Use of undefined constant????

[Krucifyx]

This has been really pissing me off. I'm using error_reporting(15), and whenever I try to call on an array, I get this error:

Warning: Use of undefined constant field - assumed 'field' in filename on line x

WTF!!!!!!! Why the hell am I receiving this error!!!!:

The code:

if (isset($HTTP_COOKIE_VARS[cookie])) {
print "test";
} elseif (isset($login)) {
print "test2";
} else {
print "test3";
}

[Dennis Wrenn]

if cookie is a variable you need $ in front of it, and if its supposed to be a string, enclose it in quotes.