function get_remote_file_size($url, $readable = true){
   $parsed = parse_url($url);
   $host = $parsed["host"];
   $fp = @fsockopen($host, 80, $errno, $errstr, 20);
   if(!$fp) return false;
   else {
       @fputs($fp, "HEAD $url HTTP/1.1\r\n");
       @fputs($fp, "HOST: $host\r\n");
       @fputs($fp, "Connection: close\r\n\r\n");
       $headers = "";
       while(!@feof($fp))$headers .= @fgets ($fp, 128);
   }
   @fclose ($fp);
   $return = false;
   $arr_headers = explode("\n", $headers);
   foreach($arr_headers as $header) {
			// follow redirect
			$s = 'Location: ';
			if(substr(strtolower ($header), 0, strlen($s)) == strtolower($s)) {
				$url = trim(substr($header, strlen($s)));
				return get_remote_file_size($url, $readable);
			}
			
			// parse for content length
       $s = "Content-Length: ";
       if(substr(strtolower ($header), 0, strlen($s)) == strtolower($s)) {
           $return = trim(substr($header, strlen($s)));
           break;
       }
   }
   if($return && $readable) {
			$size = round($return / 1024, 2);
			$sz = "KB"; // Size In KB
			if ($size > 1024) {
				$size = round($size / 1024, 2);
				$sz = "MB"; // Size in MB
			}
			$return = "$size $sz";
   }
   return $return;
}