How does php hide the real address of an image?

& Lt ;? $ Image_pathimages $ image_file $ image_path. $ _ GET [name]; $ sTmpVarfread (fopen ($ image_file, r), filesize ($ image_path); header (Content-type: image *); echo $ sTmpVar ;? & Gt; this code does not $ Image_path = "images /"
$ Image_file = $ image_path. $ _ GET ['name'];
$ STmpVar = fread (fopen ($ image_file, 'r'), filesize ($ image_path ));
Header ("Content-type: image /*");
Echo $ sTmpVar;
?>

This code can not only hide images, but also hide the actual FLASH address without modifying the last three lines of the code.
Using this together with other technologies can prevent leeching.