Are there static analyzers that detect the presence of code pattern repetitions?

Question

Analytics

Interested in code analyzers written in C#, PHP. But, I think that in the comments you can write about tools for other languages, because. and other people might be interested.
The legs of the problem grow from where? I want to write an extension method, but I don’t know how to find repeated places in the code later (a simple search will not be able to identify them) in order to replace them with a method call.
Thank you.

Answer 1

Copy/Paste Detector (CPD) for PHP code

Answer 2

There are many analyzers, the question is whether you are ready to pay money for them.
Alternatively, download the demo. Here is a good article with info on the case.