Google-analytics – Create a regex for Google Analytics, to tack a specific US phone number that can be in multiple formats

google analyticsregex

I want to write a regular expression to tack a number in Google Analytics for a specific US phone number that supports the following formats: ###-###-#### (###) ###-#### ### ### #### ###.###.#### where # means a specific number.

I need it written so that I can track a different phone number in the future by just swapping out the digits as needed.

So far I came up with this to validate a phone number that is in the different formats I'm looking for, but I'm having trouble understanding how to change it in order to validate a specific phone number, not just a general one. How would I track the phone (630) 321-4321 specifically for example?

This is how far I got:

^\+?\d{0,3}\s?\(?\d{3}\)?[-.\s]?\d{3}[-.\s]?\d{4}$

Like I mentioned above, this will validate a general phone number but I need a specific number, not a general one.

Best Answer

I'd say:

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

Explaination:

  • ^: String start
  • \(?\d{3}\)?: That would match 3 numbers, with or without (). In this case the parentheses have a special meaning in regexp, so you have to escape them. Parentheses may or may not be in the expression, so that's why I placed the ? just after.
  • [. -]: One of these characters follow. Although the point has a special meaning in regexp, in defined in a set you don't have to escape it.
  • \d{3}: Just another 3 digits.
  • [. -]: Another separator. Either a ., or a -, or a space.
  • \d{4}: Just another 4 digits.
  • $: String end.
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