If you want a PHP script to validate an email address here is a quick and simple PHP regular expression to do it. This script is also case-insensitive, so it will treat all characters as lower case. This script is a simple and easy way to check the syntax and format of an email address.
The code
<?php
$email = "someone@example.com";
if(eregi("^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3})$", $email)) {
echo "Valid email address.";
}
else {
echo "Invalid email address.";
}
?>
Keep up the good work.
good example