PHP File Integration with SPIRIT

I would like to do something similar to proceed with integrating my php code
https://premium.wpmudev.org/blog/get-creative-include-any-file-or-php-anywhere-on-your-wordpress-site/

I tried to follow the example but amberpanther plugin is not available. I integrated include me plugin but I don't see any results. Please help me finding a plugin which can include the php file into the page of spirit.

My next natural question would be:
The php code I am using has a text file and xml metadata file.
After adding the php file, I would like to call its function to echo certain part of data from text file and its xml file. Your guidelines will be very valuable :slight_smile: