<?php
if($_POST)
{
    $to_email       = "you_email@mail.com"; //Recipient email, Replace with own email here

    //check if its an ajax request, exit if not
    if(!isset($_SERVER['HTTP_X_REQUESTED_WITH']) AND strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest') {

        $output = json_encode(array( //create JSON data
            'type'=>'error',
            'text' => 'Sorry Request must be Ajax POST'
        ));
        die($output); //exit script outputting json data
    }

    //Sanitize input data using PHP filter_var().
    $name      = filter_var($_POST["name"], FILTER_SANITIZE_STRING);
    $email     = filter_var($_POST["email"], FILTER_SANITIZE_EMAIL);
    $message   = filter_var($_POST["message"], FILTER_SANITIZE_STRING);

    //email body
    $message_body = $message."\r\n\r\n-".$name."\r\nEmail : ".$email;

    //proceed with PHP email.
    $headers = 'From: '.$email.'' . "\r\n" .
    'Reply-To: '.$email.'' . "\r\n" .
    'X-Mailer: PHP/' . phpversion();

    $send_mail = @mail($to_email, $name, $message_body, $headers);


        $output = json_encode(array('type'=>'message', 'text' => 'Hi '.$name .'! Thank you for your email'));
        die($output);
}
?>