MisterFixx

<?php
function flip(&$img)
{
	$size_x = imagesx($img);
	$size_y = imagesy($img);
	$temp = imagecreatetruecolor($size_x, $size_y);
	$x = imagecopyresampled($temp, $img, 0, 0, ($size_x-1), 0, $size_x, $size_y, 0-$size_x, $size_y);
	return $temp;
}