Variable passed over url error

I have a php page that I want to pass a variable to on the url as the example

Code:

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http://server.local/fixtures/display.php?teamid=1

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This works fine if I put a value in for teamid but if I forget it/ omit it for any reason I want the script to die so I tried the following

Code:

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if (!teamid){
die ('No variable entered');
}

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but it kills the code even with the variable in the line.

How do I do this?

How about this:

if (empty($_GET['teamid'])){
die ('No variable entered');
}

Although that will count 0 as empty so I tend to do them like this

if(isset($_GET['teamid'])){
$teamid= $_GET['teamid'];
}
else{
die ('No variable entered');
}

Thank you that worked perfectly.

what about (i know you've already fixed it)

if(!isset($_GET["teamid"])) die(no variable set);

thats what i have used for a ?debug=1 ID

Quote:

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Originally Posted by MK-2

what about (i know you've already fixed it)

if(!isset($_GET["teamid"])) die(no variable set);

thats what i have used for a ?debug=1 ID

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But @cromertech is probably going to want to use $teamid elsewhere in the script so far better move it into an easier to reference variable than $_GET['teamid'] everytime he needs it.

Quote:

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Originally Posted by Hightower

But @cromertech is probably going to want to use $teamid elsewhere in the script so far better move it into an easier to reference variable than $_GET['teamid'] everytime he needs it.

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fine.....shoot me down......be like that......(cant think of any other sulky quotes, google any you want!)
i only used the debug one as it gives me access to pages i wouldnt normally see based on my group membership, so it was really only functional once per page, i see what you mean (something else new to learn :))

Quote:

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Originally Posted by MK-2

fine.....shoot me down......be like that......(cant think of any other sulky quotes, google any you want!)
i only used the debug one as it gives me access to pages i wouldnt normally see based on my group membership, so it was really only functional once per page, i see what you mean (something else new to learn :))

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Yep, only pointed it out as I knew you were getting to grips with PHP and thought it was handy to understand why one might choose the first bit of mentioned code over your code :)