PHP Switch help

Hi All

I'm using a PHP switch routine to choose which text is used on a page, depending on which link is pressed prior to the page opening (the link passes the case number via the URL).

It works well, except, it echos/prints the case name of the text after the text also!

So:

	$txt=$_GET[txt];
switch ($txt) {
	case "1" :
		echo "Test1.";
	break;
	case "2" :
		echo "Test2.";
	break;
	case "3" :
		echo "Test3.";
	break;
	}

Then further down the page in the html:

<p><?php echo $txt ?></p>

This will result in something like this being displayed on the page:

Test1.

1

So the case number 1 is being displayed! :?

I understand (perhaps) why it's doing it, but, being a PHP person only when necessary, my knowledge of a fix is limited (or, time better spent elsewhere!)

Any ideas?