Quick sessions questions

[NeoGeo]

I'm going to be passing two variables to login.php. Depending on a few things these two variables might either be normal (i.e. from a form, or just set like $variable = "variable" and then passed to the page) or they might be session variables (variables that were registered via session_register("var1", "var2");

So, my question is - is there a way I can check to check if these are session variables or normal variables?

Thanks in advance,
Ben

[eoghain]

Session variables are stored in the $_SESSION array, so you can test if the variable exists there. But if you are just passing them in via a function call then there is no way to determin where the initial value came from.

[NeoGeo]

Ok it seems to be working, sort of... here's the problem I get now:

When I use this code:

session_start();

if($SESSION["user"] && $SESSION["password"]) {

echo "Session detected: User: $user Password: $pass";

}
else {

... session_register section ...

}

The output I get is this:

Session detected: User: Password:

So it seems to detect that the sessions are there - but they no longer have a value - am I missing something here?

Thanks in advance,
Ben

[NeoGeo]

I figured it out. I had to start my session before I sent them as variables to my function.

Ben