basic php problem.

This is not my code but I can give it a try. I don't even know why he uses this-> so much. My understanding is that php  under apache uses a multiprocess paradigm, not multithreading, thus a variable used by one  user shouldn't bleed to another user. Right?

I tried using $image_filename = $row->url_field; but it did not work. 

proof that an old dog can learn new tricks