protected function asString($number, $digits = 2) {
		$number = (string)$number;
		$count = mb_strlen($number);
		while ($count < $digits) {
			$number = '0' . $number;
			$count++;
		}
		return $number;
	}
protected function asString($number, $digits = 2) {
		$number = (string)$number;
		$count = mb_strlen($number);
		while ($count < $digits) {
			$number = '0' . $number;
			$count++;
		}
		return $number;
	}
protected function asString ( $ number , $ digits = 2 ) { $ number = ( string ) $ number ; $ count = mb_strlen ( $ number ) ; while ( $ count < $ digits ) { $ number = '0' . $ number ; $ count ++ ; } return $ number ; }
Converts integer to x-digit string
1 => 01, 12 => 12

@param int $number
@param int $digits
@return string
Converts integer to x - digit string 1 = > 01 12 = > 12