Sending values through URL

Can i send more than one value through the url

Sending them im doing this

[code=php]<a href=”deletecomment.php?fileId=<?php echo “$blobId”; ?>?userid=<?php echo $row[“Username”]; ?>”>[/code]

And getting the values like this

[code=php]
$user = $_GET[‘userid’];

$blobid = $_GET[‘fileId’];

[/code]

but i get this error

[quote]

Notice: Undefined index: userid in c:program fileseasyphp1-8wwwnew folderdeletecomment.php on line 9

[/quote]

the values appear in the url as so

[quote]

deletecomment.php?fileId=143?userid=paul

[/quote]

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