Regex to validate phone number pattern

Question

How can I construct regx to validate phone number? That is:

First digit must be 04 or 050 , length range between 8-13
First digit cannot be 43 or 44 , first digit must be 4 or 9 and length should be 8 digits

I have tried this pattern:

^[04,050]\\d{8,13}

Can any body help me?

possible duplicate of A comprehensive regex for phone number validation — Toto
– Toto, Commented Jun 27, 2013 at 11:56

Tim Pietzcker · Accepted Answer · 2013-06-27 11:52:25Z

3

Let's break it down (hoping I understand correctly):

^               # Start of string
(?:             # Match one of the following:
 04\d{6,11}     # Either an 8-13 digit number starting with 04
|               # or
 050\d{5,10}    # an 8-13 digit number starting with 050
|               # or
 4[0-25-9]\d{6} # an 8 digit number starting with 4 but not 43 or 44
|               # or
 9\d{7}         # an 8 digit number starting with 9
)               # End of alternation
$               # End of string

edited Jun 27, 2013 at 11:52

answered Jun 27, 2013 at 10:19

Tim Pietzcker

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7 Comments

Bohemian Over a year ago

I noticed you did thus before and I let it slide, but this time I'm going to pull you up: (?: does not mean "either", although saying so helps make your comments into a sentence, this fact carries no technical weight and may be misleading to novices.

Tim Pietzcker Over a year ago

@Bohemian: I'm aware of the potential for misunderstanding. I just don't know what to write instead that's both correct and understandable. How do you like the new version?

Bohemian Over a year ago

I respect your regex skills greatly, however the comments are just wrong. For starters, you are starting a group to allow an OR, that's what the bracket does, then you (unnecessarily) make it non-capturing with ?:, presumably for "performance" reasons (optimising early?), then you introduce some or'ed terms. I would comment it basically like that

Sachin Over a year ago

Hi Tim Pietzcker , thanks. It worked for me :) This is what I expect .... ^(?:04\\d{6,11}|050\\d{5,10}) and ^(?:4[0-25-9]\\d{6}|9\\d{7}) . Thank you once again !!

Bohemian Over a year ago

I would have just said (?: # start of (non capturing) group. Now, a serious comment - why have the group at all? Isn't it not needed? Won't the OR work anyway because it's "bracketed" by start/end of input?

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