Forms/CGI question

[Mark Cyzyk]

Attached below is a subroutine I wrote to check whether certain fields on
a webform have been filled-in.  If the specified field is blank the client
is returned an error message and is asked to go back and fill it in. 

Hope this helps,

<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><
Mark Cyzyk, M.A., M.L.S.                     mcyzyk at midget.towson.edu
Albert S. Cook Library                        mcyzyk at tiger.towson.edu
Library and Instructional Technologies                 (410) 830-4285
Towson State University                            FAX (410) 830-3829
Towson, Maryland 21252                  http://www.towson.edu/~mcyzyk


######################### SUB FIELDCHECK ##########################
# This subroutine checks to make sure the client has filled in several
# "required" fields, e.g., Last Name, First Name, Phone Number, Title, 
# etc.  If the client has not supplied this information, an error message
# is returned.
sub FieldCheck
{
		
# Here is a list of required fields:
%list = (
"Last Name", $in{last_name},
"First Name", $in{first_name},
"Library Barcode", $in{library_barcode},
"Home Phone", $in{home_phone},
"Cancel By", $in{cancel},
"Pay", $in{pay},
"Author or Editor", $in{author_or_editor},
"Title", $in{title});

while (($fieldname, $value) = each(%list))
	{
	if ($value eq "")
		{
		$required = "
			The <i>$fieldname</i> field must be filled in 
			for your submission to be accepted.<p>
			Please return to your original form, 
			edit it appropriately, and resubmit.";
		&CgiError("Required Information is Missing!", $required);
		exit 0;
		}
	}
}













On Thu, 24 Apr 1997, Christopher Adams wrote:

> I am writing a CGI script that will allow users to submit information 
> through a web page. I want to require that certain text fields be filled 
> out. From what I gather, there are no form tags that will do this. One 
> example I saw used "hidden" field tags and processed the script using a 
> second script, but I don't really understand how it works. Any ideas? 
> Please cc to me and mail to the list, as I am on the digest. Thanks.
> 
> Christopher Adams
> Automated Systems
> Oregon State Library
> chris at sparkie.osl.state.or.us
> 
>