Regex to allow only digits, hypens, space, parentheses and should end with a digit (javascript) [duplicate]

Possible Duplicate:
US Phone Number Verification

I need to validate US phone number. It could be in the format:

xxx-xxx-xxxx
(xxx) xxx xxxx
(xxx)-xxx-xxxx
xxxxxxxxxx

but it should not be

xxx-xxx-xxxx-
-xxx-xxx-xxxx

It should accept digits, hyphens, space and parentheses.

Currently I use

^\[0-9 \-\. ]+$

which does not validate dash at the beginning or end.

staafl

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

Eugene

Well my idea is (after some searching) not new at all! Look at this:

This is an Excellent suggestion btw.

This one is probably correct (assuming some parsing errors depending on the regex engine you are using. It's also ugly as hell :(.

(?:\d{3}(?:\d{7}|\-\d{3}\-\d{4}))|(?:\(\d{3}\)(?:\-\d{3}\-)|(?: \d{3} )\d{4})

(^\(?[0-9]{3}\)?\-?\s?[0-9]{3}\-?\s?[0-9]{4}[^-])

I tested this on http://regexhero.net/tester/ and got it to select the following patterns:

xxx-xxx-xxxx 
(xxx) xxx xxxx 
(xxx)-xxx-xxxx
xxxxxxxxxx

It ignored the following patterns:

xxx-xxx-xxxx- 
-xxx-xxx-xxxx

I hope this helps, or at least moves you in the correct direction.

This should do the trick:

/^([\d]{6}|((\([\d]{3}\)|[\d]{3})( [\d]{3} |-[\d]{3}-)))[\d]{4}$/

It starts by checking if the first 6 digits are xxxxxx,
if not it looks if the first three digits are (xxx) or just xxx
- and if one of those it checks if the next three are xxx or -xxx-
At the end it checks that there are four trailing digits xxxx

来源：https://stackoverflow.com/questions/12101125/regex-to-allow-only-digits-hypens-space-parentheses-and-should-end-with-a-dig

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