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

Similar to Tom Haigh’s answer, you could also get the difference of the arguments you expect and those you actually get:

$argKeys = array_keys($_GET);
$additionalArgKeys = array_diff($argKeys, array('var'));
var_dump($additionalArgKeys);