RainLab\Pages\Classes\Snippet::dropDownOptionsToString PHP Method

    protected static function dropDownOptionsToString($optionsArray)
    {
        $result = [];
        $isAssoc = (bool) count(array_filter(array_keys($optionsArray), 'is_string'));
        foreach ($optionsArray as $optionIndex => $optionValue) {
            $result[] = $isAssoc ? $optionIndex . ':' . $optionValue : $optionValue;
        }
        return implode(' | ', $result);
    }