无法将变量从控制器传递到模型以处理codeigniter中的多个上载字段

Posted 2021-05-06

我在表单中有三个文件输入（每个都有不同的名称：self_pic，passport_pic和sic_pic）。在处理输入的控制器中，我为每个不同的变量分配了上传图像的三个名称，并将变量传递给我已经在模型中定义的函数，这样我就可以在db中保存包含上传图像名称的变量。它适用于两个变量，而不适用于一个变量。我不断得到变量未定义的错误。

这是我在控制器中的代码

                $config['upload_path'] = './asset/image/participant_img';
                $config['allowed_types'] = 'gif|jpg|jpeg|png';
                $config['max_size'] = '2048';

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

                if(!$this->upload->do_upload('self_pic')){
                    $errors = array('error' => $this->upload->display_errors());
                    $this->load->view('reg_participant', $errors);
                } else {
                    $data = array('upload_data' => $this->upload->data());
                    $self_pic = $_FILES['self_pic']['name'];
                }

                if(!$this->upload->do_upload('passport_pic')){
                    $errors = array('error' => $this->upload->display_errors());
                    $this->load->view('reg_participant', $errors);
                } else {
                    $data = array('upload_data' => $this->upload->data());
                    $passport_pic = $_FILES['passport_pic']['name'];
                }

                if(!$this->upload->do_upload('sic_pic')){
                    $errors = array('error' => $this->upload->display_errors());
                    $this->load->view('reg_participant', $errors);
                } else {
                    $data = array('upload_data' => $this->upload->data());
                    $sic_pic = $_FILES['sic_pic']['name'];
                }
                $pictures = array ('self_pic' => $self_pic, 'passport_pic' => $passport_pic, 'sic_pic' => $sic_pic);

                $this->reg_model->simpan($pictures);
                redirect('/registrations_participant', 'refresh');

错误：

the error that i get

而且我觉得写一堆if是脏的，我试着把它们写成循环，但我找不到怎么做。任何的想法？或任何建议如何正确地写它们。谢谢！

答案

我的猜测是该字段为空，因为文件太大（因此没有上传），上传字段名称不正确，或者发生错误并且变量永远不会被设置（您在重定向时看不到）。尝试以下代码（还集成了foreach并删除所有错误的文件以防止孤立）。

$config['upload_path'] = './asset/image/participant_img';
$config['allowed_types'] = 'gif|jpg|jpeg|png';
$config['max_size'] = '2048';

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

$upload_fields = array('self_pic', 'sic_pic', 'passport_pic');

$uploaded_files = array();

$error_flag = false;

foreach ($upload_fields as $field_name) {
    if (!$this->upload->do_upload($field_name)) {
        $errors = array('error' => $this->upload->display_errors());
        // delete files on failure as when the user reuploads to fix
        // whatever error occurs we don't have duplicates!
        if (count($uploaded_files) > 0) {
            foreach ($uploaded_files as $file) {
                @unlink($file);
            }
        }
        $error_flag = true;
        $this->load->view('reg_participant', $errors);
        break; // stop everything...
    } else {
        $uploaded_files[] = $this->upload->data('full_path');
        $data[$field_name] = $this->upload->data('file_name');
    }
}

// an error occured, don't redirect as then we won't see our error message
// from above view
if (!$error_flag) {
    $this->reg_model->simpan($data);
    redirect('/registrations_participant', 'refresh');
}