function remote_filesize($url, $user = "", $pw = "")  {      ob_start();      $ch = curl_init($url);      curl_setopt($ch, CURLOPT_HEADER, 1);      curl_setopt($ch, CURLOPT_NOBODY, 1);      if(!empty($user) && !empty($pw))      {          $headers = array('Authorization: Basic ' .  base64_encode("$user:$pw"));          curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);      }      $ok = curl_exec($ch);      curl_close($ch);      $head = ob_get_contents();      ob_end_clean();      $regex = '/Content-Length:\s([0-9].+?)\s/';      $count = preg_match($regex, $head, $matches);      return isset($matches[1]) ? $matches[1] : "unknown";  }

<?php  $file = "http://koonk.com/images/logo.png";  $size = remote_filesize($url);  echo $size;  ?>