Random::getStringByAlphabet

static function getStringByAlphabet($length, $alphabet, $requireAll = false)
{
	$charsetList = static::getCharsetsforAlphabet($alphabet);

	if($requireAll && count($charsetList) > 1)
	{
		return static::getStringByArray($length, $charsetList);
	}
	else
	{
		return static::getStringByCharsets($length, implode("", $charsetList));
	}
}