Get Image Size Through CURL in PHP [duplicate]

Question

I Was Using This Code to Get Image size in php and it was working Perfectly For Me.

$img = get_headers("http://ultoo.com/img_single.php", 1);
$size = $img["Content-Length"];
echo $size;

But How Get this through CURL ? I Tried This But Doesn't Work.

$url = 'http://ultoo.com/img_single.php';
$ch = curl_init();
 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_HEADER, 1);
 curl_setopt($ch, CURLOPT_HTTPHEADER, "Content-Length" );
 //curl_setopt($ch, CURLOPT_NOBODY, 1);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 $result = curl_exec($ch);

 $filesize = $result["Content-Length"];

  curl_close($ch);

  echo $filesize;

Answer 1

set curl_setopt($ch, CURLOPT_HTTPHEADER, true );,then print_r($result),you will see something like

HTTP/1.1 200 OK
Date: Tue, 04 Jun 2013 03:12:38 GMT
Server: Apache/2.2.15 (Red Hat)
X-Powered-By: PHP/5.3.3
Set-Cookie: PHPSESSID=rtd17m2uig3liu63ftlobcf195; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Length: 211
Content-Type: image/png

I don't think Content-Length is the right way to get image size,because I get different result between curl and get_header