passing variables between pages without using url??

hi php'ers! just a quick question please, it would help me out a lot. i've written a form, which passes value to a ph script to insert them into mysql. from there on, i forward onto another page, but using : header("Location: http://www.foo.com/foo2.php?id=4&user=foo"); now i really don't want to have the url on the next page looking like that because people might change the values, refresh the page and mess up my database. so is there any other ways i can pass values on?? thanks!! sunny __________________________________________________ Do You Yahoo!? Find a job, post your resume. http://careers.yahoo.com