使用HTML和Php的基本表单

I am trying to create just a basic form using Php and HTML. When I type into the fields and click submit nothing appears on the page except for "Hi,"

This is what I have for the HTML document

<!DOCTYPE html>
<html>
<head>
    <title>Php Form</title>
</head>
<body>
<form  method="post" action="PHPD1.php">
<label> First Name:<input name="FName" type="text"/></label>
    <br>
<label> Last Name:<input name="LName" type="text"/></label>
    <br>
<label>Message: <textarea name="message">
         </textarea>
    </label>
    <br>
    <input name="submit" type="submit" value="Submit"/>
</form>
</body>
</html>`

and for the php document I have

<html>

<head>

    <title>Deliverable 1</title>

</head>

<?php

// Capture the values posted to this php program from the text fields

$FName = $_POST['FName'] ;
$LName = $_POST['LName'] ;
$Message = $_POST['Message'] ;

?>

<body>
    Hi, <?php print $FName; ?>
<br>
<?php print $Message; ?>
</body>
</html>
       <textarea name="message">
         </textarea>

the name given for textarea is "message". so the same name should be used in the php page also to access the value.

instead of

     $Message = $_POST['Message'] ;

use

    $Message = $_POST['message'] ;

you have done a small mistake. just check now.