Piwik\Plugins\API\API::getMostFrequentValues PHP Метод

    private function getMostFrequentValues($values)
    {
        // remove false values (while keeping zeros)
        $values = array_filter($values, 'strlen');
        // array_count_values requires strings or integer, convert floats to string (mysqli)
        foreach ($values as &$value) {
            if (is_numeric($value)) {
                $value = (string) round($value, 3);
            }
        }
        // we have a list of all values. let's show the most frequently used first.
        $values = array_count_values($values);
        arsort($values);
        $values = array_keys($values);
        return $values;
    }