How to put in a Google AddSense in my php site

Hi there

I am struggling to get Google AdSense to work on my site
I have made an add place with a solid background color in Google AddSense and put in the HTML code on the page right under the text “Reklameplads 1”. But nothing shows on the page.

I have also been on a couple of pages that gives information on how to include Google AddSense on a php page, but the AddSense code the show does not match the code I get at all. This is one of those:

What am I going wrong, and f anybody have ideas here, I would be very grateful.