I'm trying to include file from another php framework but doing so it's giving me an error failing open the stream for the files which are included inside the file I'm trying to include.
Any idea on how to include it properly so that the files included inside my included file are able to be processed?
Your include only looks only one directory up.
include ("../../other/index.php");
would be two directories up so into the "admin" directory then the "other" directory
This has been asked before here
What Framework are you using?
I have little experience with templates but I don't think you should be adding PHP code to a template file.
Click Here for another question on how to add PHP code to a template file.
However as far as your path goes, try using:
include("../../other/index.php");