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About the developer

dominicsayers
216 Stars 42 Forks BSD 3-Clause "New" or "Revised" License 41 Commits 8 Opened issues

Description

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

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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 ISEMAILRFC5321 to ISEMAILDEPREC | | 2013-11-29 | meta.xml | 3.05 | Changed category of ISEMAILRFC5321IPV6DEPRECATED to ISEMAILDEPREC | | 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 | isemail.php | 3.0 | Forensic categorization of email validity |

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