protected function Database::eliminateDuplicates in Search API 8

Eliminates duplicate keys from a keyword array.

Used as a helper method in prepareKeys().

Parameters

array $keys: The keywords to parse.

array $words: (optional) A cache of all encountered words so far. Used internally for recursive invocations.

Return value

array The processed keywords.

1 call to Database::eliminateDuplicates()

Database::prepareKeys in modules/search_api_db/src/Plugin/search_api/backend/Database.php

Removes nested expressions and phrase groupings from the search keys.

File

modules/search_api_db/src/Plugin/search_api/backend/Database.php, line 1921

Class

Database

Indexes and searches items using the database.

Namespace

Drupal\search_api_db\Plugin\search_api\backend

Code

protected function eliminateDuplicates(array $keys, array &$words = []) {
  foreach ($keys as $i => $word) {
    if (!Element::child($i)) {
      continue;
    }
    if (is_scalar($word)) {
      if (isset($words[$word])) {
        unset($keys[$i]);
      }
      else {
        $words[$word] = TRUE;
      }
    }
    else {
      $keys[$i] = $this
        ->eliminateDuplicates($word, $words);
    }
  }
  return $keys;
}