is_email() is a PHP function that checks the validity of an email address. It tests whether the given address conforms to the followings RFCs: 5321, 5322, 4291, 2821, 2822, 3696, and 1123 (section 2.1).
|Tags||PHP Email address validation|
Release Notes: The text of is_email_statustext.php was amended to more accurately reflect the error condition of ISEMAIL_IPV6BADCHAR. A test was added to test missing outcome of ISEMAIL_IPV6TOOMANYGROUPS.