Email(3pm)						User Contributed Perl Documentation						Email(3pm)

NAME

       Data::Validate::Email - common email validation methods

SYNOPSIS

	 use Data::Validate::Email qw(is_email is_email_rfc822);

	 if(is_email($suspect)){
	       print "Looks like an email address
";
	 } elsif(is_email_rfc822($suspect)){
	       print "Doesn't much look like an email address, but passes rfc822
";
	 } else {
	       print "Not an email address
";
	 }

	 # 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.

perl v5.10.0							    2009-02-01								Email(3pm)