regex match 2 characters / and -

Question

I have a regex that looks like this:

/(((\+|00)32[ ]?(?:\(0\)[ ]?)?)|0){1}(4(60|[789]\d)\/?(\s?\d{2}\.?){2}(\s?\d{2})|(\d\/?\s?\d{3}|\d{2}\/?\s?\d{2})(\.?\s?\d{2}){2})/g

this matches: +32 16/894477 but +32 16-894477 doesn't

this 20150211-0001731015-1 also matches but this shouldn't match

I am trying to fix my regex here:

https://regex101.com/r/LmaIPA/1

The hyphen is not matched, and you can add a whitspace boundary to the right https://regex101.com/r/8ZSpfD/1 at first glance. Do you need all those separate capture groups? — The fourth bird, Oct 06 '21 at 09:50
Or a `(?!-?\d)` lookahead, [demo](https://regex101.com/r/8ZSpfD/2). — Wiktor Stribiżew, Oct 06 '21 at 09:52
@Thefourthbird when i use your regex in my PHP 7.4 code i get an `Unknown modifier '-' in` any idea why? — Miklo Vuba, Oct 06 '21 at 09:58
@MikloVuba See https://stackoverflow.com/questions/20705399/warning-preg-replace-unknown-modifier and https://stackoverflow.com/questions/5589807/preg-match-unknown-modifier Did you use delimiters? — The fourth bird, Oct 06 '21 at 09:58
@Thefourthbird no i did not I copy pasted it from regex site — Miklo Vuba, Oct 06 '21 at 10:02
You can see generated demo code here https://regex101.com/r/2SoMHJ/1/codegen?language=php — The fourth bird, Oct 06 '21 at 10:03

score 0 · Answer 1 · answered Oct 06 '21 at 09:53

0

 (((\+|00)32[ ]?(?:\(0\)[ ]?)?)|0){1}(4(60|[789]\d)\/?(\s?\d{2}\.?){2}(\s?\d{2})|(\d\/?\s?\d{3}|\d{2}(\/?|\-)\s?\d{2})(\.?\s?\d{2}){2})

I guess I fixed part of it by adding this but let me know if there something else that doesn't work properly :)

answered Oct 06 '21 at 09:53

botana_dev

418
4
16

score 0 · Answer 2 · answered Oct 06 '21 at 10:25

There are a lot of capture groups, and some can also be omitted if you don't need them for after processing.

The issue is that for +32 16-894477 you are not matching the hyphen, and you match the larger string as there are no boundaries set so you get a partial match.

Some notes:

You don't have to escape the / when using a different delimiter
You can omit {1} from the pattern
\s can also match a newline, you can use \h if you want to match a horizontal whitespace char
A single space [ ] does not have to be in a character class

You can extend the pattern with adding the hyphen and forward slash to a character class using [/-]?, wrap the whole pattern in a non capture group and assert a whitspace boundary to the right (?:whole pattern here)(?!\S)

A version without the capture groups for a match only:

(?:(?:(?:\+|00)32\h?(?:\(0\)\h?)?|0)(?:4(?:60|[789]\d)/?(?:\h?\d{2}\.?){2}\h?\d{2}|(?:\d/?\h?\d{3}|\d{2}[/-]?\h?\d{2})(?:\.?\h?\d{2}){2}))(?!\S)

Regex demo | Php demo

Php example

$re = '~(?:(?:(?:\+|00)32\h?(?:\(0\)\h?)?|0)(?:4(?:60|[789]\d)/?(?:\h?\d{2}\.?){2}\h?\d{2}|(?:\d/?\h?\d{3}|\d{2}[/-]?\h?\d{2})(?:\.?\h?\d{2}){2}))(?!\S)~';
$str = 'OK 01/07 - 31/07  
OK 0487207339
OK +32487207339
OK 01.07.2016
OK +32 (0)16 89 44 77
OK 016894477
OK 003216894477
OK +3216894477
OK 016/89.44.77
OK +32 16894477
OK 0032 16894477
OK +32 16/894477
NOK +32 16-894477 (this should match)
OK 0479/878810
NOK 20150211-0001731015-1 (this shouldn\'t match)';

preg_match_all($re, $str, $matches);

print_r($matches[0]);

Output

Array
(
    [0] => 0487207339
    [1] => +32487207339
    [2] => +32 (0)16 89 44 77
    [3] => 016894477
    [4] => 003216894477
    [5] => +3216894477
    [6] => 016/89.44.77
    [7] => +32 16894477
    [8] => 0032 16894477
    [9] => +32 16/894477
    [10] => +32 16-894477
    [11] => 0479/878810
)

regex match 2 characters / and -

2 Answers2