Splunk Search

What Is Purpose Of Leading P Argument In Field Extraction Regex?


When extracting a field using a regex, what does the P argument do (the P character between the question mark and the field name)? I have seen examples with and without this argument, but I don't see any obvious difference in the results. For example:
(?i) Finished (?P.+)
(?i) Finished (?.+)

I looked in the Splunk manual and on the Answers site but couldn't find any description of this argument. Apologies if I'm missing something obvious.

Tags (1)
0 Karma


The P was part of the syntax when Python first introduced the idea of naming a capture in regular expressions. However, the P is not part of the syntax in some other flavors of regular expressions, most notably Microsoft .NET.

Splunk supports the syntax both ways.


Great - thanks for the quick response!

0 Karma
Get Updates on the Splunk Community!

Accelerate Service Onboarding, Decomposition, Troubleshooting - and more with ITSI’s ...

Accelerate Service Onboarding, Decomposition, Troubleshooting - and more! Faster Time to ValueManaging and ...

New Release | Splunk Enterprise 9.3

Admins and Analyst can benefit from:  Seamlessly route data to your local file system to save on storage ...

2024 Splunk Career Impact Survey | Earn a $20 gift card for participating!

Hear ye, hear ye! The time has come again for Splunk's annual Career Impact Survey!  We need your help by ...