GeekLab

$rpcurl='http://www.geeklab.info/xmlrpc.php';
$username='admin';
$password='your-password';
$blogid=1; //Post ID
 
$file=file_get_contents('file.jpg');
$filetype = "image/jpeg";
$filename = "remote_filename.jpg";
 
xmlrpc_set_type($file,'base64'); // <-- required!
$params = array($blogid,$username,$password,
            array('name'=>$filename,'type'=>$filetype,'bits'=>$file,'overwrite'=>false));
$request = xmlrpc_encode_request('wp.uploadFile',$params);
 
$result = go($request,$rpcurl);
print_r($result);
 
function go($request,$rpcurl){
    $ch = curl_init();
    curl_setopt($ch,CURLOPT_POST,1);
    curl_setopt($ch,CURLOPT_URL,$rpcurl);
    curl_setopt($ch,CURLOPT_POSTFIELDS,$request );
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
    $result = curl_exec($ch);
}