graste / isemail

Checks an email address against the following RFCs: 3696, 1123, 4291, 5321, 5322

is_email()

Copyright 2008-2016 Dominic Sayers [email protected]

https://isemail.info

BSD License (https://www.opensource.org/licenses/bsd-license.php)

How to use is_email()

1. Add the downloaded file is_email.php to your project
2. In your scripts use it like this:

	require_once 'is_email.php';
	if (is_email($email)) echo "$email is a valid email address";

1. If you want to return detailed diagnostic error codes then you can ask is_email to do so. Something like this should work:

	require_once 'is_email.php';
	$email = '[email protected]';
	$result = is_email($email, true, true);

	if ($result === ISEMAIL_VALID) {
		echo "$email is a valid email address";
	} else if ($result < ISEMAIL_THRESHOLD) {
		echo "Warning! $email has unusual features (result code $result)";
	} else {
		echo "$email is not a valid email address (result code $result)";
	}

1. Example scripts are in the extras folder

Version history

Date	Component	Version	Notes
2016-12-07	(all)	3.0.7	Semantic version numbering
2016-12-05	(all)	3.06	Changed all http links to https. Updated my links. Updated copyright. Clarified license
2013-11-29	tests.xml	3.05	Changed Test #71 from ISEMAIL_RFC5321 to ISEMAIL_DEPREC
2013-11-29	meta.xml	3.05	Changed category of ISEMAIL_RFC5321_IPV6DEPRECATED to ISEMAIL_DEPREC
2011-07-14	tests.xml	3.04	Changed my link to https://isemail.info
2011-05-23	tests.xml	3.02	tests.php: Argument no longer passed by reference (deprecated). Test#32: Changed domain to c--n.com because g--a.com no longer has an MX record.
2010-11-15	meta.xml	3.03	Clarified definition of Valid for numpties
2010-10-18	tests.xml	3.0	New schema designed to enhance fault identification.
2010-10-18	is_email.php	3.0	Forensic categorization of email validity