in reply to Reading Checkboxes

HMTL tip coming up:
All the checkboxes in the form must have different names. If they have the same name you will only get one value = 'on', even if all boxes are checked.

Update:
I stand corrected. The broken solution presented by Fastolfe is what I have had to use at work. I will have to try ColtsFoots solution next time around.

mr greywolf

Replies are listed 'Best First'.
Re: Re: Reading Checkboxes
by ColtsFoot (Chaplain) on Nov 05, 2001 at 12:50 UTC
    This does not seem to be the case, the following code 
    #!/usr/bin/perl -w
use strict;
use CGI;

my $cgi = new CGI;
print $cgi->header();
print $cgi->start_html();
my $submit = $cgi->param('submit');
if ($submit)
{
    my @on = $cgi->param('desig');
    foreach my $item (@on)
    {
        print qq($item<BR>);
    }
    exit;
}
print $cgi->startform(-method=>'post');
print $cgi->checkbox_group(-name=>'desig',
                -values=>['a', 'b', 'c', 'd', 'e', 'f', 'g']);
print $cgi->submit(-name=>'submit', -value=>'Submit');
print $cgi->endform();
print $cgi->end_html();

    [download]
    yields 
    a
c
e
g

    [download]
    when every other box is checked
[reply]
[d/l]
[select]
Re: Re: Reading Checkboxes
by Fastolfe (Vicar) on Nov 05, 2001 at 21:33 UTC
    Only if you're using a broken/proprietary CGI parameter parsing routine that does something like this: 
    foreach my $pair (split /&/, $ENV{QUERY_STRING}) {
   my ($key, $value) = split(/=/, $pair);
   $parameters{$key} = $value;
}

    [download]
    The correct solution is to defer processing like this to CGI.pm, which will correctly handle multiple checkboxes with the same name.
[reply]
[d/l]

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