Untitled

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
</head>

<body>
<form action="PP.php" method="post">
<input type="text" name="Data">
<input type="submit" name="Add" value="Add">
</form>
<table width="100%" border="1">
<tr><td>Data</td></tr>
<?php if(isset($_POST['Add'])){?>
<tr><td><input type="text" name="Data2" value="<?php echo $_POST['Data'];?>"
<?php echo $_POST['Data'];?></td></tr>
<?php }?>
</table>

</body>
</html>