QUERY_STRING question

[ixsis]

How do I check to see if a QUERY_STRING exists? I want to stop a page and redirect if a user navigates straight to the page without the required parameters.

In ASP this was easy but I am just spinning my wheels in PHP for what should be a simple theng...

Any suggestions?

Thanks

[rIkLuNd]

<?php

if($QUERY_STRING == "id=1&page=action")
{
   echo "Welcome";
}
else
{
   header("Location: wrong.php");
}

?>

[ixsis]

However that code will generate an error if there is no query string at all.

I think I have gotten something that works. Here is what I am doing right now:

<? 
if (empty($_SERVER['argv']))
{
       header('Location: [url]http://www.someplace.com[/url]');
} else {
       echo "We have data";
}
?>