[thelist] help me understand global variable in PHP

shawn allen shawn at alterior.net
Thu Jan 2 12:44:00 CST 2003

quoth Tom Dell'Aringa:
> Now, my problem is - I want to pass along $prodname to the next page
> I am going to via the query string. So I have something like
> /path.php?p=$prodname. This variable however is always empty. This
> line of code is OUTSIDE the functions of course.

Without knowing how your host is configured, I'm willing to bet that
PHP's 'register_globals' directive is set to 'off'. This is a Good
Thing(tm). To retrieve a request variable, you have to pull the value
from the $_REQUEST array:

$prodname = $_REQUEST['prodname'];

Or, if you're sure it'll always come from a GET request on the query

$prodname = $_GET['prodname'];

The so-called "superglobals", $_GET, $_POST, $_SERVER, $_REQUEST, and
others, are scope-independent; you won't have to globalize them within
any of your functions. Take a look at the PHP manual page if you need
any more info:


shawn allen

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