[Resolved] $_POST & $_GET Vars

rcoursey

I have an application where a control variable (let's call it $mo) is passed from one HTML page to an action script which may display a page or not.

In some cases I pass the variable in the URL ($GET) in the next script and sometimes I pass the variable in a form via post ($POST). The action script needs to allow either to be assigned to a variable in the recieving script.

Is this ok? And if so, which should be assigned first:

1)
$mo=$GET['mo'];
$mo-$POST['mo'];

or
2)
$mo-$POST['mo'];
$mo=$GET['mo'];

Thanks,
Richard

LordShryku

I'd probably get a little more indepth than that.

if(isset($_POST['mo']) && !empty($_POST['mo'])) {
   $mo = $_POST['mo'];
}
elseif(isset($_GET['mo']) && !empty($_GET['mo'])) {
   $mo = $_GET['mo'];
}
else {
   // mo doesn't exist
}

rcoursey

So, I check for the $POST var and if it doesn't exist look for the $GET var.

Why check isset && !empty ? could one be set and not empty?

LordShryku

Yep, it's possible, and fairly common.

Weedpacket

It's also possible for a variable to be set and empty, or unset and empty, but I suspect it would be difficult for a variable to be unset and nonempty.

magic-chef

Thanks for the help on this issue!

superwormy

You could also use $_REQUEST, which looks for GET, POST, COOKIE or SESSION vars, in a set-able order defined in the php.ini file...