dominicsayers/isemail

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

is_email()

Copyright 2008-2016 Dominic Sayers dominic@sayers.cc, _(*1)

https://isemail.info, _(*2)

BSD License (https://www.opensource.org/licenses/bsd-license.php), _(*3)

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 = 'dominic@sayers.cc';
    $result = is_email($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