Defining a variable

[paulyy]

How do I create a variable that will detect the page and show a certain image?

I'm not a PHP person at all, so please reply in dummy language I figured in theory it would be something like;

PHP Code:

$pageimg = 
   IF page=gallery.php SHOW <img src="images/misc/gallery.gif" /> 
     OR
   IF page=cars.php SHOW <img src="images/misc/car.gif" /> 


I plan on adding this to my phpinclude_start. Any help is appreciated!