user-defined function in Perl or Tcl ???

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/13/functions-matching.html
Description:

https://www.postgresql.org/docs/current/functions-matching.html

> If you have pattern matching needs that go beyond this, consider writing a
user-defined function in Perl or Tcl.

If you start from scratch today, it is unlikely that you use Perl or Tcl.

I think this message on above page needs an update.