Check query string (PHP)

Question

I use a query string, for example test.php?var=1.

How can I check if a user types anything after that, like another string...

I try to redirect

Answer 1

I think you are trying to get rid of unwanted parameters. This is usually done for security reasons.

There won't be a problem, however, if you preinitalize every variable you use and only use variables with $_GET['var'], $_POST['var'] or $_REQUEST['var'].