Pesan editor di controller Penulis

ket.php

 public function pesaneditor($id,$paket){

        $user= ambilData('users',['id_user'=>$id]);
        $data['paket'] = $paket==0?'Standar':'Express';
        $editor= ambilData('editor',['user_id'=>$id]);
        $data['editor'] = $editor;
        $data['harga'] = $paket==0?$editor->hargabiasa:$editor->hargaexpres;
        $data['user'] = $user;

        $data['cerpen'] = $this->db->query("select * from cerpen where id_penulis = ".$_SESSION['id'])->result();
        if(!empty($_POST)){
            $check = ambilData('users',['id_user'=>$_SESSION['id']]);
            if($check->saldo<$_POST['total']){
                $this->session->set_flashdata('pesan','Saldo tidak cukup');
                redirect('penulis/history');
                exit();
            }
            $_POST['id_user'] = $_SESSION['id'];
            $_POST['id_editor'] = $id;
            $this->db->insert('pesananeditor',$_POST);

             $this->db->where('user_id',$_SESSION['id']);
            $this->db->set('saldo','saldo-'.$_POST['total'],FALSE);
            $this->db->update('penulis');
            $this->session->set_flashdata('pesan','Berhasil memesan.Jika editor tidak merespon maka dalam 3 hari uang dikembalikan');
            redirect('penulis/history');
        }
        $this->load->view('include/header.php');
        $this->load->view('penulis/pesaneditor',$data);
        $this->load->view('include/footer.php');
    }