[RESOLVED] Check if _GET variable exists

[dtm32236]

Hi,

So I have a page with url:
mysite.com/product.php?model=JUCA3821

This would bring up my JUCA3821 product.

I'd like to make it so that if a user deleted the model part (mysite.com/product.php) it would redirect to an error page or something similar.

So I wrote this code:

// if model is empty, the url is incorrect
if (!isset($_GET["model"]) || empty($_GET["model"])) {
    header('Location: /product-error.php');
} else {
    $modelNo = $_GET["model"];
}

$tsql = "SELECT fProductRefNum1, ..., fUnitDimension2
         FROM fProducts
         WHERE fProductRefNum1 = '$modelNo'"; 

But this isn't working. I can't seem to make it so that this will work. I get this error message:
"PHP Notice: Undefined variable: modelNo in E:\WWW\DEV\product.php on line 19"

I've tried every different way I can think of. Does anyone have any ideas?

Thanks a lot,
Dan

[Mindzai]

You need to exit() after sending the header to prevent the rest of the script from executing:

header('Location: /product-error.php'); 
exit(); 

[dtm32236]

Wow, that was simple.

Thanks a lot Mindzai!