Write a simple PHP program to check that email id is valid or not

PHP is a server scripting language, and It is a powerful tool for making interactive and dynamic Web-pages. I have used WampServer 2.2 for following excercise..

<?php
// Passing valid/invalid email
$email = "techstudy.org@gmail.com";
if (filter_var($email, FILTER_VALIDATE_EMAIL)) 
{     
 
     echo '"' . $email . '" is valid Email ID'."\n";
}
else 
{     
     echo '"' . $email . '" is invalid Email ID'."\n";
}
?>

Result:

"techstudy.org@gmail.com" is valid Email ID