if ($what['mime'] == 'image/gif')
	$o_im = imageCreateFromGIF($_FILES['filename']['tmp_name']) ;
if ($what['mime'] == 'image/jpeg')
	$o_im = imageCreateFromJPEG($_FILES['filename']['tmp_name']) ;
if ($what['mime'] == 'image/png')
	$o_im = imageCreateFromPNG($_FILES['filename']['tmp_name']) ;

$t_im = imageCreateTrueColor($newwidth,$newheight);
imageCopyResampled($t_im, $o_im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
imageJPEG($t_im, $upload_dir .'/normal_' . $_FILES['filename']['name'],90);