Comments on: Windows PowerShell: Extracting Strings Using Regular Expressions

By: srdjan

srdjan — Thu, 20 Dec 2012 12:36:44 +0000

Thanks man, very handy tool

By: Andrew Zammit Tabona

Andrew Zammit Tabona — Sat, 17 Nov 2012 19:03:50 +0000

Hi Bart,

Thanks for your feedback – glad you found this useful.

To search for two strings in one line of text you will need to combine two regular expressions – in your case, one for the IP addresses and one for the date.

You can combine the two regular expressions into one by using the pipe operator (|), as shown in the sample code below:

$input_path = ‘c:\ps\ip_addresses.txt’
$output_file = ‘c:\ps\extracted_ip_addresses.txt’
$regex = ‘\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b|\b\d{1,2}\/\d{1,2}\/\d{4}\b’
select-string -Path $input_path -Pattern $regex -AllMatches | % { $_.Matches } | % { $_.Value } > $output_file

Note: In this example I am using a regular expression to match dates in the XX/XX/YYYY format. This can be changed as necessary depending on your requirements.

Hope this helps!

By: Bart

Bart — Mon, 12 Nov 2012 11:03:12 +0000

But working on this further poped up another question:
I have now my IP’s that I was searching.
But in that same text line in the logging file there is also the date.
Can you search on two strings in one line of text?

By: Bart

Bart — Thu, 08 Nov 2012 12:26:54 +0000

Thx !
With your push in the correct direction I got what I needed!