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reading from checkboxes in perl

 
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reading from checkboxes in perl
orangebulb
post 15 Apr, 2008 - 06:12 PM
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I need to use an if statement to see whether or not a checkbox is checked. I'm not sure how you do that in perl. For example, if a checkbox has the value set to "1" can I say if $variable == 1 ? I'm just really kind of confused on how to do that. Because doesn't the checkbox hold that value whether or not it's checked?

Any help is greatly appreciated. smile.gif
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girasquid
post 15 Apr, 2008 - 06:22 PM
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I find that in situations like these, it's easiest to just write a quick piece of code to test what you think it does - if it doesn't do that, come back and tell us and we'll help you figure it out. smile.gif
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fahlyn
post 15 Apr, 2008 - 07:29 PM
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if you're using CGI.pm you can do something like this...

CODE

use CGI;
my $q = CGI->new;
if($q->param('checkboxName')){
    #do whatever here
}


The key is that if a check box isn't checked it will not be submitted as part of the form.

Hope that helps.
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KevinADC
post 16 Apr, 2008 - 12:25 AM
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QUOTE(fahlyn @ 15 Apr, 2008 - 07:29 PM) *

if you're using CGI.pm you can do something like this...

CODE

use CGI;
my $q = CGI->new;
if($q->param('checkboxName')){
    #do whatever here
}


The key is that if a check box isn't checked it will not be submitted as part of the form.

Hope that helps.



The checkbox name/value pair will still be transmited, but it will have no value. CGI forms have no awarness of blank fields, which is why they are unable to verify themselves and you have to use javascript or server side validation to see if a form field is filled in with something.

Your code is checking that the form field has a true value, something besides "" (empty) or 0 (zero).
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