Email verification without form

ZendValidatorEmailAddress allows you to validate an email address. The validator first splits the email address on local-part @ hostname and attempts to match these against known specifications for email addresses and hostnames.

$validator = new ZendValidatorEmailAddress();
if ($validator->isValid($email)) {
    // email appears to be valid
} else {
    // email is invalid; print the reasons
    foreach ($validator->getMessages() as $message) {
        echo "$messagen";
    }
}

Options for validating EmailAddresses

ZendValidatorEmail supports several options which can either be set at initiation, by giving an array
with the related options, or afterwards, by using setOptions().The following options are supported:

• allow: Defines which type of domain names are accepted. This option is used in conjunction with the hostname
  option to set the hostname validator. For more information about possible values of this option, look at
  Hostname and possible ALLOW* constants. This option defaults to
  ALLOW_DNS.
• deep: Defines if the servers MX records should be verified by a deep check. When this option is set to
  TRUE then additionally to MX records also the A, A6 and AAAA records are used to verify if the server
  accepts emails. This option defaults to FALSE.
• domain: Defines if the domain part should be checked. When this option is set to FALSE, then only the
  local part of the email address will be checked. In this case the hostname validator will not be called. This
  option defaults to TRUE.
• hostname: Sets the hostname validator with which the domain part of the email address will be validated.
• mx: Defines if the MX records from the server should be detected. If this option is defined to TRUE then
  the MX records are used to verify if the server accepts emails. This option defaults to FALSE.

$validator = new ZendValidatorEmailAddress();
$validator->setOptions(array('domain' => false));