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August 30, 2008 03:08am pdt
 
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Attachment Details

Detecting empty variables in CGI script

Tags: perl, empty, variable, blank
Hi All,

This should be easy for you PERL folks.

I have some of the fields in my guestbook script that are mandatory and I'm seeing where whitespace is entered in those fields and it makes it through instead of giving an error.

This is the part I'm looking at

####
sub test_required
{
 foreach $tst (@mandatory)
  {
    if ($fields{$tst} eq "")
    {
     $errmesg ="<B>You did not fill in all of the required information.<BR>";
     $errmesg .= "Press your BACK BUTTON to return to the entry form!</B>";
     &error_exit;
    }
 }
}
###

How would I change the "if" line to match any blank field ("") AND any field that has just whitespace (spaces or tabs)?  

Thanks!!

Gary
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Question Stats
Zone: Programming
Question Asked By: grsteed
Solution Provided By: clockwatcher
Participating Experts: 2
Solution Grade: A
Views: 4
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