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I have similar requirements to those mentioned in this question: compare two phone numbers

I want to compare phone numbers which are in different formats. For example, +467856753421 = 07856753421 = 7856753421.

Is it possible to do it without using the google library recommended in the linked question?

Tim
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user13656520
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  • Is there a reason you want to avoid using the library recommended on the other question? Also, you've tagged this as regex - is there a reason that you want a regex solution? – Tim Jul 21 '20 at 10:18

2 Answers2

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You could try to write a method that sanitises the input string to a standard format, and compare them, but phone numbers have so many different formats that something is bound to slip through the gaps, this is an area where I would strongly recommend a well-tested library that someone else has spent all that time writing for you.

Luke Storry
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Try this regex:

(^[+]\d{2}|^0*|^00\d\d)(\d*)

The first capture group is your prefix. The second is your number. (This might need some adjustment if you have US prefixes which are +1 and 001.)

Tim
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tomanizer
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