public function uploadPhoto($photo){
    $this->load->model("misc_model");

    //required vars
    $tmp_name = $photo["tmp_name"];
    $name = $photo["name"];
    $type = $photo["type"];
    $size = $photo["size"];
    $error_upload = $photo["error"];


    $random_str = $this->misc_model->generateRandomNumber(20, true, true);

    $this->s3->putBucket($this->config->item("bucket"), S3::ACL_PUBLIC_READ);

    if($this->s3->putObjectFile($tmp_name, $this->config->item("bucket") , 'photos/'.$random_str.".jpg", S3::ACL_PUBLIC_READ) ){
        echo 'ok';
    }else{
        echo 'fail';
    }

}