Why not simply check if they are each one digit, and then if that one digit is within the valid range: 

use strict;
use warnings;

for (qw(1 5 10 a 4)) {
    warn "$_ is not an int\n" unless $_ =~ /\d/;
    warn "$_ is out of range\n" unless $_ >= 1 && $_ <= 7;
}

[download]
I use warn instead of die just to demonstrate checking all the "test data," and to demonstrate why you want to make sure the data is indeed a number before you try to compare it with numerical operators.

UPDATE: I left out discussion of untainting the values. Don't. If the data is invalid, then stop form processing. Make the user give you valid data. Naturally, you don't want to die in that case, but instead return the form with an error message (and hopefully the rest of their submitted, valid values intact).

UPDATE^2: Thanks for the catch ikegami. Got any snake venom handy?

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

In reply to Re: form checking checkboxes by jeffa
in thread form checking checkboxes by tanger

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