Regex to validate the string in a particular format in powershell

Question

I have the regex ^[A-Za-z]{2}[A-Za-z0-9]{9}$ to validate the format of a string AB987654321

if (!( $address -match "^[A-Za-z]{2}[A-Za-z0-9]{9}$"))

    {
     write-host $address
    }

I would like to modify this regex so that I would be able to validate smtp:[email protected]

So the string should start with smtp: or SMTP:
Then the above format '^[A-Za-z]{2}[A-Za-z0-9]{9}$'
anything after @

Could someone please help?

Then what about ^smtp:[a-z]{2}[a-z0-9]{9}@.+ if you don't care about the domain part. -match is case insensitive, so you don't need [a-zA-Z] — Theo
– Theo, Commented Jul 22, 2020 at 18:50
Why do you need help with this, you've explained all the pieces, just put them together. What have you tried ? — user13843220
– user13843220, Commented Jul 22, 2020 at 21:02

Ryszard Czech · Accepted Answer · 2020-07-22 19:59:02Z

Match your new string format using

$string -match '^smtp:[A-Z]{2}[A-Z0-9]{9}@'

See proof. As Theo commented, you do not need [A-Za-z], [A-Z] will suffice. Note the -match does not require the pattern to match the entire string, so you need nothing after @.

EXPLANATION:

NODE                     EXPLANATION
--------------------------------------------------------------------------------
  ^                        the beginning of the string
--------------------------------------------------------------------------------
  smtp:                    'smtp:'
--------------------------------------------------------------------------------
  [A-Z]{2}                 any character of: 'A' to 'Z' (2 times)
--------------------------------------------------------------------------------
  [A-Z0-9]{9}              any character of: 'A' to 'Z', '0' to '9'
                           (9 times)
--------------------------------------------------------------------------------
  @                        '@'

Sven.hig · Accepted Answer · 2020-07-22 20:03:29Z

1

Try this patter

^smtp\:[a-z]{2}[a-z0-9]{9}[@]\w+[.]\w+

Regex Demo

edited Jul 22, 2020 at 20:03

answered Jul 22, 2020 at 19:58

Sven.hig

4,5292 gold badges10 silver badges18 bronze badges

1 Comment

Sven.hig Over a year ago

@AdminOfThings thanks for the feedback i have made some changes to make it less verbose let me know if there should be anymore changes or feel free to edit the answer thanks

Collectives™ on Stack Overflow

Regex to validate the string in a particular format in powershell

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related