How to mask parts of a string with the asterisk character

Question

I want to get a phone number in this format

Your phone number ********8898 has been sent with a verification code..

PHP

Possible duplicate of [How To Replace Some Characters With Asterisks](https://stackoverflow.com/questions/11272581/how-to-replace-some-characters-with-asterisks) — Thamilhan, May 26 '17 at 11:49
Related: https://stackoverflow.com/questions/43762251/hint-or-partially-hide-email-address-with-stars-in-php — Jesse Nickles, Aug 01 '22 at 08:25
Related: https://stackoverflow.com/questions/20545301/partially-hide-email-address-in-php — Jesse Nickles, Aug 01 '22 at 08:26

score 14 · Accepted Answer · answered Nov 18 '18 at 22:58

If you wanna mask middle part:

private function stringToSecret(string $string = NULL)
{
    if (!$string) {
        return NULL;
    }
    $length = strlen($string);
    $visibleCount = (int) round($length / 4);
    $hiddenCount = $length - ($visibleCount * 2);
    return substr($string, 0, $visibleCount) . str_repeat('*', $hiddenCount) . substr($string, ($visibleCount * -1), $visibleCount);
}

Result:

1 => 1
12 => 12
123 => 1*3
1234 => 1**4
12345 => 1***5
123456 => 12**56
1234567 => 12***67
12345678 => 12****78
...

It's better to use multi-byte safe functions. – Murat Oct 20 '22 at 18:12 — Murat, Oct 20 '22 at 18:12

score 7 · Answer 2 · answered Jun 23 '21 at 05:39

7

If phonenumber length is more than 4, then you can do this:

substr_replace($number, str_repeat('*', strlen($number)-4), 0, -4);

If you want to also show the first digit:

substr_replace($number, str_repeat('*', strlen($number)-5), 1, -4);

answered Jun 23 '21 at 05:39

Lee KM

106
1
4

score 3 · Answer 3 · answered May 26 '17 at 11:50

3

Try this

$phone_number = '******' . substr( $phone_number, - 4);
echo $phone_number;

answered May 26 '17 at 11:50

sandip kakade

1,346
5
23
49

This answer is missing its educational explanation. – mickmackusa Jul 05 '21 at 09:50

score -3 · Answer 4 · answered May 26 '17 at 11:51

-3

you can use substr :

 $my_text = '12345678';

echo substr($my_text, 1);  // 2345678

answered May 26 '17 at 11:51

moathdev

246
2
9

This doesn't mask anything, it truncates. – Hashim Aziz Feb 19 '22 at 18:46

score -3 · Answer 5 · answered May 26 '17 at 11:53

-3

*******echo substr("9876543210", 6, 4);

answered May 26 '17 at 11:53

Sagar Jajoriya

2,377
1
9
17

How to mask parts of a string with the asterisk character

5 Answers5

Linked

Related