尝试更新数据库中的客户端状态时出错

Question

I'm trying to send some parameters in the object method, however I'm getting an error that I can not resolve. Note: The error happens before going to the method.

<?php 

    if($fatura->getStatus() == 0){
        //log
    }else if($num > 0){


        //id_cliente, id_transacao, status, data_vencimento, data_gerada, valor
            while ($row = $stmt->fetch(PDO::FETCH_ASSOC)){

                extract($row);

                //         
                $idCliente = $row['idCliente'];
                $idTransacao = $row['transacao'];
                $data = $row['vencimento'];

                //requisitar o status do cliente
                $status = $fatura->verificarStatus($idTransacao);
                $transacao->atualizarFatura(intval($idCliente), intval($idTransacao), $status, $data);




            } 

    }else{
        //log
    }

?>

Fatal error: Uncaught Error: Call to a member function atualizarFatura() on string in /srv/http/application/application/financeiro_atualizar.php:50 Stack trace: #0 {main} thrown in /srv/http/application/application/financeiro_atualizar.php on line 50