Mask credit card number in PHP

Question

I have credit card number which I want to mask as below:

$cc = 1234123412341234

echo cc_masking($cc)

1234XXXXXXXX1234

function cc_masking($number) {.....}         


        

Answer 1

I was looking for some code similar. So I found the code below. I hope can help.

function mask($val, $mask)
{
    $maskared = '';

    $k = 0;

    for ($i = 0; $i <= strlen($mask) - 1; $i++) {
        if ($mask[$i] == '#') {
            if (isset($val[$k]))
                $maskared .= $val[$k++];
        } else {
            if (isset($mask[$i]))
                $maskared .= $mask[$i];
        }
    }

    return $maskared;
}

Sample:

echo mask(11111111111, "###.###.###-##"); // 111.111.111-11
echo mask(11111111111, "#####-###"); // 111111-111
echo mask(11111111111, anything); // 111111-111