You could use the isset() or the empty() functions.

http://us3.php.net/manual/en/function.empty.php
http://us3.php.net/manual/en/function.isset.php

But do you want to check all the fields that are being submitted or just 
specific ones that you set in the $reqfields array?  If you want to check all 
the submitted fields just run through the $_POST or $_GET arrays, depending on 
your form method.

jay


-----Original Message-----
From: Chris Lott [mailto:[EMAIL PROTECTED]
Sent: Mon 1/9/2006 2:31 PM
To: PHP General Mailing List
Subject: [PHP] Dynamic Array Index using Variable
 
I want to do something like this to check if a variety of submitted
form fields (crn, instructor, etc) have any value in them:

$reqfields = array('crn', 'instructor');
$errorflag = 0;

foreach ($reqfields as $field) {
        if ($_REQUEST[$field] == '') {
                $errorflag = 1;
        }
}

But I can't quite get the syntax right... help??

c

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