Common email validation methods
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'));
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.
new([\%opts]);
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.
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 a Data::Validate::Email object
is_email($value);
Returns the untainted address if the test value appears to be a well-formed email address. This method tries to match real-world addresses, rather than trying to support everything that rfc822 allows. (see is_email_rfc822 if you want the more permissive behavior.) In short, it pretty much looks for [email protected]. It does not understand real names (\*(L"bob smith\*(R" <[email protected]>), or other comments. It will not accept partially-qualified addresses ('bob', or 'bob@machine')
The potential address to test.
Returns the untainted address on success, undef on failure.
This function does not make any attempt to check whether an address is genuinely deliverable. It only looks to see that the format is email-like. The function accepts an optional hash reference as a second argument to change the validation behavior. It is passed on unchanged to Neil Neely's Data::Validate::Domain::is_domain() function. See that module's documentation for legal values.
is_email_rfc822($value);
Returns the untainted address if the test value appears to be a well-formed email address according to \s-1RFC822\s0. 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.)
The potential address to test.
Returns the untainted address on success, undef on failure.
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($value);
Returns the untainted domain if the test value appears to be a well-formed domain name. This test uses the same logic as is_email(), rather than the somewhat more permissive pattern specified by \s-1RFC822\s0.
The potential domain to test.
Returns the untainted domain on success, undef on failure.
The function does not make any attempt to check whether a domain is actually exists. It only looks to see that the format is appropriate. As of version 0.03, this is a direct pass-through to Neil Neely's Data::Validate::Domain::is_domain() function. The function accepts an optional hash reference as a second argument to change the validation behavior. It is passed on unchanged to Neil Neely's Data::Validate::Domain::is_domain() function. See that module's documentation for legal values.
is_username($value);
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 \s-1RFC822\s0.
The potential username to test.
Returns the untainted username on success, undef on failure.
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.
Richard Sonnen <[email protected]>.
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.