php - Codeigniter dropbox api -

i tried make upload in codeigniter jimdoescode library got error:

a php error encountered

severity: 8192

message: curl_setopt(): usage of @filename api file uploading deprecated. please use curlfile class instead

filename: libraries/dropbox.php

line number: 493

code in library curl is:

private function _connect($url, $header, $request, $postdata = false, $destination = false) {     $ch = curl_init($url);     curl_setopt($ch, curlopt_httpauth, curlauth_basic ) ;     curl_setopt($ch, curlopt_sslversion, 1); // require tls     curl_setopt($ch, curlopt_ssl_verifypeer, true);     curl_setopt($ch, curlopt_ssl_verifyhost, 2);     curl_setopt($ch, curlopt_cainfo, __dir__."/certs/trusted-certs.crt");     curl_setopt($ch, curlopt_capath, __dir__."/certs/");     curl_setopt($ch, curlopt_returntransfer, true);     curl_setopt($ch, curlopt_customrequest, $request);     curl_setopt($ch, curlopt_httpheader, explode(self::line_end, $header));     curl_setopt($ch, curlinfo_header_out, true);      if(is_array($postdata))     {         curl_setopt($ch, curlopt_post, true);         curl_setopt($ch, curlopt_postfields, $postdata);     }      $response = curl_exec($ch);      if(self::debug)     {         error_log(print_r(curl_getinfo($ch), true));         error_log($response);     }      $code = curl_getinfo($ch, curlinfo_http_code);     curl_close($ch);      //if content request write file     if($destination !== false)     {         //if response write         //the file , return true         if($code == '200')         {             $fh = fopen($destination, 'w');             fwrite($fh, $response);             if($fh !== false)             {                 fclose($fh);                 return true;             }         }         //the response bad or file couldn't         //be written return false.         return false;     }     else return $response; } 

can me this, cause not familiar this.