bp_dd_get_random_groups_ids( int $count = 1, string $output = 'array' )

function bp_dd_get_random_groups_ids( $count = 1, $output = 'array' ) {
	$groups_arr = (array) bp_get_option( 'bp_dd_imported_group_ids' );

	if ( ! empty( $groups_arr ) ) {
		$total_groups = count( $groups_arr );
		if ( $count <= 0 || $count > $total_groups ) {
			$count = $total_groups;
		}

		// Get random groups.
		$random_keys = (array) array_rand( $groups_arr, $count );
		$groups      = array();
		foreach ( $groups_arr as $key => $value ) {
			if ( in_array( $key, $random_keys ) ) {
				$groups[] = $value;
			}
		}
	} else {
		global $wpdb;
		$bp = buddypress();

		$limit = '';
		if ( $count > 0 ) {
			$limit = 'LIMIT ' . (int) $count;
		}

		$groups = $wpdb->get_col( "SELECT id FROM {$bp->groups->table_name} ORDER BY rand() {$limit}" );
	}

	/**
	 * Convert to integers, because get_col() returns array of strings.
	 */
	$groups = array_map( 'intval', $groups );

	if ( $output === 'string' ) {
		return implode( ',', $groups );
	}

	return $groups;
}