protected function padLeft(string $value, int $length): string
    {
        return str_pad($value, $length, '0', STR_PAD_LEFT);
    }
protected function padLeft(string $value, int $length): string
    {
        return str_pad($value, $length, '0', STR_PAD_LEFT);
    }
protected function padLeft ( string $ value , int $ length ) : string { return str_pad ( $ value , $ length , '0' , STR_PAD_LEFT ) ; }
Pad a string with zeros to the left.

@param string $value  The string to be padded
@param int    $length The length to pad

@return string The padded string
Pad a string with zeros to the left .