PHP validate email script is an easy way to validate an email address. Use this quick and simple PHP regular expression for email validation.

$email='your email';

if(!preg_match("/^[\.A-z0-9_\-]+[@][A-z0-9_\-]+([.][A-z0-9_\-]+)+[A-z]{1,4}$/", $email)) echo "Not valid Email.";