taxonomy_select_nodes

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Definition

taxonomy_select_nodes($tids = array(), $operator = 'or', $depth = 0, $pager = TRUE)
modules/taxonomy.module, line 823

Description

Finds all nodes that match selected taxonomy conditions.

Parameters

$tids An array of term IDs to match.

$operator How to interpret multiple IDs in the array. Can be "or" or "and".

$depth How many levels deep to traverse the taxonomy tree. Can be a nonnegative integer or "all".

$pager Whether the nodes are to be used with a pager (the case on most Drupal pages) or not (in an XML feed, for example).

Return value

A resource identifier pointing to the query results.

Code

<?php
function taxonomy_select_nodes($tids = array(), $operator = 'or', $depth = 0, $pager = TRUE) {
  if (count($tids) > 0) {
    // For each term ID, generate an array of descendant term IDs to the right depth.
    $descendant_tids = array();
    if ($depth === 'all') {
      $depth = NULL;
    }
    foreach ($tids as $index => $tid) {
      $term = taxonomy_get_term($tid);
      $tree = taxonomy_get_tree($term->vid, $tid, -1, $depth);
      $descendant_tids[] = array_merge(array($tid), array_map('_taxonomy_get_tid_from_term', $tree));
    }

    if ($operator == 'or') {
      $str_tids = implode(',', call_user_func_array('array_merge', $descendant_tids));
      $sql = 'SELECT DISTINCT(n.nid), n.sticky, n.title, n.created FROM {node} n INNER JOIN {term_node} tn ON n.nid = tn.nid WHERE tn.tid IN ('. $str_tids .') AND n.status = 1 ORDER BY n.sticky DESC, n.created DESC';
      $sql_count = 'SELECT COUNT(DISTINCT(n.nid)) FROM {node} n INNER JOIN {term_node} tn ON n.nid = tn.nid WHERE tn.tid IN ('. $str_tids .') AND n.status = 1';
    }
    else {
      $joins = '';
      $wheres = '';
      foreach ($descendant_tids as $index => $tids) {
        $joins .= ' INNER JOIN {term_node} tn'. $index .' ON n.nid = tn'. $index .'.nid';
        $wheres .= ' AND tn'. $index .'.tid IN ('. implode(',', $tids) .')';
      }
      $sql = 'SELECT DISTINCT(n.nid), n.sticky, n.title, n.created FROM {node} n '. $joins .' WHERE n.status = 1 '. $wheres .' ORDER BY n.sticky DESC, n.created DESC';
      $sql_count = 'SELECT COUNT(DISTINCT(n.nid)) FROM {node} n '. $joins .' WHERE n.status = 1 ' . $wheres;
    }
    $sql = db_rewrite_sql($sql);
    $sql_count = db_rewrite_sql($sql_count);
    if ($pager) {
      $result = pager_query($sql, variable_get('default_nodes_main', 10), 0, $sql_count);
    }
    else {
      $result = db_query_range($sql, 0, 15);
    }
  }

  return $result;
}
?>