/**
* Helper to validate a email address
*
* @static
* @param $emailAddress
* @return string | null - returns "null" if the email address is invalid otherwise the email address is returned
*/
public static function validateEmailAddress($emailAddress)
{
if (is_null(self::$validator)) {
self::$validator = new Zend_Validate_EmailAddress();
}
$emailAddress = trim($emailAddress);
if (self::$validator->isValid($emailAddress)) {
return $emailAddress;
}
}
