Adsense Revenue sharing

[Habboubih]

hello folks,

I am trying to implement a Adsense Revenue sharing system.

here what I've done and what I need

1. I created a custom user field so the user can add his Adsense ID
what is the preg_match so the user should enter the correct format of the Adsense ID.


2. Now I should create a new AD inside the first post (suppose the adsense field name is: field22)

if the user entered his adsense id, it should show his adsense ad inside his thread.

if the user did not enter any adsense id (field22 is empty) it should show my adsense id.

what is the code ?