Stuff

<?PHP

function image_resize_on_upload($img0, $w0, $h0, $output_filename)
{
	$img = $img0;
	$w = $w0;
	$h = $h0;
	//$percent = $percent0;
	//$constrain = $constrain0;

	// get image size of img
	$x = @getimagesize($img);
	// image width
	$sw = $x[0];
	// image height
	$sh = $x[1];

	if ($percent > 0)
	{
		// calculate resized height and width if percent is defined
		$percent = $percent * 0.01;
		$w = $sw * $percent;
		$h = $sh * $percent;
	} else {
		if (isset ($w) AND !isset ($h))
		{
			// autocompute height if only width is set
			$h = (100 / ($sw / $w)) * .01;
			$h = @round ($sh * $h);
		} elseif (isset ($h) AND !isset ($w))
		{
			// autocompute width if only height is set
			$w = (100 / ($sh / $h)) * .01;
			$w = @round ($sw * $w);
		} elseif (isset ($h) AND isset ($w) AND isset ($constrain))
		{
			// get the smaller resulting image dimension if both height
			// and width are set and $constrain is also set
			$hx = (100 / ($sw / $w)) * .01;
			$hx = @round ($sh * $hx);

			$wx = (100 / ($sh / $h)) * .01;
			$wx = @round ($sw * $wx);

			if ($hx < $h) {
				$h = (100 / ($sw / $w)) * .01;
				$h = @round ($sh * $h);
			} else {
				$w = (100 / ($sh / $h)) * .01;
				$w = @round ($sw * $w);
			}
		}
	}

	$im = @ImageCreateFromJPEG ($img) or // Read JPEG Image
	$im = @ImageCreateFromPNG ($img) or // or PNG Image
	$im = @ImageCreateFromGIF ($img) or // or GIF Image
	$im = false; // If image is not JPEG, PNG, or GIF

	if (!$im)
	{
		readfile ($img);


	} else {
		$thumb = @ImageCreateTrueColor ($w, $h);
		@ImageCopyResampled ($thumb, $im, 0, 0, 0, 0, $w, $h, $sw, $sh);
		@ImageJPEG ($thumb, $output_filename, 100);


	}

}