user input/output

<?php
if (isset($_GET['Submit'])) {
	$userID = $_GET['userID'];
	$input2 = $_GET['input2'];
	$input3 = $_GET['input3'];
	?>
    www.example.com/<?php echo $userID; ?><br/>
    hello, <?php echo $input2; ?> and <?php echo $input3; ?>.
<?php } else {
?>
<form action="./" method="get">
	<input type="text" name="userID"/><br/>
	<input type="text" name="input2"/><br/>
	<input type="text" name="input3"/><br/>
	<input type="submit" name="Submit" value="Submit"/>
</form>
<?php } ?>