This one should be simple.

I am wondering if there is a simple way in which to stop the processing of a
file.

The current example is a program that checks to see if the user is logged
in. In the past I have done something like this:

if ($loggedIn != true) {
    echo "You are not logged in.";
}
else {
    echo "Welcome";
}

This, however, becomes a substantial problem (or at least annoyance) when
the else is pages long. I would prefer to have something like:

if ($loggedIn != true) {
    echo "You're not logged in.";
    // stop process of file here
}
// Page content (with no else)

The ultimate objective is to have a simple function in the my class include
file to verify that the user is always logged in.

Thanks in advance.

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