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The important thing here, though, is that your tutorial is out of date. If you have similar problems doing what it suggests, refer to http://www.php.net/manual/en/language.v ... efined.php, and check out the "Superglobal Arrays" section.
Yeah. The reason I put them into variables is because often you will do things with the data, not just echo it. To do things with it, it is easier to put it into a shorter variable first.