Extract US phone numbers from a string

Question

I am trying to extract US only phone numbers from a string.

I have looked around the web/SO but have not found any suitable solution for my needs.

To be honest, I have 2.5 years of experience in Web Programming but I suck at RegEX.

Here is only RegEX I wrote (\d{3}+\-\d{3}+\-\d{4}+)

but it only detects 589-845-2889

Here are phone numbers I want to extract.

589-845-2889

(589)-845-2889

589.845.2889

589 845 2889

5898452889

(589) 845 2889

Please tell me how can I achieve this feat in single Regex for PHP.

EDIT:

If you feel any other format of US number a user can enter, also mention that as well, and include that in RegEX as well.

P.S:

Actually I am trying to scrape Craiglist and user may have posted their phone number in any possible format.

Answer 1

In PHP (PCRE) you can use this regex based on conditional subpatterns:

(\()?\d{3}(?(1)\))[-.\h]?\d{3}[-.\h]?\d{4}

RegEx Demo

• (\()? matches optional ( and captures it in group #1
• (?(1)\)) is conditional pattern that matches closing ) only if group #1 is not null i.e. ( is present on left of the match.

Answer 2

Finally, it works:

^(\((\d{3})\)|(\d{3}))[\s\-\.]?\d{3}[\s\-\.]?\d{4}

tested in notepad++