UBB.threads PHP Forum Software Community Forums UBB.threads 7 Version 7 Support How to put AdSense inside the Signature field?

I would like to include the AdSense code inside the signature on forum version 7.
I did it, but the code didn't resolve instead is shows the whole google code there on the signature field.

Is there any way to force the signature field to be read as a PHP code?
I'm using iFrame format, from OpenX ad delivery system.
Thank you