I'm using a regular expression for a phone number. It allows at least 10 digits including special characters like +()-

+1(33)-489256

The Regular expression I am using is:

^\D*(?:\d\D*){10,}$

It works OK but it should not allow other special characters in the phone number like #@$%

Please let me know how I can update my regex.

I'm using a regular expression for a phone number. It allows at least 10 digits including special characters like +()-

+1(33)-489256

The Regular expression I am using is:

^\D*(?:\d\D*){10,}$

It works OK but it should not allow other special characters in the phone number like #@$%

Please let me know how I can update my regex.

• javascript
• c#
• regex

Share Follow edited Oct 19, 2015 at 6:29 Mariano 6,52144 gold badges3333 silver badges4848 bronze badges asked Oct 19, 2015 at 6:04 theITvideostheITvideos 1,50222 gold badges1919 silver badges2929 bronze badges 1

• Can you add all possible valid formats of the phone numbers – Tushar Commented Oct 19, 2015 at 6:58

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2 Answers 2

Sorted by: Reset to default 3

^\D*(?:\d\D*){10,}$
         ^^
       [+()-]

just point out your regex problem

\D: any characters except digits

The problem in your regex is \D*, this will match any non-digit characters(including special characters) any number of times.

Use

/^(\+\d{1,4})?(\d{2}\)-\d{6}$/

Regex Demo and Explanation

1. /: Delimiters of regex literal
2. ^: Starts with anchor
3. \+\d{1,3}: One to three digits after +
4. \d: Matches single digit
5. \(: Matches ( literally
6. \d{2}: Matches exactly two digits
7. \): Matches ) literally
8. -: Matches - literally
9. \d{6}: Matches exactly six digits
10. $: Ends with anchor

Live Demo

input:valid {
  color: green;
}
input:invalid {
  color: red;
}

<input type="text" pattern="(\+\d{1,4})?\(\d{2}\)-\d{6}" />