Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

regular expressions - phone number and extension

Posted on 2009-04-09
4
Medium Priority
?
1,072 Views
Last Modified: 2012-05-06
We are trying to use regular expressions to check a valid phone number.  We have a pattern but we want to add an option for an extension.
phonePattern = @"\((?<AreaCode>\d{3}) \)?[-\s]? (?<Prefix>\d{3}) [-.] (?<Number>\d{4})";
would this work
phonePattern = @"\((?<AreaCode>\d{3}) \)?[-\s]? (?<Prefix>\d{3}) [-.] (?<Number>\d{4}) x?<ext>\d{10}";
Here are some valid examples for phone numbers
555-123-4567
555-123-4567 x1234
555-123-4567 x 1234
555-123-4567 x778942
0
Comment
Question by:tampsystems
  • 2
4 Comments
 

Expert Comment

by:tosanjay
ID: 24108489
ok. So, valid examples are:
555-123-4567
555-123-4567 x1234
555-123-4567 x 1234
555-123-4567 x778942
e.g. <3 digits><-><3 digits><-><4 digits>#extension Part#<space><x><optional space><4 to 6 digits>

let me put regexp in a simpler form.
\d{3}\-\d{3}\-\d{4}(\sx\s?\d{4,6})?

this will match all the number formats, mentioned above. A better solution can be made if you know the next character after a number e.g. new line/carriage return.
Hope this helps.
0
 

Author Comment

by:tampsystems
ID: 24116526
I want to be able to support () spaces and dashes
i.e.
(555) 123 4567
(555) 123-4567
555 123 4567
555 123-4567
555-123-4567
5551234567
555 1234567
555123 4567
And the optional extension number
0
 
LVL 13

Expert Comment

by:numberkruncher
ID: 24119510
The following regular expression matches your formats, and the following:

(123) 123-4567 1234
(123) 1234567 1234
(123) 123-4567
(123) 1234567
123-4567 1234
1234567 1234
123-4567
1234567

((\d{3}|\(\d{3}\))?(\s|\-)?\d{3}(\s|\-)?\d{4})((\s|\-)?\d{4})?

Open in new window

0
 
LVL 13

Accepted Solution

by:
numberkruncher earned 2000 total points
ID: 24119551
Sorry, I just noticed that you wanted an "x" on your extension number.

The below regex matches:

(123) 123-4567 x1234
(123) 1234567 x1234
123-4567 x1234
1234567 x1234

(123) 123-4567 x 1234
(123) 1234567 x 1234
123-4567 x 1234
1234567 x 1234

(123) 123-4567x 1234
(123) 1234567x 1234
123-4567x 1234
1234567x 1234

(123) 123-4567x1234567890
(123) 1234567x1234567890
123-4567x1234567890
1234567x1234567890

((\d{3}|\(\d{3}\))?(\s|\-)?\d{3}(\s|\-)?\d{4})(\s?x(\s)?\d{1,10})?

Open in new window

0

Featured Post

Important Lessons on Recovering from Petya

In their most recent webinar, Skyport Systems explores ways to isolate and protect critical databases to keep the core of your company safe from harm.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I have been reconstructing a PHP-based application that has grown into a full blown interface system over the last ten years by a developer that has now gone into business for himself building websites. I am not incredibly fond of writing PHP code o…
We are witnesses that everyone is saying that our children shouldn't "play" with a technology because it is dangerous. This article is going to prove that they are wrong.
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
Suggested Courses

810 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question