关于php：Codeigniter上传不允许的文件不产生错误

    $config[‘upload_path’] = ‘./profile_img/’;
    $config[‘allowed_types’] = ‘gif|jpg|png’;
    $config[‘max_size’] = ‘100’;
    $config[‘max_width’]  = ‘1024’;
    $config[‘max_height’]  = ‘768’;

    $this->load->library(‘upload’, $config);

    if(isset($_FILES[‘userfile’]) && $_FILES[‘userfile’][‘size’] > 0){  
        if ( ! $this->upload->do_upload(‘userfile’))
        {
                $error = $this->upload->display_errors();
                $this->session->set_userdata("message", $error);
                header("Location: /page/account");
        }
        else
        {
                $upload_data = $this->upload->data();
                $photo = $upload_data[‘file_name’];
        }
    }

    $data = array(
        ‘first_name’ => $this->input->post("first_name"),
        ‘last_name’ => $this->input->post("last_name"),
        ‘username’ => $this->input->post("username"),
        ‘default_meeting_duration’ => $this->input->post("default_meeting_duration"),
        ‘notification_type’ => $this->input->post("notification_type"),
        ‘photo’ => $photo
    );

    $this->user_model->update($data, $this->ion_auth->get_user_id());
    $this->session->set_userdata("message","Account Settings Saved");
    header("Location: /page/account");