SubHero,
$RealImage = ImageCreateFromJPEG('x.jpg');
$X = ImagesX($RealImage) / 2;
$Y = ImagesY($RealImage);
$RealTotal = ImageCreateTrueColor($X, $Y);
ImageCopy($RealTotal , $RealImage, 0, 0, 0, 0, $X, $Y);
header('Content-Type: image/jpeg');
ImageJPEG($RealTotal);
ImageDestroy($RealTotal);
ImageDestroy($RealImage);