CODEWITHSUNDEEP
powershellif-statementmatchconditional-statementsstatements
TheInfamousOne
TheInfamousOne

Reputation: 205

If Statement -match or -contains not returning correct condition

We are updating our SIP for email addresses and we are going to use a PowerShell script to monitor when AD is updated and then update the local machine.

I'm to the part where I split the email address at the @ symbol and I'm looking to the left of the @ symbol.

Example:

[email protected]

I can split it correctly where I just get

FirstName.LastName

but when I go to check the condition if it contains a ., I can't get a correct true of false.

Example:

$sipaddress = "[email protected]"
$splitname = $sipaddress.Split("@")[0]

# at this point, $splitname varible will contain "FirstName.LastName"

if ($splitname -match '.') {
  Write-Host "TRUE"
} else {
  Write-Host "False"
}

# this returns TRUE which is perfect

BUT, if I change the variable to like this for testing

$sipaddress = "[email protected]"

the $splitname variable will contain FirstNameLastName, and it still returns TRUE when that is not correct. It should return false because there is no ..

What am I doing wrong? I tried to use -contains in the if statement but that does not work either.

Is there a way to try and check for a -match for the .?

Upvotes: 0

Views: 3181

Answers (1)

Ansgar Wiechers
Ansgar Wiechers

Reputation: 200503

The -match operator does a regular expression match, so matching . will match any character except newlines, not just dots. If you want to match a literal dot you need to escape it (\.) or do a different kind of comparison, for instance a wildcard match with the -like operator (-like '*.*') or by using the Contains() method of the string object.

The -contains operator checks if an array contains a particular element. To be able to use that operator you'd need to convert your string to a character array:

[char[]]$splitname -contains '.'

I wouldn't recommend doing this, though. The other methods are more convenient.

Modified code:

$sipaddress = "[email protected]"

$localpart, $domain = $sipaddress -split '@'

if ($localpart.Contains('.')) {
  Write-Host 'True'
} else {
  Write-Host 'False'
}

Upvotes: 3

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