如何格式化英国银行的分类代码？

Question

As part of a form I collect a users bank details which includes their sort code. The sort code is stored in the database as six numbers, for example 771731 .

I'd prefer to store the sort code in this format (without the hyphens) as it makes it easier for me to work with in other areas of the site. I want to output the sort code in one area of the site but in the format 77-17-31 using PHP.

I have searched Google for a solution but surprisingly found very little.

Answer 1

This is the prefect use-case for wordwrap() , just use it like this:

$code = "771731";
echo wordwrap($code, 2, "-", TRUE);

output:

77-17-31

Answer 2

Just figured this out using PHP functions, thought I'd post the answer in case it helped anyone else doing a Google search...

function formatSortCode($str) {
    return implode("-", str_split($str, 2));
}

echo formatSortCode('771731'); // outputs 77-17-31

Answer 3

I arrived here looking for a JavaScript answer not realising it was a PHP question. Tweaking @MichaelLB's answer, the JavaScript translation is

function formatSortCode(str) {
    return (String(str).match(/.{1,2}/g) || []).join('-');
}

formatSortCode(123456789);

>>> "12-34-56-78-9"