How to match numbers that contain at least 7 different digits?

Question

I need a regex pattern that matches any number that it's non-repeated digits are more than 7 digits. for example it has to match:

1234567
122345678

But not to match:

non-repeating digits in this number for example 122345678 is 8 while the whole number has 9. but the non-repeating digits in this number: 11111222345 is only 5. this pattern doesn't do it:

/[0-9]{7,}/

I want it to count the non-repeating digits, not to ignore any number that has repeating digits.

Is `12134567` valid? If so, try eg: [`count(array_unique(str_split($d))) >= 7`](https://3v4l.org/MRYWQ) — bobble bubble, May 25 '19 at 11:22
@bobblebubble thank you, it does it but I need to perform this in a string that has texts in it, meaning I want to use the pattern to extract those numbers from a mixed string. — Mohammad Amin Ghaseminia, May 25 '19 at 11:25
@MohammadAminGhaseminia How about using `preg_match_all()` with `\b\d{7,}\b` to extract all digits and do the other check. — bobble bubble, May 25 '19 at 11:31
Please don't change your question after others have already answered. — Tim Biegeleisen, May 25 '19 at 11:34
I understood the question as you want to match numbers composed of at least 7 unique digits eg: `712111345446` is valid or even `49833376543`. Correct me, if I'm wrong. If I'm right, the word "repeating" can lead to confusion :p — bobble bubble, May 25 '19 at 11:37
@bobblebubble it's correct, tell me what word I have to use then? — Mohammad Amin Ghaseminia, May 25 '19 at 11:41
@TimBiegeleisen: The question is not very clear but this is not a dup. They want to match numbers that contain at least 7 different digits, so `1122334455667788` is valid even if it contains duplicates. — Toto, May 25 '19 at 12:26

bobble bubble · Accepted Answer · 2019-05-25T12:11:47.767

1

How I understand your question is, that you want to extract numbers composed of at least 7 different digits. Would use preg_match_all() to get the numbers in combination with a simple non-regex check:

if(preg_match_all('~\d{7,}~', $str, $out) > 0)
{
  $res = array_filter($out[0], function($v) {
    return count(array_unique(str_split($v))) >= 7;
  });
}

See this demo at 3v4l.org

The word "repeating" surely lead to confusion. Also "more than 7 digits" which would be at least 8.

edited May 25 '19 at 12:11

answered May 25 '19 at 11:56

bobble bubble

16,888
3
27
46

array_unique removes duplicates and keep 1 element. Try with `$str = '122334455667789';` it should be invalid because there is only 3 non duplicate (i.e. 1, 8, 9) but your code gives valid with 9 unique – Toto May 25 '19 at 12:03
@Toto I think OP wants the unique digits of number to be at least 7. So in your example `122334455667789` there is 9 different digits which is more than 7. – bobble bubble May 25 '19 at 12:13
1

My previous comment has been deleted. I said: you're probably right – Toto May 25 '19 at 14:26

How to match numbers that contain at least 7 different digits?

1 Answers1