chamilo / chamilo-lms

        $stored_terms = $this->get_terms_on_db($prefix, $course_code, $tool_id, $ref_id_high_level);

        // don't do anything if no change, verify only at DB, not the search engine

        if ((count(array_diff($terms, $stored_terms)) == 0) &&

            (count(array_diff($stored_terms, $terms)) == 0)

        ) {

            return false;

        }

        $stored_terms = $this->get_common_index_terms_by_prefix($prefix);

        // Don't do anything if no change, verify only at DB, not the search engine.

        if ((count(array_diff($terms, $stored_terms)) == 0) && (count(array_diff($stored_terms, $terms)) == 0))

            return false;

        require_once 'xapian.php'; // TODO: Try catch every xapian use or make wrappers on API.

        require_once api_get_path(LIBRARY_PATH).'search/ChamiloIndexer.class.php';