nacdanh.php

<html>
<body>

<?php
if (isset($_REQUEST['email']) && isset($_REQUEST['emailto']))
//if "email" is filled out, send email
{
    //send email
    $email = $_REQUEST['email'] ;
    $emailto = $_REQUEST['emailto'] ;
    $subject = $_REQUEST['subject'] ;
    $message = $_REQUEST['message'] ;
    mail($emailto, $subject, $message, "From:" . $email);
    echo "Thank you for using our mail form";
}
else
//if "email" is not filled out, display the form
{
    echo "<form method='post' action='nacdanh.php'>
    Email From: <input name='email' type='text'><br>
    Email To: <input name='emailto' type='text'><br>
    Subject: <input name='subject' type='text'><br>
    Message:<br>
    <textarea name='message' rows='15' cols='40'>
    </textarea><br>
    <input type='submit'>
    </form>";
}
?>

</body>
</html>