<?
//--- define image
$image = "./watermerk.jpg";

if ($_GET['rotate'])
{
	header('content-type: image/jpeg');

	$image = imagecreatefromjpeg($image);
	$image = imagerotate($image, $_GET['rotate'], 0);

	imagejpeg($image);
}
else
{
	echo "<p><img src=\"" . $image . "\" alt=\"\" /></p>";

	echo "<p>Rotate: <a href=\"" . $_SERVER['PHP_SELF'] . "?rotate=90\" title=\"Rotate 90 &#176;\">90&#176;</a> links<br />";
	echo "Rotate: <a href=\"" . $_SERVER['PHP_SELF'] . "?rotate=270\" title=\"Rotate 90 &#176;\">90&#176;</a> rechts</p>";

	echo "<p>Rotate: <a href=\"" . $_SERVER['PHP_SELF'] . "?rotate=180\" title=\"\">180</a></p>";
}
?>