Provided by: libdata-validate-email-perl_0.04-1_all 
NAME
Data::Validate::Email - common email validation methods
SYNOPSIS
use Data::Validate::Email qw(is_email is_email_rfc822);
if(is_email($suspect)){
print "Looks like an email address\n";
} elsif(is_email_rfc822($suspect)){
print "Doesn't much look like an email address, but passes rfc822\n";
} else {
print "Not an email address\n";
}
# or as an object
my $v = Data::Validate::Email->new();
die "not an email" unless ($v->is_email('foo'));
DESCRIPTION
This module collects common email validation routines to make input validation, and
untainting easier and more readable.
All functions return an untainted value if the test passes, and undef if it fails. This
means that you should always check for a defined status explicitly. Don't assume the
return will be true. (e.g. is_username('0'))
The value to test is always the first (and often only) argument.
FUNCTIONS
new - constructor for OO usage
new([\%opts]);
Description
Returns a Data::Validator::Email object. This lets you access all the validator
function calls as methods without importing them into your namespace or using the
clumsy Data::Validate::Email::function_name() format.
Arguments
An optional hash reference is retained and passed on to other function calls in
the Data::Validate module series. This module does not utilize the extra data,
but some child calls do. See Data::Validate::Domain for an example.
Returns
Returns a Data::Validate::Email object
is_email - is the value a well-formed email address?
is_email($value);
Description
Returns the untainted address if the test value appears to be a well-formed email
address. This method tries to match real-world addresses, rather than trying to
support everything that rfc822 allows. (see is_email_rfc822 if you want the more
permissive behavior.)
In short, it pretty much looks for something@something.tld. It does not
understand real names ("bob smith" <bsmith@test.com>), or other comments. It will
not accept partially-qualified addresses ('bob', or 'bob@machine')
Arguments
$value
The potential address to test.
Returns
Returns the untainted address on success, undef on failure.
Notes, Exceptions, & Bugs
This function does not make any attempt to check whether an address is genuinely
deliverable. It only looks to see that the format is email-like.
The function accepts an optional hash reference as a second argument to change the
validation behavior. It is passed on unchanged to Neil Neely's
Data::Validate::Domain::is_domain() function. See that module's documentation for
legal values.
is_email_rfc822 - does the value look like an RFC 822 address?
is_email_rfc822($value);
Description
Returns the untainted address if the test value appears to be a well-formed email
address according to RFC822. Note that the standard allows for a wide variety of
address formats, including ones with real names and comments.
In most cases you probably want to use is_email() instead. This one will accept
things that you probably aren't expecting ('foo@bar', for example.)
Arguments
$value
The potential address to test.
Returns
Returns the untainted address on success, undef on failure.
Notes, Exceptions, & Bugs
This check uses Casey West's Email::Address module to do its validation.
The function does not make any attempt to check whether an address is genuinely
deliverable. It only looks to see that the format is email-like.
is_domain - does the value look like a domain name?
is_domain($value);
Description
Returns the untainted domain if the test value appears to be a well-formed domain
name. This test uses the same logic as is_email(), rather than the somewhat more
permissive pattern specified by RFC822.
Arguments
$value
The potential domain to test.
Returns
Returns the untainted domain on success, undef on failure.
Notes, Exceptions, & Bugs
The function does not make any attempt to check whether a domain is actually
exists. It only looks to see that the format is appropriate.
As of version 0.03, this is a direct pass-through to Neil Neely's
Data::Validate::Domain::is_domain() function.
The function accepts an optional hash reference as a second argument to change the
validation behavior. It is passed on unchanged to Neil Neely's
Data::Validate::Domain::is_domain() function. See that module's documentation for
legal values.
is_username - does the value look like a username?
is_username($value);
Description
Returns the untainted username if the test value appears to be a well-formed
username. More specifically, it tests to see if the value is legal as the
username component of an email address as defined by is_email(). Note that this
definition is more restrictive than the one in RFC822.
Arguments
$value
The potential username to test.
Returns
Returns the untainted username on success, undef on failure.
Notes, Exceptions, & Bugs
The function does not make any attempt to check whether a username actually exists
on your system. It only looks to see that the format is appropriate.
AUTHOR
Richard Sonnen <sonnen@richardsonnen.com>.
COPYRIGHT
Copyright (c) 2004 Richard Sonnen. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.