Inserting PHP code into a echo statement

I apologize if this is the wrong section to post this in but I have an issue – all I want to do is have this statement work by inserting the “<?php bloginfo(‘template_url’); ?>'” into this example. This doesn’t work for me.

echo <img src=”‘.<?php bloginfo(‘template_url’); ?>.'”/images/subdirectory/whatevergraphic.gif” border=”0″>

I’m getting a syntax error. I’ve looked up simple combining php code etc and nothing is working for me.

Am I not doing the php right? Any help would be great please!