Does anyone have experience with creating the regex rule for a fail2ban filter?

I am trying to create a filter for AH01264 errors. This is for bots trying to run standard "php"s or "pl"s off of my home server.

While I have figured out how enter and activate new filters in fail2ban, the regex required is way beyond my capabilities.

So was hoping someone here has done this before and could help me out.

Thank you