I want to use a global tag in a post, so the result of the global shows when the post is read.

Preferably, I want to put it in when the post is created, but if necessary, another programme (maybe php) can put the global into the post field of the database, but then when the post is made available for reading, the global-generated information should be available.

Any ideas how to do this?

Thanks!!

I do not wand to put the global in the template (I know how to do that).

I want to put the global in the post field of the database.

Any ideas anyone?