Something

	$source = $_GET['src'];
	$filename = explode("/", $source);
	
	$thumb_height = 120;
	$thumb_width = 120;
	$folder = "thumb/";
	
	if($_GET['type'] == 'landscape') {
		$thumb_width = 216;
		$thumb_height = 160;
		$folder = $_GET['type'].'/';
	}
	
	if($_GET['type'] == 'landscape-big') {
		$thumb_width = 248;
		$thumb_height = 184;
		$folder = $_GET['type'].'/';
	}
	
	if($_GET['type'] == 'globophoto') {
		$thumb_width = 179;
		$thumb_height = 179;
		$folder = $_GET['type'].'/';
	}
	
	if($_GET['type'] == 'mapthumb') {
		$thumb_width = 70;
		$thumb_height = 70;
		$folder = $_GET['type'].'/';
	}
	
	if(!file_exists('thumbcache/'.$folder.$filename[1])) {
    	$size = getimagesize($source);
    	$width = $size[0];
    	$height = $size[1];
 		
    	if($width> $height) {
    	    $x = ceil(($width - $height) / 2 );
    	    $width = $height;
    	} elseif($height> $width) {
    	    $y = ceil(($height - $width) / 2);
    	    $height = $width;
    	}
 		
 		$new_im = ImageCreatetruecolor($thumb_width,$thumb_height);
    	$im = imagecreatefromjpeg($source);
    	imagecopyresampled($new_im,$im,0,0,$x,$y,$thumb_width,$thumb_height,$width,$height);
    	imagejpeg($new_im,'thumbcache/'.$folder.$filename[1],100);
    	header('Content-Type: image/jpeg');
    	imagejpeg($new_im,null,100);
    } else {
    	$im = imagecreatefromjpeg('thumbcache/'.$folder.$filename[1]);
    	header('Content-Type: image/jpeg');
    	imagejpeg($im,$dest,100);
    }