Archief - PHP: Image Resizing, RAAR probleem

function createthumb($filename) {
	$maxwidth = 125;
	$maxheight = 150;
	$simg = imagecreatefromjpeg($filename);
	$currwidth = imagesx($simg);
	$currheight = imagesy($simg);

	if ($currheight>$currwidth*1.7) {
	   $zoom=$maxheight/$currheight;
	   $newheight=$maxheight;
	   $newwidth=$currwidth*$zoom;
	}else{
	   $zoom=$maxwidth/$currwidth;
	   $newwidth=$maxwidth;
	   $newheight=$currheight*$zoom;
	}
	
	$dimg = imagecreate($newwidth, $newheight);
	
	imagetruecolortopalette($simg, false, 256);
	$palsize = ImageColorsTotal($simg);
	for ($i = 0; $i<$palsize; $i++){
	   $colors = ImageColorsForIndex($simg, $i);
	   ImageColorAllocate($dimg, $colors['red'], $colors['green'], $colors['blue']);
	}
	
	imagecopyresized($dimg, $simg, 0, 0, 0, 0, $newwidth, $newheight, $currwidth, $currheight);
	imagejpeg($dimg, '', 100);
	imagedestroy($simg);
	imagedestroy($dimg);
}

			$photo=$DB_site->query_first("SELECT filename, dateline FROM site_photos WHERE id='".addslashes($_GET['id'])."' LIMIT 1");
			header("Cache-control: max-age=31536000");
			header("Expires: " . gmdate("D, d M Y H:i:s",time()+31536000) . " GMT");
			header("Content-disposition: inline; filename=$photo[filename]");
			header("Content-Length: ".strlen($filedata));
			header("Last-Modified: " . gmdate("D, d M Y H:i:s",$photo[dateline]) . " GMT");
			
			$extension = substr(strrchr(strtolower($photo[filename]), '.'),1);
			
			if($extension == 'jpg') {
				header('Content-type: image/jpeg');
			}elseif ($extension == 'png') {
				header('Content-type: image/png');
			}else{
				header('Content-type: image/gif');
			}
			
			createthumb($config[photo_dir]."/".$photo[filename]);
			exit();