Method to encapsulate numbers into 6 to 8 character limit

Question

public static function generateReceiptNumber(int $id)
{
     $receipt_number = sprintf(' d', $id % 100000000);
     return $receipt_number;
}

I am using the above code to convert the incoming $id to a minimum 6 digit, maximum 8 digit number. For example: 000001 - 99999999

But there is a flaw in this code. When $id equals 100000000, it will return 000000. How should I improve the above code to return 000001?

By analogy, $id is the auto-incremented ID of the database.

The reason I want to achieve this is because I have a display text box with a text limit of only 8 digits and I can only count the numbers back up from 000001 and keep repeating.

Answer 1

public static function generateReceiptNumber(int $id)
{
    // 处理特殊情况，当$id为100000000时     if ($id === 100000000) {
        return '000001';
    }

    // 使用取模运算将ID限制在范围0到99,999,99     $limited_id = $id % 100000000;
    
    // 格式化限制的ID，使用前导零确保至少6位     $receipt_number = sprintf('%06d', $limited_id);
    
    return $receipt_number;
}

Please see if this answer helps

Answer 2

How about this:

function generateReceiptNumber(int $id)
{
    while($id>=100000000)
        $id -= 100000000 - 1;
    return sprintf('%06d', $id);
}