Default is empty string.
 577   *
 578   * The argument 'pad_counts', if set to true will include the quantity of a term's
 579   * children in the quantity of each term's "count" object variable.
 580   *
 581   * The 'get' argument, if set to 'all' instead of its default empty string,
 582   * returns terms regardless of ancestry or whether the terms are empty.
 583   *
 584   * The 'child_of' argument, when used, should be set to the integer of a term ID.  Its default
 585   * is 0.  If set to a non-zero value, all returned terms will be descendants
 586   * of that term according to the given taxonomy.  Hence 'child_of' is set to 0
 587   * if more than one taxonomy is passed in $taxonomies, because multiple taxonomies
 588   * make term ancestry ambiguous.
 589   *
 590   * The 'parent' argument, when used, should be set to the integer of a term ID.  Its default is
 591   * the empty string '', which has a different meaning from the integer 0.
 592   * If set to an integer value, all returned terms will have as an immediate
 593   * ancestor the term whose ID is specified by that integer according to the given taxonomy.
 594   * The 'parent' argument is different from 'child_of' in that a term X is considered a 'parent'
 595   * of term Y only if term X is the father of term Y, not its grandfather or great-grandfather, etc.
 596   *
 597   * @package WordPress
 598   * @subpackage Taxonomy
 599   * @since 2.3.0
 600   *
 601   * @uses $wpdb
 602   * @uses wp_parse_args() Merges the defaults with those defined by $args and allows for strings.
 603   *
 604   * @param string|array Taxonomy name or list of Taxonomy names
 605   * @param string|array $args The values of what to search for when returning terms
 606   * @return array|WP_Error List of Term Objects and their children. Will return WP_Error, if any of $taxonomies do not exist.
 607   */
 608  function &get_terms($taxonomies, $args = '') {
 609      global $wpdb;
 610      $empty_array = array();
 611  
 612      $single_taxonomy = false;
 613      if ( !is_array($taxonomies) ) {
 614          $single_taxonomy = true;
 615          $taxonomies = array($taxonomies);
 616      }
 617  
 618      foreach ( (array) $taxonomies as $taxonomy ) {
 619          if ( ! is_taxonomy($taxonomy) ) {
 620              $error = & new WP_Error('invalid_taxonomy', __('Invalid Taxonomy'));
 621              return $error;
 622          }
 623      }
 624  
 625      $in_taxonomies = "'" . implode("', '", $taxonomies) . "'";
 626  
 627      $defaults = array('orderby' => 'name', 'order' => 'ASC',
 628          'hide_empty' => true, 'exclude' => '', 'exclude_tree' => '', 'include' => '',
 629          'number' => '', 'fields' => 'all', 'slug' => '', 'parent' => '',
 630          'hierarchical' => true, 'child_of' => 0, 'get' => '', 'name__like' => '',
 631          'pad_counts' => false, 'offset' => '', 'search' => '');
 632      $args = wp_parse_args( $args, $defaults );
 633      $args['number'] = absint( $args['number'] );
 634      $args['offset'] = absint( $args['offset'] );
 635      if ( !$single_taxonomy || !is_taxonomy_hierarchical($taxonomies[0]) ||
 636          '' !== $args['parent'] ) {
 637          $args['child_of'] = 0;
 638          $args['hierarchical'] = false;
 639          $args['pad_counts'] = false;
 640      }
 641  
 642      if ( 'all' == $args['get'] ) {
 643          $args['child_of'] = 0;
 644          $args['hide_empty'] = 0;
 645          $args['hierarchical'] = false;
 646          $args['pad_counts'] = false;
 647      }
 648      extract($args, EXTR_SKIP);
 649  
 650      if ( $child_of ) {
 651          $hierarchy = _get_term_hierarchy($taxonomies[0]);
 652          if ( !isset($hierarchy[$child_of]) )
 653              return $empty_array;
 654      }
 655  
 656      if ( $parent ) {
 657          $hierarchy = _get_term_hierarchy($taxonomies[0]);
 658          if ( !isset($hierarchy[$parent]) )
 659              return $empty_array;
 660      }
 661  
 662      // $args can be whatever, only use the args defined in defaults to compute the key
 663      $filter_key = ( has_filter('list_terms_exclusions') ) ? serialize($GLOBALS['wp_filter']['list_terms_exclusions']) : '';
 664      $key = md5( serialize( compact(array_keys($defaults)) ) . serialize( $taxonomies ) . $filter_key );
 665      $last_changed = wp_cache_get('last_changed', 'terms');
 666      if ( !$last_changed ) {
 667          $last_changed = time();
 668          wp_cache_set('last_changed', $last_changed, 'terms');
 669      }
 670      $cache_key = "get_terms:$key:$last_changed";
 671      $cache = wp_cache_get( $cache_key, 'terms' );
 672      if ( false !== $cache ) {
 673          $cache = apply_filters('get_terms', $cache, $taxonomies, $args);
 674          return $cache;
 675      }
 676  
 677      $_orderby = strtolower($orderby);
 678      if ( 'count' == $_orderby )
 679          $orderby = 'tt.count';
 680      else if ( 'name' == $_orderby )
 681          $orderby = 't.name';
 682      else if ( 'slug' == $_orderby )
 683          $orderby = 't.slug';
 684      else if ( 'term_group' == $_orderby )
 685          $orderby = 't.term_group';
 686      elseif ( empty($_orderby) || 'id' == $_orderby )
 687          $orderby = 't.term_id';
 688  
 689      $orderby = apply_filters( 'get_terms_orderby', $orderby, $args );
 690  
 691      $where = '';
 692      $inclusions = '';
 693      if ( !empty($include) ) {
 694          $exclude = '';
 695          $exclude_tree = '';
 696          $interms = preg_split('/[\s,]+/',$include);
 697          if ( count($interms) ) {
 698              foreach ( (array) $interms as $interm ) {
 699                  if (empty($inclusions))
 700                      $inclusions = ' AND ( t.term_id = ' . intval($interm) . ' ';
 701                  else
 702                      $inclusions .= ' OR t.term_id = ' . intval($interm) . ' ';
 703              }
 704          }
 705      }
 706  
 707      if ( !empty($inclusions) )
 708          $inclusions .= ')';
 709      $where .= $inclusions;
 710  
 711      $exclusions = '';
 712      if ( ! empty( $exclude_tree ) ) {
 713          $excluded_trunks = preg_split('/[\s,]+/',$exclude_tree);
 714          foreach( (array) $excluded_trunks as $extrunk ) {
 715              $excluded_children = (array) get_terms($taxonomies[0], array('child_of' => intval($extrunk), 'fields' => 'ids'));
 716              $excluded_children[] = $extrunk;
 717              foreach( (array) $excluded_children as $exterm ) {
 718                  if ( empty($exclusions) )
 719                      $exclusions = ' AND ( t.term_id <> ' . intval($exterm) . ' ';
 720                  else
 721                      $exclusions .= ' AND t.term_id <> ' . intval($exterm) . ' ';
 722  
 723              }
 724          }
 725      }
 726      if ( !empty($exclude) ) {
 727          $exterms = preg_split('/[\s,]+/',$exclude);
 728          if ( count($exterms) ) {
 729              foreach ( (array) $exterms as $exterm ) {
 730                  if ( empty($exclusions) )
 731                      $exclusions = ' AND ( t.term_id <> ' . intval($exterm) . ' ';
 732                  else
 733                      $exclusions .= ' AND t.term_id <> ' . intval($exterm) . ' ';
 734              }
 735          }
 736      }
 737  
 738      if ( !empty($exclusions) )
 739          $exclusions .= ')';
 740      $exclusions = apply_filters('list_terms_exclusions', $exclusions, $args );
 741      $where .= $exclusions;
 742  
 743      if ( !empty($slug) ) {
 744          $slug = sanitize_title($slug);
 745          $where .= " AND t.slug = '$slug'";
 746      }
 747  
 748      if ( !empty($name__like) )
 749          $where .= " AND t.name LIKE '{$name__like}%'";
 750  
 751      if ( '' !== $parent ) {
 752          $parent = (int) $parent;
 753          $where .= " AND tt.parent = '$parent'";
 754      }
 755  
 756      if ( $hide_empty && !$hierarchical )
 757          $where .= ' AND tt.count > 0';
 758  
 759      // don't limit the query results when we have to descend the family tree
 760      if ( ! empty($number) && ! $hierarchical && empty( $child_of ) && '' === $parent ) {
 761          if( $offset )
 762              $limit = 'LIMIT ' . $offset . ',' . $number;
 763          else
 764              $limit = 'LIMIT ' . $number;
 765  
 766      } else
 767          $limit = '';
 768  
 769      if ( !empty($search) ) {
 770          $search = like_escape($search);
 771          $where .= " AND (t.name LIKE '%$search%')";
 772      }
 773  
 774      $selects = array();
 775      if ( 'all' == $fields )
 776          $selects = array('t.*', 'tt.*');
 777      else if ( 'ids' == $fields )
 778          $selects = array('t.term_id', 'tt.parent', 'tt.count');
 779      else if ( 'names' == $fields )
 780          $selects = array('t.term_id', 'tt.parent', 'tt.count', 't.name');
 781          $select_this = implode(', ', apply_filters( 'get_terms_fields', $selects, $args ));
 782  
 783      $query = "SELECT $select_this FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN ($in_taxonomies) $where ORDER BY $orderby $order $limit";
 784  
 785      $terms = $wpdb->get_results($query);
 786      if ( 'all' == $fields ) {
 787          update_term_cache($terms);
 788      }
 789  
 790      if ( empty($terms) ) {
 791          wp_cache_add( $cache_key, array(), 'terms' );
 792          $terms = apply_filters('get_terms', array(), $taxonomies, $args);
 793          return $terms;
 794      }
 795  
 796      if ( $child_of ) {
 797          $children = _get_term_hierarchy($taxonomies[0]);
 798          if ( ! empty($children) )
 799              $terms = & _get_term_children($child_of, $terms, $taxonomies[0]);
 800      }
 801  
 802      // Update term counts to include children.
 803      if ( $pad_counts && 'all' == $fields )
 804          _pad_term_counts($terms, $taxonomies[0]);
 805  
 806      // Make sure we show empty categories that have children.
 807      if ( $hierarchical && $hide_empty && is_array($terms) ) {
 808          foreach ( $terms as $k => $term ) {
 809              if ( ! $term->count ) {
 810                  $children = _get_term_children($term->term_id, $terms, $taxonomies[0]);
 811                  if( is_array($children) )
 812                      foreach ( $children as $child )
 813                          if ( $child->count )
 814                              continue 2;
 815  
 816                  // It really is empty
 817                  unset($terms[$k]);
 818              }
 819          }
 820      }
 821      reset ( $terms );
 822  
 823      $_terms = array();
 824      if ( 'ids' == $fields ) {
 825          while ( $term = array_shift($terms) )
 826              $_terms[] = $term->term_id;
 827          $terms = $_terms;
 828      } elseif ( 'names' == $fields ) {
 829          while ( $term = array_shift($terms) )
 830              $_terms[] = $term->name;
 831          $terms = $_terms;
 832      }
 833  
 834      if ( 0 < $number && intval(@count($terms)) > $number ) {
 835          $terms = array_slice($terms, $offset, $number);
 836      }
 837  
 838      wp_cache_add( $cache_key, $terms, 'terms' );
 839  
 840      $terms = apply_filters('get_terms', $terms, $taxonomies, $args);
 841      return $terms;
 842  }
 843  
 844  /**
 845   * Check if Term exists.
 846   *
 847   * Returns the index of a defined term, or 0 (false) if the term doesn't exist.
 848   *
 849   * @package WordPress
 850   * @subpackage Taxonomy
 851   * @since 2.3.0
 852   *
 853   * @uses $wpdb
 854   *
 855   * @param int|string $term The term to check
 856   * @param string $taxonomy The taxonomy name to use
 857   * @param int $parent ID of parent term under which to confine the exists search.
 858   * @return mixed Get the term id or Term Object, if exists.
 859   */
 860  function is_term($term, $taxonomy = '', $parent = 0) {
 861      global $wpdb;
 862  
 863      $select = "SELECT term_id FROM $wpdb->terms as t WHERE ";
 864      $tax_select = "SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE ";
 865  
 866      if ( is_int($term) ) {
 867          if ( 0 == $term )
 868              return 0;
 869          $where = 't.term_id = %d';
 870          if ( !empty($taxonomy) )
 871              return $wpdb->get_row( $wpdb->prepare( $tax_select . $where . " AND tt.taxonomy = %s", $term, $taxonomy ), ARRAY_A );
 872          else
 873              return $wpdb->get_var( $wpdb->prepare( $select . $where, $term ) );
 874      }
 875  
 876      $term = trim( stripslashes( $term ) );
 877  
 878      if ( '' === $slug = sanitize_title($term) )
 879          return 0;
 880  
 881      $where = 't.slug = %s';
 882      $else_where = 't.name = %s';
 883      $where_fields = array($slug);
 884      $else_where_fields = array($term);
 885      if ( !empty($taxonomy) ) {
 886          $parent = (int) $parent;
 887          if ( $parent > 0 ) {
 888              $where_fields[] = $parent;
 889              $else_where_fields[] = $parent;
 890              $where .= ' AND tt.parent = %d';
 891              $else_where .= ' AND tt.parent = %d';
 892          }
 893  
 894          $where_fields[] = $taxonomy;
 895          $else_where_fields[] = $taxonomy;
 896  
 897          if ( $result = $wpdb->get_row( $wpdb->prepare("SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE $where AND tt.taxonomy = %s", $where_fields), ARRAY_A) )
 898              return $result;
 899  
 900          return $wpdb->get_row( $wpdb->prepare("SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE $else_where AND tt.taxonomy = %s", $else_where_fields), ARRAY_A);
 901      }
 902  
 903      if ( $result = $wpdb->get_var( $wpdb->prepare("SELECT term_id FROM $wpdb->terms as t WHERE $where", $where_fields) ) )
 904          return $result;
 905  
 906      return $wpdb->get_var( $wpdb->prepare("SELECT term_id FROM $wpdb->terms as t WHERE $else_where", $else_where_fields) );
 907  }
 908  
 909  /**
 910   * Sanitize Term all fields.
 911   *
 912   * Relys on sanitize_term_field() to sanitize the term. The difference is that
 913   * this function will sanitize <strong>all</strong> fields. The context is based
 914   * on sanitize_term_field().
 915   *
 916   * The $term is expected to be either an array or an object.
 917   *
 918   * @package WordPress
 919   * @subpackage Taxonomy
 920   * @since 2.3.0
 921   *
 922   * @uses sanitize_term_field Used to sanitize all fields in a term
 923   *
 924   * @param array|object $term The term to check
 925   * @param string $taxonomy The taxonomy name to use
 926   * @param string $context Default is 'display'.
 927   * @return array|object Term with all fields sanitized
 928   */
 929  function sanitize_term($term, $taxonomy, $context = 'display') {
 930  
 931      if ( 'raw' == $context )
 932          return $term;
 933  
 934      $fields = array('term_id', 'name', 'description', 'slug', 'count', 'parent', 'term_group');
 935  
 936      $do_object = false;
 937      if ( is_object($term) )
 938          $do_object = true;
 939  
 940      $term_id = $do_object ? $term->term_id : (isset($term['term_id']) ? $term['term_id'] : 0);
 941  
 942      foreach ( (array) $fields as $field ) {
 943          if ( $do_object ) {
 944              if ( isset($term->$field) )
 945                  $term->$field = sanitize_term_field($field, $term->$field, $term_id, $taxonomy, $context);
 946          } else {
 947              if ( isset($term[$field]) )
 948                  $term[$field] = sanitize_term_field($field, $term[$field], $term_id, $taxonomy, $context);
 949          }
 950      }
 951  
 952      if ( $do_object )
 953          $term->filter = $context;
 954      else
 955          $term['filter'] = $context;
 956  
 957      return $term;
 958  }
 959  
 960  /**
 961   * Cleanse the field value in the term based on the context.
 962   *
 963   * Passing a term field value through the function should be assumed to have
 964   * cleansed the value for whatever context the term field is going to be used.
 965   *
 966   * If no context or an unsupported context is given, then default filters will
 967   * be applied.
 968   *
 969   * There are enough filters for each context to support a custom filtering
 970   * without creating your own filter function. Simply create a function that
 971   * hooks into the filter you need.
 972   *
 973   * @package WordPress
 974   * @subpackage Taxonomy
 975   * @since 2.3.0
 976   *
 977   * @uses $wpdb
 978   *
 979   * @param string $field Term field to sanitize
 980   * @param string $value Search for this term value
 981   * @param int $term_id Term ID
 982   * @param string $taxonomy Taxonomy Name
 983   * @param string $context Either edit, db, display, attribute, or js.
 984   * @return mixed sanitized field
 985   */
 986  function sanitize_term_field($field, $value, $term_id, $taxonomy, $context) {
 987      if ( 'parent' == $field  || 'term_id' == $field || 'count' == $field || 'term_group' == $field ) {
 988          $value = (int) $value;
 989          if ( $value < 0 )
 990              $value = 0;
 991      }
 992  
 993      if ( 'raw' == $context )
 994          return $value;
 995  
 996      if ( 'edit' == $context ) {
 997          $value = apply_filters("edit_term_$field", $value, $term_id, $taxonomy);
 998          $value = apply_filters("edit_$taxonomy}_$field", $value, $term_id);
 999          if ( 'description' == $field )
1000              $value = format_to_edit($value);
1001          else
1002              $value = esc_attr($value);
1003      } else if ( 'db' == $context ) {
1004          $value = apply_filters("pre_term_$field", $value, $taxonomy);
1005          $value = apply_filters("pre_$taxonomy}_$field", $value);
1006          // Back compat filters
1007          if ( 'slug' == $field )
1008              $value = apply_filters('pre_category_nicename', $value);
1009  
1010      } else if ( 'rss' == $context ) {
1011          $value = apply_filters("term_$field}_rss", $value, $taxonomy);
1012          $value = apply_filters("$taxonomy}_$field}_rss", $value);
1013      } else {
1014          // Use display filters by default.
1015          $value = apply_filters("term_$field", $value, $term_id, $taxonomy, $context);
1016          $value = apply_filters("$taxonomy}_$field", $value, $term_id, $context);
1017      }
1018  
1019      if ( 'attribute' == $context )
1020          $value = esc_attr($value);
1021      else if ( 'js' == $context )
1022          $value = esc_js($value);
1023  
1024      return $value;
1025  }
1026  
1027  /**
1028   * Count how many terms are in Taxonomy.
1029   *
1030   * Default $args is 'ignore_empty' which can be <code>'ignore_empty=true'</code>
1031   * or <code>array('ignore_empty' => true);</code>.
1032   *
1033   * @package WordPress
1034   * @subpackage Taxonomy
1035   * @since 2.3.0
1036   *
1037   * @uses $wpdb
1038   * @uses wp_parse_args() Turns strings into arrays and merges defaults into an array.
1039   *
1040   * @param string $taxonomy Taxonomy name
1041   * @param array|string $args Overwrite defaults
1042   * @return int How many terms are in $taxonomy
1043   */
1044  function wp_count_terms( $taxonomy, $args = array() ) {
1045      global $wpdb;
1046  
1047      $defaults = array('ignore_empty' => false);
1048      $args = wp_parse_args($args, $defaults);
1049      extract($args, EXTR_SKIP);
1050  
1051      $where = '';
1052      if ( $ignore_empty )
1053          $where = 'AND count > 0';
1054  
1055      return $wpdb->get_var( $wpdb->prepare("SELECT COUNT(*) FROM $wpdb->term_taxonomy WHERE taxonomy = %s $where", $taxonomy) );
1056  }
1057  
1058  /**
1059   * Will unlink the term from the taxonomy.
1060   *
1061   * Will remove the term's relationship to the taxonomy, not the term or taxonomy
1062   * itself. The term and taxonomy will still exist. Will require the term's
1063   * object ID to perform the operation.
1064   *
1065   * @package WordPress
1066   * @subpackage Taxonomy
1067   * @since 2.3.0
1068   * @uses $wpdb
1069   *
1070   * @param int $object_id The term Object Id that refers to the term
1071   * @param string|array $taxonomy List of Taxonomy Names or single Taxonomy name.
1072   */
1073  function wp_delete_object_term_relationships( $object_id, $taxonomies ) {
1074      global $wpdb;
1075  
1076      $object_id = (int) $object_id;
1077  
1078      if ( !is_array($taxonomies) )
1079          $taxonomies = array($taxonomies);
1080  
1081      foreach ( (array) $taxonomies as $taxonomy ) {
1082          $tt_ids = wp_get_object_terms($object_id, $taxonomy, 'fields=tt_ids');
1083          $in_tt_ids = "'" . implode("', '", $tt_ids) . "'";
1084          do_action( 'delete_term_relationships', $object_id, $tt_ids );
1085          $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id IN ($in_tt_ids)", $object_id) );
1086          do_action( 'deleted_term_relationships', $object_id, $tt_ids );
1087          wp_update_term_count($tt_ids, $taxonomy);
1088      }
1089  }
1090  
1091  /**
1092   * Removes a term from the database.
1093   *
1094   * If the term is a parent of other terms, then the children will be updated to
1095   * that term's parent.
1096   *
1097   * The $args 'default' will only override the terms found, if there is only one
1098   * term found. Any other and the found terms are used.
1099   *
1100   * The $args 'force_default' will force the term supplied as default to be
1101   * assigned even if the object was not going to be termless
1102   * @package WordPress
1103   * @subpackage Taxonomy
1104   * @since 2.3.0
1105   *
1106   * @uses $wpdb
1107   * @uses do_action() Calls both 'delete_term' and 'delete_$taxonomy' action
1108   *    hooks, passing term object, term id. 'delete_term' gets an additional
1109   *    parameter with the $taxonomy parameter.
1110   *
1111   * @param int $term Term ID
1112   * @param string $taxonomy Taxonomy Name
1113   * @param array|string $args Optional. Change 'default' term id and override found term ids.
1114   * @return bool|WP_Error Returns false if not term; true if completes delete action.
1115   */
1116  function wp_delete_term( $term, $taxonomy, $args = array() ) {
1117      global $wpdb;
1118  
1119      $term = (int) $term;
1120  
1121      if ( ! $ids = is_term($term, $taxonomy) )
1122          return false;
1123      if ( is_wp_error( $ids ) )
1124          return $ids;
1125  
1126      $tt_id = $ids['term_taxonomy_id'];
1127  
1128      $defaults = array();
1129      $args = wp_parse_args($args, $defaults);
1130      extract($args, EXTR_SKIP);
1131  
1132      if ( isset($default) ) {
1133          $default = (int) $default;
1134          if ( ! is_term($default, $taxonomy) )
1135              unset($default);
1136      }
1137  
1138      // Update children to point to new parent
1139      if ( is_taxonomy_hierarchical($taxonomy) ) {
1140          $term_obj = get_term($term, $taxonomy);
1141          if ( is_wp_error( $term_obj ) )
1142              return $term_obj;
1143          $parent = $term_obj->parent;
1144  
1145          $edit_tt_ids = $wpdb->get_col( "SELECT `term_taxonomy_id` FROM $wpdb->term_taxonomy WHERE `parent` = " . (int)$term_obj->term_id );
1146          do_action( 'edit_term_taxonomies', $edit_tt_ids );
1147          $wpdb->update( $wpdb->term_taxonomy, compact( 'parent' ), array( 'parent' => $term_obj->term_id) + compact( 'taxonomy' ) );
1148          do_action( 'edited_term_taxonomies', $edit_tt_ids );
1149      }
1150  
1151      $objects = $wpdb->get_col( $wpdb->prepare( "SELECT object_id FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $tt_id ) );
1152  
1153      foreach ( (array) $objects as $object ) {
1154          $terms = wp_get_object_terms($object, $taxonomy, array('fields' => 'ids', 'orderby' => 'none'));
1155          if ( 1 == count($terms) && isset($default) ) {
1156              $terms = array($default);
1157          } else {
1158              $terms = array_diff($terms, array($term));
1159              if (isset($default) && isset($force_default) && $force_default)
1160                  $terms = array_merge($terms, array($default));
1161          }
1162          $terms = array_map('intval', $terms);
1163          wp_set_object_terms($object, $terms, $taxonomy);
1164      }
1165  
1166      do_action( 'delete_term_taxonomy', $tt_id );
1167      $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->term_taxonomy WHERE term_taxonomy_id = %d", $tt_id ) );
1168      do_action( 'deleted_term_taxonomy', $tt_id );
1169  
1170      // Delete the term if no taxonomies use it.
1171      if ( !$wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_taxonomy WHERE term_id = %d", $term) ) )
1172          $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->terms WHERE term_id = %d", $term) );
1173  
1174      clean_term_cache($term, $taxonomy);
1175  
1176      do_action('delete_term', $term, $tt_id, $taxonomy);
1177      do_action("delete_$taxonomy", $term, $tt_id);
1178  
1179      return true;
1180  }
1181  
1182  /**
1183   * Retrieves the terms associated with the given object(s), in the supplied taxonomies.
1184   *
1185   * The following information has to do the $args parameter and for what can be
1186   * contained in the string or array of that parameter, if it exists.
1187   *
1188   * The first argument is called, 'orderby' and has the default value of 'name'.
1189   * The other value that is supported is 'count'.
1190   *
1191   * The second argument is called, 'order' and has the default value of 'ASC'.
1192   * The only other value that will be acceptable is 'DESC'.
1193   *
1194   * The final argument supported is called, 'fields' and has the default value of
1195   * 'all'. There are multiple other options that can be used instead. Supported
1196   * values are as follows: 'all', 'ids', 'names', and finally
1197   * 'all_with_object_id'.
1198   *
1199   * The fields argument also decides what will be returned. If 'all' or
1200   * 'all_with_object_id' is choosen or the default kept intact, then all matching
1201   * terms objects will be returned. If either 'ids' or 'names' is used, then an
1202   * array of all matching term ids or term names will be returned respectively.
1203   *
1204   * @package WordPress
1205   * @subpackage Taxonomy
1206   * @since 2.3.0
1207   * @uses $wpdb
1208   *
1209   * @param int|array $object_id The id of the object(s) to retrieve.
1210   * @param string|array $taxonomies The taxonomies to retrieve terms from.
1211   * @param array|string $args Change what is returned
1212   * @return array|WP_Error The requested term data or empty array if no terms found. WP_Error if $taxonomy does not exist.
1213   */
1214  function wp_get_object_terms($object_ids, $taxonomies, $args = array()) {
1215      global $wpdb;
1216  
1217      if ( !is_array($taxonomies) )
1218          $taxonomies = array($taxonomies);
1219  
1220      foreach ( (array) $taxonomies as $taxonomy ) {
1221          if ( ! is_taxonomy($taxonomy) )
1222              return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy'));
1223      }
1224  
1225      if ( !is_array($object_ids) )
1226          $object_ids = array($object_ids);
1227      $object_ids = array_map('intval', $object_ids);
1228  
1229      $defaults = array('orderby' => 'name', 'order' => 'ASC', 'fields' => 'all');
1230      $args = wp_parse_args( $args, $defaults );
1231  
1232      $terms = array();
1233      if ( count($taxonomies) > 1 ) {
1234          foreach ( $taxonomies as $index => $taxonomy ) {
1235              $t = get_taxonomy($taxonomy);
1236              if ( isset($t->args) && is_array($t->args) && $args != array_merge($args, $t->args) ) {
1237                  unset($taxonomies[$index]);
1238                  $terms = array_merge($terms, wp_get_object_terms($object_ids, $taxonomy, array_merge($args, $t->args)));
1239              }
1240          }
1241      } else {
1242          $t = get_taxonomy($taxonomies[0]);
1243          if ( isset($t->args) && is_array($t->args) )
1244              $args = array_merge($args, $t->args);
1245      }
1246  
1247      extract($args, EXTR_SKIP);
1248  
1249      if ( 'count' == $orderby )
1250          $orderby = 'tt.count';
1251      else if ( 'name' == $orderby )
1252          $orderby = 't.name';
1253      else if ( 'slug' == $orderby )
1254          $orderby = 't.slug';
1255      else if ( 'term_group' == $orderby )
1256          $orderby = 't.term_group';
1257      else if ( 'term_order' == $orderby )
1258          $orderby = 'tr.term_order';
1259      else if ( 'none' == $orderby ) {
1260          $orderby = '';
1261          $order = '';
1262      } else {
1263          $orderby = 't.term_id';
1264      }
1265  
1266      // tt_ids queries can only be none or tr.term_taxonomy_id
1267      if ( ('tt_ids' == $fields) && !empty($orderby) )
1268          $orderby = 'tr.term_taxonomy_id';
1269  
1270      if ( !empty($orderby) )
1271          $orderby = "ORDER BY $orderby";
1272  
1273      $taxonomies = "'" . implode("', '", $taxonomies) . "'";
1274      $object_ids = implode(', ', $object_ids);
1275  
1276      $select_this = '';
1277      if ( 'all' == $fields )
1278          $select_this = 't.*, tt.*';
1279      else if ( 'ids' == $fields )
1280          $select_this = 't.term_id';
1281      else if ( 'names' == $fields )
1282          $select_this = 't.name';
1283      else if ( 'all_with_object_id' == $fields )
1284          $select_this = 't.*, tt.*, tr.object_id';
1285  
1286      $query = "SELECT $select_this FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON tt.term_id = t.term_id INNER JOIN $wpdb->term_relationships AS tr ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ($taxonomies) AND tr.object_id IN ($object_ids) $orderby $order";
1287  
1288      if ( 'all' == $fields || 'all_with_object_id' == $fields ) {
1289          $terms = array_merge($terms, $wpdb->get_results($query));
1290          update_term_cache($terms);
1291      } else if ( 'ids' == $fields || 'names' == $fields ) {
1292          $terms = array_merge($terms, $wpdb->get_col($query));
1293      } else if ( 'tt_ids' == $fields ) {
1294          $terms = $wpdb->get_col("SELECT tr.term_taxonomy_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tr.object_id IN ($object_ids) AND tt.taxonomy IN ($taxonomies) $orderby $order");
1295      }
1296  
1297      if ( ! $terms )
1298          $terms = array();
1299  
1300      return apply_filters('wp_get_object_terms', $terms, $object_ids, $taxonomies, $args);
1301  }
1302  
1303  /**
1304   * Adds a new term to the database. Optionally marks it as an alias of an existing term.
1305   *
1306   * Error handling is assigned for the nonexistance of the $taxonomy and $term
1307   * parameters before inserting. If both the term id and taxonomy exist
1308   * previously, then an array will be returned that contains the term id and the
1309   * contents of what is returned. The keys of the array are 'term_id' and
1310   * 'term_taxonomy_id' containing numeric values.
1311   *
1312   * It is assumed that the term does not yet exist or the above will apply. The
1313   * term will be first added to the term table and then related to the taxonomy
1314   * if everything is well. If everything is correct, then several actions will be
1315   * run prior to a filter and then several actions will be run after the filter
1316   * is run.
1317   *
1318   * The arguments decide how the term is handled based on the $args parameter.
1319   * The following is a list of the available overrides and the defaults.
1320   *
1321   * 'alias_of'. There is no default, but if added, expected is the slug that the
1322   * term will be an alias of. Expected to be a string.
1323   *
1324   * 'description'. There is no default. If exists, will be added to the database
1325   * along with the term. Expected to be a string.
1326   *
1327   * 'parent'. Expected to be numeric and default is 0 (zero). Will assign value
1328   * of 'parent' to the term.
1329   *
1330   * 'slug'. Expected to be a string. There is no default.
1331   *
1332   * If 'slug' argument exists then the slug will be checked to see if it is not
1333   * a valid term. If that check succeeds (it is not a valid term), then it is
1334   * added and the term id is given. If it fails, then a check is made to whether
1335   * the taxonomy is hierarchical and the parent argument is not empty. If the
1336   * second check succeeds, the term will be inserted and the term id will be
1337   * given.
1338   *
1339   * @package WordPress
1340   * @subpackage Taxonomy
1341   * @since 2.3.0
1342   * @uses $wpdb
1343   *
1344   * @uses do_action() Calls 'create_term' hook with the term id and taxonomy id as parameters.
1345   * @uses do_action() Calls 'create_$taxonomy' hook with term id and taxonomy id as parameters.
1346   * @uses apply_filters() Calls 'term_id_filter' hook with term id and taxonomy id as parameters.
1347   * @uses do_action() Calls 'created_term' hook with the term id and taxonomy id as parameters.
1348   * @uses do_action() Calls 'created_$taxonomy' hook with term id and taxonomy id as parameters.
1349   *
1350   * @param int|string $term The term to add or update.
1351   * @param string $taxonomy The taxonomy to which to add the term
1352   * @param array|string $args Change the values of the inserted term
1353   * @return array|WP_Error The Term ID and Term Taxonomy ID
1354   */
1355  function wp_insert_term( $term, $taxonomy, $args = array() ) {
1356      global $wpdb;
1357  
1358      if ( ! is_taxonomy($taxonomy) )
1359          return new WP_Error('invalid_taxonomy', __('Invalid taxonomy'));
1360  
1361      if ( is_int($term) && 0 == $term )
1362          return new WP_Error('invalid_term_id', __('Invalid term ID'));
1363  
1364      if ( '' == trim($term) )
1365          return new WP_Error('empty_term_name', __('A name is required for this term'));
1366  
1367      $defaults = array( 'alias_of' => '', 'description' => '', 'parent' => 0, 'slug' => '');
1368      $args = wp_parse_args($args, $defaults);
1369      $args['name'] = $term;
1370      $args['taxonomy'] = $taxonomy;
1371      $args = sanitize_term($args, $taxonomy, 'db');
1372      extract($args, EXTR_SKIP);
1373  
1374      // expected_slashed ($name)
1375      $name = stripslashes($name);
1376      $description = stripslashes($description);
1377  
1378      if ( empty($slug) )
1379          $slug = sanitize_title($name);
1380  
1381      $term_group = 0;
1382      if ( $alias_of ) {
1383          $alias = $wpdb->get_row( $wpdb->prepare( "SELECT term_id, term_group FROM $wpdb->terms WHERE slug = %s", $alias_of) );
1384          if ( $alias->term_group ) {
1385              // The alias we want is already in a group, so let's use that one.
1386              $term_group = $alias->term_group;
1387          } else {
1388              // The alias isn't in a group, so let's create a new one and firstly add the alias term to it.
1389              $term_group = $wpdb->get_var("SELECT MAX(term_group) FROM $wpdb->terms") + 1;
1390              do_action( 'edit_terms', $alias->term_id );
1391              $wpdb->update($wpdb->terms, compact('term_group'), array('term_id' => $alias->term_id) );
1392              do_action( 'edited_terms', $alias->term_id );
1393          }
1394      }
1395  
1396      if ( ! $term_id = is_term($slug) ) {
1397          if ( false === $wpdb->insert( $wpdb->terms, compact( 'name', 'slug', 'term_group' ) ) )
1398              return new WP_Error('db_insert_error', __('Could not insert term into the database'), $wpdb->last_error);
1399          $term_id = (int) $wpdb->insert_id;
1400      } else if ( is_taxonomy_hierarchical($taxonomy) && !empty($parent) ) {
1401          // If the taxonomy supports hierarchy and the term has a parent, make the slug unique
1402          // by incorporating parent slugs.
1403          $slug = wp_unique_term_slug($slug, (object) $args);
1404          if ( false === $wpdb->insert( $wpdb->terms, compact( 'name', 'slug', 'term_group' ) ) )
1405              return new WP_Error('db_insert_error', __('Could not insert term into the database'), $wpdb->last_error);
1406          $term_id = (int) $wpdb->insert_id;
1407      }
1408  
1409      if ( empty($slug) ) {
1410          $slug = sanitize_title($slug, $term_id);
1411          do_action( 'edit_terms', $term_id );
1412          $wpdb->update( $wpdb->terms, compact( 'slug' ), compact( 'term_id' ) );
1413          do_action( 'edited_terms', $term_id );
1414      }
1415  
1416      $tt_id = $wpdb->get_var( $wpdb->prepare( "SELECT tt.term_taxonomy_id FROM $wpdb->term_taxonomy AS tt INNER JOIN $wpdb->terms AS t ON tt.term_id = t.term_id WHERE tt.taxonomy = %s AND t.term_id = %d", $taxonomy, $term_id ) );
1417  
1418      if ( !empty($tt_id) )
1419          return array('term_id' => $term_id, 'term_taxonomy_id' => $tt_id);
1420  
1421      $wpdb->insert( $wpdb->term_taxonomy, compact( 'term_id', 'taxonomy', 'description', 'parent') + array( 'count' => 0 ) );
1422      $tt_id = (int) $wpdb->insert_id;
1423  
1424      do_action("create_term", $term_id, $tt_id, $taxonomy);
1425      do_action("create_$taxonomy", $term_id, $tt_id);
1426  
1427      $term_id = apply_filters('term_id_filter', $term_id, $tt_id);
1428  
1429      clean_term_cache($term_id, $taxonomy);
1430  
1431      do_action("created_term", $term_id, $tt_id, $taxonomy);
1432      do_action("created_$taxonomy", $term_id, $tt_id);
1433  
1434      return array('term_id' => $term_id, 'term_taxonomy_id' => $tt_id);
1435  }
1436  
1437  /**
1438   * Create Term and Taxonomy Relationships.
1439   *
1440   * Relates an object (post, link etc) to a term and taxonomy type. Creates the
1441   * term and taxonomy relationship if it doesn't already exist. Creates a term if
1442   * it doesn't exist (using the slug).
1443   *
1444   * A relationship means that the term is grouped in or belongs to the taxonomy.
1445   * A term has no meaning until it is given context by defining which taxonomy it
1446   * exists under.
1447   *
1448   * @package WordPress
1449   * @subpackage Taxonomy
1450   * @since 2.3.0
1451   * @uses $wpdb
1452   *
1453   * @param int $object_id The object to relate to.
1454   * @param array|int|string $term The slug or id of the term, will replace all existing
1455   * related terms in this taxonomy.
1456   * @param array|string $taxonomy The context in which to relate the term to the object.
1457   * @param bool $append If false will delete difference of terms.
1458   * @return array|WP_Error Affected Term IDs
1459   */
1460  function wp_set_object_terms($object_id, $terms, $taxonomy, $append = false) {
1461      global $wpdb;
1462  
1463      $object_id = (int) $object_id;
1464  
1465      if ( ! is_taxonomy($taxonomy) )
1466          return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy'));
1467  
1468      if ( !is_array($terms) )
1469          $terms = array($terms);
1470  
1471      if ( ! $append )
1472          $old_tt_ids =  wp_get_object_terms($object_id, $taxonomy, array('fields' => 'tt_ids', 'orderby' => 'none'));
1473  
1474      $tt_ids = array();
1475      $term_ids = array();
1476  
1477      foreach ( (array) $terms as $term) {
1478          if ( !strlen(trim($term)) )
1479              continue;
1480  
1481          if ( !$term_info = is_term($term, $taxonomy) )
1482              $term_info = wp_insert_term($term, $taxonomy);
1483          if ( is_wp_error($term_info) )
1484              return $term_info;
1485          $term_ids[] = $term_info['term_id'];
1486          $tt_id = $term_info['term_taxonomy_id'];
1487          $tt_ids[] = $tt_id;
1488  
1489          if ( $wpdb->get_var( $wpdb->prepare( "SELECT term_taxonomy_id FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id = %d", $object_id, $tt_id ) ) )
1490              continue;
1491          do_action( 'add_term_relationship', $object_id, $tt_id );
1492          $wpdb->insert( $wpdb->term_relationships, array( 'object_id' => $object_id, 'term_taxonomy_id' => $tt_id ) );
1493          do_action( 'added_term_relationship', $object_id, $tt_id );
1494      }
1495  
1496      wp_update_term_count($tt_ids, $taxonomy);
1497  
1498      if ( ! $append ) {
1499          $delete_terms = array_diff($old_tt_ids, $tt_ids);
1500          if ( $delete_terms ) {
1501              $in_delete_terms = "'" . implode("', '", $delete_terms) . "'";
1502              do_action( 'delete_term_relationships', $object_id, $delete_terms );
1503              $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id IN ($in_delete_terms)", $object_id) );
1504              do_action( 'deleted_term_relationships', $object_id, $delete_terms );
1505              wp_update_term_count($delete_terms, $taxonomy);
1506          }
1507      }
1508  
1509      $t = get_taxonomy($taxonomy);
1510      if ( ! $append && isset($t->sort) && $t->sort ) {
1511          $values = array();
1512          $term_order = 0;
1513          $final_tt_ids = wp_get_object_terms($object_id, $taxonomy, 'fields=tt_ids');
1514          foreach ( $tt_ids as $tt_id )
1515              if ( in_array($tt_id, $final_tt_ids) )
1516                  $values[] = $wpdb->prepare( "(%d, %d, %d)", $object_id, $tt_id, ++$term_order);
1517          if ( $values )
1518              $wpdb->query("INSERT INTO $wpdb->term_relationships (object_id, term_taxonomy_id, term_order) VALUES " . join(',', $values) . " ON DUPLICATE KEY UPDATE term_order = VALUES(term_order)");
1519      }
1520  
1521      do_action('set_object_terms', $object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids);
1522      return $tt_ids;
1523  }
1524  
1525  /**
1526   * Will make slug unique, if it isn't already.
1527   *
1528   * The $slug has to be unique global to every taxonomy, meaning that one
1529   * taxonomy term can't have a matching slug with another taxonomy term. Each
1530   * slug has to be globally unique for every taxonomy.
1531   *
1532   * The way this works is that if the taxonomy that the term belongs to is
1533   * heirarchical and has a parent, it will append that parent to the $slug.
1534   *
1535   * If that still doesn't return an unique slug, then it try to append a number
1536   * until it finds a number that is truely unique.
1537   *
1538   * The only purpose for $term is for appending a parent, if one exists.
1539   *
1540   * @package WordPress
1541   * @subpackage Taxonomy
1542   * @since 2.3.0
1543   * @uses $wpdb
1544   *
1545   * @param string $slug The string that will be tried for a unique slug
1546   * @param object $term The term object that the $slug will belong too
1547   * @return string Will return a true unique slug.
1548   */
1549  function wp_unique_term_slug($slug, $term) {
1550      global $wpdb;
1551  
1552      // If the taxonomy supports hierarchy and the term has a parent, make the slug unique
1553      // by incorporating parent slugs.
1554      if ( is_taxonomy_hierarchical($term->taxonomy) && !empty($term->parent) ) {
1555          $the_parent = $term->parent;
1556          while ( ! empty($the_parent) ) {
1557              $parent_term = get_term($the_parent, $term->taxonomy);
1558              if ( is_wp_error($parent_term) || empty($parent_term) )
1559                  break;
1560                  $slug .= '-' . $parent_term->slug;
1561              if ( empty($parent_term->parent) )
1562                  break;
1563              $the_parent = $parent_term->parent;
1564          }
1565      }
1566  
1567      // If we didn't get a unique slug, try appending a number to make it unique.
1568      if ( !empty($args['term_id']) )
1569          $query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s AND term_id != %d", $slug, $args['term_id'] );
1570      else
1571          $query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $slug );
1572  
1573      if ( $wpdb->get_var( $query ) ) {
1574          $num = 2;
1575          do {
1576              $alt_slug = $slug . "-$num";
1577              $num++;
1578              $slug_check = $wpdb->get_var( $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $alt_slug ) );
1579          } while ( $slug_check );
1580          $slug = $alt_slug;
1581      }
1582  
1583      return $slug;
1584  }
1585  
1586  /**
1587   * Update term based on arguments provided.
1588   *
1589   * The $args will indiscriminately override all values with the same field name.
1590   * Care must be taken to not override important information need to update or
1591   * update will fail (or perhaps create a new term, neither would be acceptable).
1592   *
1593   * Defaults will set 'alias_of', 'description', 'parent', and 'slug' if not
1594   * defined in $args already.
1595   *
1596   * 'alias_of' will create a term group, if it doesn't already exist, and update
1597   * it for the $term.
1598   *
1599   * If the 'slug' argument in $args is missing, then the 'name' in $args will be
1600   * used. It should also be noted that if you set 'slug' and it isn't unique then
1601   * a WP_Error will be passed back. If you don't pass any slug, then a unique one
1602   * will be created for you.
1603   *
1604   * For what can be overrode in $args, check the term scheme can contain and stay
1605   * away from the term keys.
1606   *
1607   * @package WordPress
1608   * @subpackage Taxonomy
1609   * @since 2.3.0
1610   *
1611   * @uses $wpdb
1612   * @uses do_action() Will call both 'edit_term' and 'edit_$taxonomy' twice.
1613   * @uses apply_filters() Will call the 'term_id_filter' filter and pass the term
1614   *    id and taxonomy id.
1615   *
1616   * @param int $term_id The ID of the term
1617   * @param string $taxonomy The context in which to relate the term to the object.
1618   * @param array|string $args Overwrite term field values
1619   * @return array|WP_Error Returns Term ID and Taxonomy Term ID
1620   */
1621  function wp_update_term( $term_id, $taxonomy, $args = array() ) {
1622      global $wpdb;
1623  
1624      if ( ! is_taxonomy($taxonomy) )
1625          return new WP_Error('invalid_taxonomy', __('Invalid taxonomy'));
1626  
1627      $term_id = (int) $term_id;
1628  
1629      // First, get all of the original args
1630      $term = get_term ($term_id, $taxonomy, ARRAY_A);
1631  
1632      if ( is_wp_error( $term ) )
1633          return $term;
1634  
1635      // Escape data pulled from DB.
1636      $term = add_magic_quotes($term);
1637  
1638      // Merge old and new args with new args overwriting old ones.
1639      $args = array_merge($term, $args);
1640  
1641      $defaults = array( 'alias_of' => '', 'description' => '', 'parent' => 0, 'slug' => '');
1642      $args = wp_parse_args($args, $defaults);
1643      $args = sanitize_term($args, $taxonomy, 'db');
1644      extract($args, EXTR_SKIP);
1645  
1646      // expected_slashed ($name)
1647      $name = stripslashes($name);
1648      $description = stripslashes($description);
1649  
1650      if ( '' == trim($name) )
1651          return new WP_Error('empty_term_name', __('A name is required for this term'));
1652  
1653      $empty_slug = false;
1654      if ( empty($slug) ) {
1655          $empty_slug = true;
1656          $slug = sanitize_title($name);
1657      }
1658  
1659      if ( $alias_of ) {
1660          $alias = $wpdb->get_row( $wpdb->prepare( "SELECT term_id, term_group FROM $wpdb->terms WHERE slug = %s", $alias_of) );
1661          if ( $alias->term_group ) {
1662              // The alias we want is already in a group, so let's use that one.
1663              $term_group = $alias->term_group;
1664          } else {
1665              // The alias isn't in a group, so let's create a new one and firstly add the alias term to it.
1666              $term_group = $wpdb->get_var("SELECT MAX(term_group) FROM $wpdb->terms") + 1;
1667              do_action( 'edit_terms', $alias->term_id );
1668              $wpdb->update( $wpdb->terms, compact('term_group'), array( 'term_id' => $alias->term_id ) );
1669              do_action( 'edited_terms', $alias->term_id );
1670          }
1671      }
1672  
1673      // Check for duplicate slug
1674      $id = $wpdb->get_var( $wpdb->prepare( "SELECT term_id FROM $wpdb->terms WHERE slug = %s", $slug ) );
1675      if ( $id && ($id != $term_id) ) {
1676          // If an empty slug was passed or the parent changed, reset the slug to something unique.
1677          // Otherwise, bail.
1678          if ( $empty_slug || ( $parent != $term->parent) )
1679              $slug = wp_unique_term_slug($slug, (object) $args);
1680          else
1681              return new WP_Error('duplicate_term_slug', sprintf(__('The slug &#8220;%s&#8221; is already in use by another term'), $slug));
1682      }
1683      do_action( 'edit_terms', $term_id );
1684      $wpdb->update($wpdb->terms, compact( 'name', 'slug', 'term_group' ), compact( 'term_id' ) );
1685      if ( empty($slug) ) {
1686          $slug = sanitize_title($name, $term_id);
1687          $wpdb->update( $wpdb->terms, compact( 'slug' ), compact( 'term_id' ) );
1688      }
1689      do_action( 'edited_terms', $term_id );
1690  
1691      $tt_id = $wpdb->get_var( $wpdb->prepare( "SELECT tt.term_taxonomy_id FROM $wpdb->term_taxonomy AS tt INNER JOIN $wpdb->terms AS t ON tt.term_id = t.term_id WHERE tt.taxonomy = %s AND t.term_id = %d", $taxonomy, $term_id) );
1692      do_action( 'edit_term_taxonomy', $tt_id );
1693      $wpdb->update( $wpdb->term_taxonomy, compact( 'term_id', 'taxonomy', 'description', 'parent' ), array( 'term_taxonomy_id' => $tt_id ) );
1694      do_action( 'edited_term_taxonomy', $tt_id );
1695  
1696      do_action("edit_term", $term_id, $tt_id, $taxonomy);
1697      do_action("edit_$taxonomy", $term_id, $tt_id);
1698  
1699      $term_id = apply_filters('term_id_filter', $term_id, $tt_id);
1700  
1701      clean_term_cache($term_id, $taxonomy);
1702  
1703      do_action("edited_term", $term_id, $tt_id, $taxonomy);
1704      do_action("edited_$taxonomy", $term_id, $tt_id);
1705  
1706      return array('term_id' => $term_id, 'term_taxonomy_id' => $tt_id);
1707  }
1708  
1709  /**
1710   * Enable or disable term counting.
1711   *
1712   * @since 2.5.0
1713   *
1714   * @param bool $defer Optional. Enable if true, disable if false.
1715   * @return bool Whether term counting is enabled or disabled.
1716   */
1717  function wp_defer_term_counting($defer=null) {
1718      static $_defer = false;
1719  
1720      if ( is_bool($defer) ) {
1721          $_defer = $defer;
1722          // flush any deferred counts
1723          if ( !$defer )
1724              wp_update_term_count( null, null, true );
1725      }
1726  
1727      return $_defer;
1728  }
1729  
1730  /**
1731   * Updates the amount of terms in taxonomy.
1732   *
1733   * If there is a taxonomy callback applyed, then it will be called for updating
1734   * the count.
1735   *
1736   * The default action is to count what the amount of terms have the relationship
1737   * of term ID. Once that is done, then update the database.
1738   *
1739   * @package WordPress
1740   * @subpackage Taxonomy
1741   * @since 2.3.0
1742   * @uses $wpdb
1743   *
1744   * @param int|array $terms The term_taxonomy_id of the terms
1745   * @param string $taxonomy The context of the term.
1746   * @return bool If no terms will return false, and if successful will return true.
1747   */
1748  function wp_update_term_count( $terms, $taxonomy, $do_deferred=false ) {
1749      static $_deferred = array();
1750  
1751      if ( $do_deferred ) {
1752          foreach ( (array) array_keys($_deferred) as $tax ) {
1753              wp_update_term_count_now( $_deferred[$tax], $tax );
1754              unset( $_deferred[$tax] );
1755          }
1756      }
1757  
1758      if ( empty($terms) )
1759          return false;
1760  
1761      if ( !is_array($terms) )
1762          $terms = array($terms);
1763  
1764      if ( wp_defer_term_counting() ) {
1765          if ( !isset($_deferred[$taxonomy]) )
1766              $_deferred[$taxonomy] = array();
1767          $_deferred[$taxonomy] = array_unique( array_merge($_deferred[$taxonomy], $terms) );
1768          return true;
1769      }
1770  
1771      return wp_update_term_count_now( $terms, $taxonomy );
1772  }
1773  
1774  /**
1775   * Perform term count update immediately.
1776   *
1777   * @since 2.5.0
1778   *
1779   * @param array $terms The term_taxonomy_id of terms to update.
1780   * @param string $taxonomy The context of the term.
1781   * @return bool Always true when complete.
1782   */
1783  function wp_update_term_count_now( $terms, $taxonomy ) {
1784      global $wpdb;
1785  
1786      $terms = array_map('intval', $terms);
1787  
1788      $taxonomy = get_taxonomy($taxonomy);
1789      if ( !empty($taxonomy->update_count_callback) ) {
1790          call_user_func($taxonomy->update_count_callback, $terms);
1791      } else {
1792          // Default count updater
1793          foreach ( (array) $terms as $term) {
1794              $count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $term) );
1795              do_action( 'edit_term_taxonomy', $term );
1796              $wpdb->update( $wpdb->term_taxonomy, compact( 'count' ), array( 'term_taxonomy_id' => $term ) );
1797              do_action( 'edited_term_taxonomy', $term );
1798          }
1799  
1800      }
1801  
1802      clean_term_cache($terms);
1803  
1804      return true;
1805  }
1806  
1807  //
1808  // Cache
1809  //
1810  
1811  
1812  /**
1813   * Removes the taxonomy relationship to terms from the cache.
1814   *
1815   * Will remove the entire taxonomy relationship containing term $object_id. The
1816   * term IDs have to exist within the taxonomy $object_type for the deletion to
1817   * take place.
1818   *
1819   * @package WordPress
1820   * @subpackage Taxonomy
1821   * @since 2.3.0
1822   *
1823   * @see get_object_taxonomies() for more on $object_type
1824   * @uses do_action() Will call action hook named, 'clean_object_term_cache' after completion.
1825   *    Passes, function params in same order.
1826   *
1827   * @param int|array $object_ids Single or list of term object ID(s)
1828   * @param array|string $object_type The taxonomy object type
1829   */
1830  function clean_object_term_cache($object_ids, $object_type) {
1831      if ( !is_array($object_ids) )
1832          $object_ids = array($object_ids);
1833  
1834      foreach ( $object_ids as $id )
1835          foreach ( get_object_taxonomies($object_type) as $taxonomy )
1836              wp_cache_delete($id, "{$taxonomy}_relationships");
1837  
1838      do_action('clean_object_term_cache', $object_ids, $object_type);
1839  }
1840  
1841  
1842  /**
1843   * Will remove all of the term ids from the cache.
1844   *
1845   * @package WordPress
1846   * @subpackage Taxonomy
1847   * @since 2.3.0
1848   * @uses $wpdb
1849   *
1850   * @param int|array $ids Single or list of Term IDs
1851   * @param string $taxonomy Can be empty and will assume tt_ids, else will use for context.
1852   */
1853  function clean_term_cache($ids, $taxonomy = '') {
1854      global $wpdb;
1855      static $cleaned = array();
1856  
1857      if ( !is_array($ids) )
1858          $ids = array($ids);
1859  
1860      $taxonomies = array();
1861      // If no taxonomy, assume tt_ids.
1862      if ( empty($taxonomy) ) {
1863          $tt_ids = implode(', ', $ids);
1864          $terms = $wpdb->get_results("SELECT term_id, taxonomy FROM $wpdb->term_taxonomy WHERE term_taxonomy_id IN ($tt_ids)");
1865          foreach ( (array) $terms as $term ) {
1866              $taxonomies[] = $term->taxonomy;
1867              wp_cache_delete($term->term_id, $term->taxonomy);
1868          }
1869          $taxonomies = array_unique($taxonomies);
1870      } else {
1871          foreach ( $ids as $id ) {
1872              wp_cache_delete($id, $taxonomy);
1873          }
1874          $taxonomies = array($taxonomy);
1875      }
1876  
1877      foreach ( $taxonomies as $taxonomy ) {
1878          if ( isset($cleaned[$taxonomy]) )
1879              continue;
1880          $cleaned[$taxonomy] = true;
1881          wp_cache_delete('all_ids', $taxonomy);
1882          wp_cache_delete('get', $taxonomy);
1883          delete_option("{$taxonomy}_children");
1884      }
1885  
1886      wp_cache_set('last_changed', time(), 'terms');
1887  
1888      do_action('clean_term_cache', $ids, $taxonomy);
1889  }
1890  
1891  
1892  /**
1893   * Retrieves the taxonomy relationship to the term object id.
1894   *
1895   * @package WordPress
1896   * @subpackage Taxonomy
1897   * @since 2.3.0
1898   *
1899   * @uses wp_cache_get() Retrieves taxonomy relationship from cache
1900   *
1901   * @param int|array $id Term object ID
1902   * @param string $taxonomy Taxonomy Name
1903   * @return bool|array Empty array if $terms found, but not $taxonomy. False if nothing is in cache for $taxonomy and $id.
1904   */
1905  function &get_object_term_cache($id, $taxonomy) {
1906      $cache = wp_cache_get($id, "{$taxonomy}_relationships");
1907      return $cache;
1908  }
1909  
1910  
1911  /**
1912   * Updates the cache for Term ID(s).
1913   *
1914   * Will only update the cache for terms not already cached.
1915   *
1916   * The $object_ids expects that the ids be separated by commas, if it is a
1917   * string.
1918   *
1919   * It should be noted that update_object_term_cache() is very time extensive. It
1920   * is advised that the function is not called very often or at least not for a
1921   * lot of terms that exist in a lot of taxonomies. The amount of time increases
1922   * for each term and it also increases for each taxonomy the term belongs to.
1923   *
1924   * @package WordPress
1925   * @subpackage Taxonomy
1926   * @since 2.3.0
1927   * @uses wp_get_object_terms() Used to get terms from the database to update
1928   *
1929   * @param string|array $object_ids Single or list of term object ID(s)
1930   * @param array|string $object_type The taxonomy object type
1931   * @return null|bool Null value is given with empty $object_ids. False if
1932   */
1933  function update_object_term_cache($object_ids, $object_type) {
1934      if ( empty($object_ids) )
1935          return;
1936  
1937      if ( !is_array($object_ids) )
1938          $object_ids = explode(',', $object_ids);
1939  
1940      $object_ids = array_map('intval', $object_ids);
1941  
1942      $taxonomies = get_object_taxonomies($object_type);
1943  
1944      $ids = array();
1945      foreach ( (array) $object_ids as $id ) {
1946          foreach ( $taxonomies as $taxonomy ) {
1947              if ( false === wp_cache_get($id, "{$taxonomy}_relationships") ) {
1948                  $ids[] = $id;
1949                  break;
1950              }
1951          }
1952      }
1953  
1954      if ( empty( $ids ) )
1955          return false;
1956  
1957      $terms = wp_get_object_terms($ids, $taxonomies, 'fields=all_with_object_id');
1958  
1959      $object_terms = array();
1960      foreach ( (array) $terms as $term )
1961          $object_terms[$term->object_id][$term->taxonomy][$term->term_id] = $term;
1962  
1963      foreach ( $ids as $id ) {
1964          foreach ( $taxonomies  as $taxonomy ) {
1965              if ( ! isset($object_terms[$id][$taxonomy]) ) {
1966                  if ( !isset($object_terms[$id]) )
1967                      $object_terms[$id] = array();
1968                  $object_terms[$id][$taxonomy] = array();
1969              }
1970          }
1971      }
1972  
1973      foreach ( $object_terms as $id => $value ) {
1974          foreach ( $value as $taxonomy => $terms ) {
1975              wp_cache_set($id, $terms, "{$taxonomy}_relationships");
1976          }
1977      }
1978  }
1979  
1980  
1981  /**
1982   * Updates Terms to Taxonomy in cache.
1983   *
1984   * @package WordPress
1985   * @subpackage Taxonomy
1986   * @since 2.3.0
1987   *
1988   * @param array $terms List of Term objects to change
1989   * @param string $taxonomy Optional. Update Term to this taxonomy in cache
1990   */
1991  function update_term_cache($terms, $taxonomy = '') {
1992      foreach ( (array) $terms as $term ) {
1993          $term_taxonomy = $taxonomy;
1994          if ( empty($term_taxonomy) )
1995              $term_taxonomy = $term->taxonomy;
1996  
1997          wp_cache_add($term->term_id, $term, $term_taxonomy);
1998      }
1999  }
2000  
2001  //
2002  // Private
2003  //
2004  
2005  
2006  /**
2007   * Retrieves children of taxonomy as Term IDs.
2008   *
2009   * @package WordPress
2010   * @subpackage Taxonomy
2011   * @access private
2012   * @since 2.3.0
2013   *
2014   * @uses update_option() Stores all of the children in "$taxonomy_children"
2015   *     option. That is the name of the taxonomy, immediately followed by '_children'.
2016   *
2017   * @param string $taxonomy Taxonomy Name
2018   * @return array Empty if $taxonomy isn't hierarachical or returns children as Term IDs.
2019   */
2020  function _get_term_hierarchy($taxonomy) {
2021      if ( !is_taxonomy_hierarchical($taxonomy) )
2022          return array();
2023      $children = get_option("{$taxonomy}_children");
2024      if ( is_array($children) )
2025          return $children;
2026  
2027      $children = array();
2028      $terms = get_terms($taxonomy, 'get=all');
2029      foreach ( $terms as $term ) {
2030          if ( $term->parent > 0 )
2031              $children[$term->parent][] = $term->term_id;
2032      }
2033      update_option("{$taxonomy}_children", $children);
2034  
2035      return $children;
2036  }
2037  
2038  
2039  /**
2040   * Get the subset of $terms that are descendants of $term_id.
2041   *
2042   * If $terms is an array of objects, then _get_term_children returns an array of objects.
2043   * If $terms is an array of IDs, then _get_term_children returns an array of IDs.
2044   *
2045   * @package WordPress
2046   * @subpackage Taxonomy
2047   * @access private
2048   * @since 2.3.0
2049   *
2050   * @param int $term_id The ancestor term: all returned terms should be descendants of $term_id.
2051   * @param array $terms The set of terms---either an array of term objects or term IDs---from which those that are descendants of $term_id will be chosen.
2052   * @param string $taxonomy The taxonomy which determines the hierarchy of the terms.
2053   * @return array The subset of $terms that are descendants of $term_id.
2054   */
2055  function &_get_term_children($term_id, $terms, $taxonomy) {
2056      $empty_array = array();
2057      if ( empty($terms) )
2058          return $empty_array;
2059  
2060      $term_list = array();
2061      $has_children = _get_term_hierarchy($taxonomy);
2062  
2063      if  ( ( 0 != $term_id ) && ! isset($has_children[$term_id]) )
2064          return $empty_array;
2065  
2066      foreach ( (array) $terms as $term ) {
2067          $use_id = false;
2068          if ( !is_object($term) ) {
2069              $term = get_term($term, $taxonomy);
2070              if ( is_wp_error( $term ) )
2071                  return $term;
2072              $use_id = true;
2073          }
2074  
2075          if ( $term->term_id == $term_id )
2076              continue;
2077  
2078          if ( $term->parent == $term_id ) {
2079              if ( $use_id )
2080                  $term_list[] = $term->term_id;
2081              else
2082                  $term_list[] = $term;
2083  
2084              if ( !isset($has_children[$term->term_id]) )
2085                  continue;
2086  
2087              if ( $children = _get_term_children($term->term_id, $terms, $taxonomy) )
2088                  $term_list = array_merge($term_list, $children);
2089          }
2090      }
2091  
2092      return $term_list;
2093  }
2094  
2095  
2096  /**
2097   * Add count of children to parent count.
2098   *
2099   * Recalculates term counts by including items from child terms. Assumes all
2100   * relevant children are already in the $terms argument.
2101   *
2102   * @package WordPress
2103   * @subpackage Taxonomy
2104   * @access private
2105   * @since 2.3.0
2106   * @uses $wpdb
2107   *
2108   * @param array $terms List of Term IDs
2109   * @param string $taxonomy Term Context
2110   * @return null Will break from function if conditions are not met.
2111   */
2112  function _pad_term_counts(&$terms, $taxonomy) {
2113      global $wpdb;
2114  
2115      // This function only works for hierarchical taxonomies like post categories.
2116      if ( !is_taxonomy_hierarchical( $taxonomy ) )
2117          return;
2118  
2119      $term_hier = _get_term_hierarchy($taxonomy);
2120  
2121      if ( empty($term_hier) )
2122          return;
2123  
2124      $term_items = array();
2125  
2126      foreach ( (array) $terms as $key => $term ) {
2127          $terms_by_id[$term->term_id] = & $terms[$key];
2128          $term_ids[$term->term_taxonomy_id] = $term->term_id;
2129      }
2130  
2131      // Get the object and term ids and stick them in a lookup table
2132      $results = $wpdb->get_results("SELECT object_id, term_taxonomy_id FROM $wpdb->term_relationships INNER JOIN $wpdb->posts ON object_id = ID WHERE term_taxonomy_id IN (".join(',', array_keys($term_ids)).") AND post_type = 'post' AND post_status = 'publish'");
2133      foreach ( $results as $row ) {
2134          $id = $term_ids[$row->term_taxonomy_id];
2135          $term_items[$id][$row->object_id] = isset($term_items[$id][$row->object_id]) ? ++$term_items[$id][$row->object_id] : 1;
2136      }
2137  
2138      // Touch every ancestor's lookup row for each post in each term
2139      foreach ( $term_ids as $term_id ) {
2140          $child = $term_id;
2141          while ( $parent = $terms_by_id[$child]->parent ) {
2142              if ( !empty($term_items[$term_id]) )
2143                  foreach ( $term_items[$term_id] as $item_id => $touches ) {
2144                      $term_items[$parent][$item_id] = isset($term_items[$parent][$item_id]) ? ++$term_items[$parent][$item_id]: 1;
2145                  }
2146              $child = $parent;
2147          }
2148      }
2149  
2150      // Transfer the touched cells
2151      foreach ( (array) $term_items as $id => $items )
2152          if ( isset($terms_by_id[$id]) )
2153              $terms_by_id[$id]->count = count($items);
2154  }
2155  
2156  //
2157  // Default callbacks
2158  //
2159  
2160  /**
2161   * Will update term count based on posts.
2162   *
2163   * Private function for the default callback for post_tag and category
2164   * taxonomies.
2165   *
2166   * @package WordPress
2167   * @subpackage Taxonomy
2168   * @access private
2169   * @since 2.3.0
2170   * @uses $wpdb
2171   *
2172   * @param array $terms List of Term taxonomy IDs
2173   */
2174  function _update_post_term_count( $terms ) {
2175      global $wpdb;
2176  
2177      foreach ( (array) $terms as $term ) {
2178          $count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships, $wpdb->posts WHERE $wpdb->posts.ID = $wpdb->term_relationships.object_id AND post_status = 'publish' AND post_type = 'post' AND term_taxonomy_id = %d", $term ) );
2179          do_action( 'edit_term_taxonomy', $term );
2180          $wpdb->update( $wpdb->term_taxonomy, compact( 'count' ), array( 'term_taxonomy_id' => $term ) );
2181          do_action( 'edited_term_taxonomy', $term );
2182      }
2183  }
2184  
2185  
2186  /**
2187   * Generates a permalink for a taxonomy term archive.
2188   *
2189   * @since 2.5.0
2190   *
2191   * @param object|int|string $term
2192   * @param string $taxonomy
2193   * @return string HTML link to taxonomy term archive
2194   */
2195  function get_term_link( $term, $taxonomy ) {
2196      global $wp_rewrite;
2197  
2198      if ( !is_object($term) ) {
2199          if ( is_int($term) ) {
2200              $term = &get_term($term, $taxonomy);
2201          } else {
2202              $term = &get_term_by('slug', $term, $taxonomy);
2203          }
2204      }
2205      if ( is_wp_error( $term ) )
2206          return $term;
2207  
2208      // use legacy functions for core taxonomies until they are fully plugged in
2209      if ( $taxonomy == 'category' )
2210          return get_category_link((int) $term->term_id);
2211      if ( $taxonomy == 'post_tag' )
2212          return get_tag_link((int) $term->term_id);
2213  
2214      $termlink = $wp_rewrite->get_extra_permastruct($taxonomy);
2215  
2216      $slug = $term->slug;
2217  
2218      if ( empty($termlink) ) {
2219          $file = trailingslashit( get_option('home') );
2220          $t = get_taxonomy($taxonomy);
2221          if ( $t->query_var )
2222              $termlink = "$file?$t->query_var=$slug";
2223          else
2224              $termlink = "$file?taxonomy=$taxonomy&term=$slug";
2225      } else {
2226          $termlink = str_replace("%$taxonomy%", $slug, $termlink);
2227          $termlink = get_option('home') . user_trailingslashit($termlink, 'category');
2228      }
2229      return apply_filters('term_link', $termlink, $term, $taxonomy);
2230  }
2231  
2232  /**
2233   * Display the taxonomies of a post with available options.
2234   *
2235   * This function can be used within the loop to display the taxonomies for a
2236   * post without specifying the Post ID. You can also use it outside the Loop to
2237   * display the taxonomies for a specific post.
2238   *
2239   * The available defaults are:
2240   * 'post' : default is 0. The post ID to get taxonomies of.
2241   * 'before' : default is empty string. Display before taxonomies list.
2242   * 'sep' : default is empty string. Separate every taxonomy with value in this.
2243   * 'after' : default is empty string. Display this after the taxonomies list.
2244   *
2245   * @since 2.5.0
2246   * @uses get_the_taxonomies()
2247   *
2248   * @param array $args Override the defaults.
2249   */
2250  function the_taxonomies($args = array()) {
2251      $defaults = array(
2252          'post' => 0,
2253          'before' => '',
2254          'sep' => ' ',
2255          'after' => '',
2256      );
2257  
2258      $r = wp_parse_args( $args, $defaults );
2259      extract( $r, EXTR_SKIP );
2260  
2261      echo $before . join($sep, get_the_taxonomies($post)) . $after;
2262  }
2263  
2264  /**
2265   * Retrieve all taxonomies associated with a post.
2266   *
2267   * This function can be used within the loop. It will also return an array of
2268   * the taxonomies with links to the taxonomy and name.
2269   *
2270   * @since 2.5.0
2271   *
2272   * @param int $post Optional. Post ID or will use Global Post ID (in loop).
2273   * @return array
2274   */
2275  function get_the_taxonomies($post = 0) {
2276      if ( is_int($post) )
2277          $post =& get_post($post);
2278      elseif ( !is_object($post) )
2279          $post =& $GLOBALS['post'];
2280  
2281      $taxonomies = array();
2282  
2283      if ( !$post )
2284          return $taxonomies;
2285  
2286      $template = apply_filters('taxonomy_template', '%s: %l.');
2287  
2288      foreach ( get_object_taxonomies($post) as $taxonomy ) {
2289          $t = (array) get_taxonomy($taxonomy);
2290          if ( empty($t['label']) )
2291              $t['label'] = $taxonomy;
2292          if ( empty($t['args']) )
2293              $t['args'] = array();
2294          if ( empty($t['template']) )
2295              $t['template'] = $template;
2296  
2297          $terms = get_object_term_cache($post->ID, $taxonomy);
2298          if ( empty($terms) )
2299              $terms = wp_get_object_terms($post->ID, $taxonomy, $t['args']);
2300  
2301          $links = array();
2302  
2303          foreach ( $terms as $term )
2304              $links[] = "<a href='" . esc_attr(get_term_link($term, $taxonomy)) . "'>$term->name</a>";
2305  
2306          if ( $links )
2307              $taxonomies[$taxonomy] = wp_sprintf($t['template'], $t['label'], $links, $terms);
2308      }
2309      return $taxonomies;
2310  }
2311  
2312  /**
2313   * Retrieve all taxonomies of a post with just the names.
2314   *
2315   * @since 2.5.0
2316   * @uses get_object_taxonomies()
2317   *
2318   * @param int $post Optional. Post ID
2319   * @return array
2320   */
2321  function get_post_taxonomies($post = 0) {
2322      $post =& get_post($post);
2323  
2324      return get_object_taxonomies($post);
2325  }
2326  
2327  /**
2328   * Determine if the given object is associated with any of the given terms.
2329   *
2330   * The given terms are checked against the object's terms' term_ids, names and slugs.
2331   * Terms given as integers will only be checked against the object's terms' term_ids.
2332   * If no terms are given, determines if object is associated with any terms in the given taxonomy.
2333   *
2334   * @since 2.7.0
2335   * @uses get_object_term_cache()
2336   * @uses wp_get_object_terms()
2337   *
2338   * @param int $object_id.  ID of the object (post ID, link ID, ...)
2339   * @param string $taxonomy.  Single taxonomy name
2340   * @param int|string|array $terms Optional.  Term term_id, name, slug or array of said
2341   * @return bool|WP_Error. WP_Error on input error.
2342   */
2343  function is_object_in_term( $object_id, $taxonomy, $terms = null ) {
2344      if ( !$object_id = (int) $object_id )
2345          return new WP_Error( 'invalid_object', __( 'Invalid object ID' ) );
2346  
2347      $object_terms = get_object_term_cache( $object_id, $taxonomy );
2348      if ( empty( $object_terms ) )
2349           $object_terms = wp_get_object_terms( $object_id, $taxonomy );
2350  
2351      if ( is_wp_error( $object_terms ) )
2352          return $object_terms;
2353      if ( empty( $object_terms ) )
2354          return false;
2355      if ( empty( $terms ) )
2356          return ( !empty( $object_terms ) );
2357  
2358      $terms = (array) $terms;
2359  
2360      if ( $ints = array_filter( $terms, 'is_int' ) )
2361          $strs = array_diff( $terms, $ints );
2362      else
2363          $strs =& $terms;
2364  
2365      foreach ( $object_terms as $object_term ) {
2366          if ( $ints && in_array( $object_term->term_id, $ints ) ) return true; // If int, check against term_id
2367          if ( $strs ) {
2368              if ( in_array( $object_term->term_id, $strs ) ) return true;
2369              if ( in_array( $object_term->name, $strs ) )    return true;
2370              if ( in_array( $object_term->slug, $strs ) )    return true;
2371          }
2372      }
2373  
2374      return false;
2375  }
2376  
2377  ?>