Conditional Regex statements

Question

I'm trying to create a Regex that validates a phone number to make sure it starts from 0700 - 0792. I initially had a Rex to validate from 0700 - 0789 which was:

/^07[0-8][0-9]/

And now I dont know how to modify it to have it in such a way that if the 3rd digit is 9 then it should only allow the 4th digit to be only 0,1 or 2.

Thank you

Avinash Raj · Accepted Answer · 2015-09-15 09:14:03Z

1

Change your regex to,

/^07(?:[0-8][0-9]|9[012])/

answered Sep 15, 2015 at 9:14

Avinash Raj

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vks · Accepted Answer · 2015-09-15 09:14:01Z

1

^07(?:[0-8][0-9]|9[0-2])$

You can or the extra 3 numbers.See demo.

https://regex101.com/r/vV1wW6/14

answered Sep 15, 2015 at 9:14

vks

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