NAME

Data::FormValidator::Constraints - Basic sets of constraints on input profile.

SYNOPSIS

In an Data::FormValidator profile:

    constraints  =>
        {
            email       => "email",
            fax         => "american_phone",
            phone       => "american_phone",
            state       => "state",
        },

DESCRIPTION

Those are the builtin constraints that can be specified by name in the input profiles.

email

Checks if the email LOOKS LIKE an email address. This checks if the input contains one @, and a two level domain name. The address portion is checked quite liberally. For example, all those probably invalid address would pass the test :

    nobody@top.domain
    %?&/$()@nowhere.net
    guessme@guess.m

state_or_province

This one checks if the input correspond to an american state or a canadian province.

state

This one checks if the input is a valid two letter abbreviation of an american state.

province

This checks if the input is a two letter canadian province abbreviation.

zip_or_postcode

This constraints checks if the input is an american zipcode or a canadian postal code.

postcode

This constraints checks if the input is a valid Canadian postal code.

zip

This input validator checks if the input is a valid american zipcode : 5 digits followed by an optional mailbox number.

phone

This one checks if the input looks like a phone number, (if it contains at least 6 digits.)

american_phone

This constraints checks if the number is a possible North American style of phone number : (XXX) XXX-XXXX. It has to contains 7 or more digits.

cc_number

This is takes two parameters, the credit card number and the credit cart type. You should take the hash reference option for using that constraint.

The number is checked only for plausibility, it checks if the number could be valid for a type of card by checking the checksum and looking at the number of digits and the number of digits of the number.

This functions is only good at weeding typos and such. IT DOESN'T CHECK IF THERE IS AN ACCOUNT ASSOCIATED WITH THE NUMBER.

cc_exp

This one checks if the input is in the format MM/YY or MM/YYYY and if the MM part is a valid month (1-12) and if that date is not in the past.

cc_type

This one checks if the input field starts by M(asterCard), V(isa), A(merican express) or D(iscovery).

ip_address

This checks if the input is formatted like an IP address (v4)

REGEXP::COMMON SUPPORT

Data::FormValidator also includes built-in support for using any of regular expressions in Regexp::Common as named constraints. Simply use the name of regular expression you want. This works whether you want to untaint the data or not. For example:

 constraints => {
        my_ip_address => 'RE_net_IPv4',
 }

Some Regexp::Common regular expressions support additional flags that are expected to be passed into the routine as arguments. We support this as well. Just use hash style method of declaring a constraint, and the params key:

 constraints => {
        my_ip_address => {
                constraint => 'RE_net_IPv4',
                params => [ \'-sep'=> \' ' ],
        }
 }

Yes, it's a bit strange that you have pass the values to param by reference using the backslash ("\"). This is necessary to preserve some important backward compatibility that I haven't figured out how to work around yet.

Be sure to check out the Regexp::Common syntax for how its syntax works. It will make more sense to add future regular expressions to Regexp::Common rather than to Data::FormValidator.

PROCEDURAL INTERFACE

You may also call these functions directly through the procedural interface by either importing them directly or importing the whole :validators group. This is useful if you want to use the built-in validators out of the usual profile specification interface.

For example, if you want to access the email validator directly, you could either do:

    use Data::FormValidator::Constraints (qw/valid_email/);
    or
    use Data::FormValidator::Constraints (:validators);

    if (valid_email($email)) {
      # do something with the email address
    }

Notice that when you call validators directly, you'll need to prefix the validator name with "valid_"

Each validator also has a version that returns the untainted value if the validation succeeded. You may call these functions directly through the procedural interface by either importing them directly or importing the :matchers group. For example if you want to untaint a value with the email validator directly you may:

    if ($email = match_email($email)) {
        system("echo $email");
    }
    else {
        die "Unable to validate email";
    }

Notice that when you call validators directly and want them to return an untainted value, you'll need to prefix the validator name with "match_"

SEE ALSO

Data::FormValidator(3), Data::FormValidator::Filters(3), Data::FormValidator::ConstraintsFactory(3), Regexp::Common

CREDITS

Some of those input validation functions have been taken from MiniVend by Michael J. Heins <mike@heins.net>

The credit card checksum validation was taken from contribution by Bruce Albrecht <bruce.albrecht@seag.fingerhut.com> to the MiniVend program.

AUTHORS

    Francis J. Lacoste <francis.lacoste@iNsu.COM>
    Michael J. Heins <mike@heins.net>
    Bruce Albrecht  <bruce.albrecht@seag.fingerhut.com>

COPYRIGHT

Copyright (c) 1999 iNsu Innovations Inc. All rights reserved.

Parts Copyright 1996-1999 by Michael J. Heins <mike@heins.net> Parts Copyright 1996-1999 by Bruce Albrecht <bruce.albrecht@seag.fingerhut.com>

This program is free software; you can redistribute it and/or modify it under the terms as perl itself.

cpanm Data::FormValidator

perl -MCPAN -e shell
install Data::FormValidator