JBZoo\Utils\Str::zeroPad PHP Method

    public static function zeroPad($number, $length)
    {
        return str_pad($number, $length, '0', STR_PAD_LEFT);
    }

 public function testZeroPad()
 {
     is('341', Str::zeroPad('0341', 1));
     is('341', Str::zeroPad(341, 3));
     is('0341', Str::zeroPad(341, 4));
     is('000341', Str::zeroPad(341, 6));
 }