Profile: nelsonT-2

Problem: I would like to create a View that filters child posts (CPT A) by the taxonomy terms applied to their parent posts (CPT B).

Solution: It is not possible to filter a View of CPT A by taxonomy terms applied to CPT B using the standard View editor. You can use the Post Relationship API to modify the View's query using PHP.

Relevant Documentation:
https://toolset.com/documentation/customizing-sites-using-php/post-relationships-api/

Problem:

The issue here is that the user wanted to know if it was possible to add php functions directly to our Views editor.

Solution:
Unfortunately it's not possible to add raw php to your view editor. What you need to do is to wrap this php code in a shortcode and then use the shortcode in our views plugin.