我尝试使用CodeIgniter 3和PortPHP库将csv导入数据库。
https://github.com/portphp/portphp
这是我的函数输入：

function input_csv() {
// Create and configure the reader
$file = new \SplFileObject('input.csv');
$csvReader = new CsvReader($file);

// Tell the reader that the first row in the CSV file contains column headers
$csvReader->setHeaderRowNumber(0);

// Create the workflow from the reader
$workflow = new StepAggregator($csvReader);

// Create a writer: you need Doctrine’s EntityManager.
$doctrineWriter = new DoctrineWriter($entityManager, 'MyApp:Event');
$workflow->addWriter($doctrineWriter);

// Add a converter to the workflow that will convert `beginDate` and `endDate`
// to \DateTime objects
$dateTimeConverter = new DateTimeValueConverter('Ymd');
$converterStep = new ValueConverterStep();
$converterStep
    ->add('beginDate', $dateTimeConverter)
    ->add('endDate', $dateTimeConverter);
$workflow->addStep($converterStep);

// Process the workflow
$workflow->process();
  }

观

<form method="post" action="<?= site_url('home/read_csv') ?>">
                <div class="modal-footer">
                    <button class="btn btn-secondary" data-dismiss="modal">Close</button>
                    <button class="btn btn-primary">Submit</button>
                </div>
            </form>

我的数据库表有名称：表事务
1.我怎样才能确定这个应该输入到哪个表？
1.当我提交表单时，我得到：

Severity: Notice

Message: Undefined variable: entityManager

Filename: controllers/Home.php

Line Number: 55```

对于Q1，我有代码：

$spreadsheet = $reader->load($_FILES['uploadFile']['tmp_name']);
            $sheet_data  = $spreadsheet->getActiveSheet(0)->toArray();
            $array_data  = [];

            for($i = 1; $i < count($sheet_data); $i++) {
                $data = array(
                    'name'       => $sheet_data[$i]['0'],
                    'price'      => $sheet_data[$i]['1'],
                    'qty'        => $sheet_data[$i]['2'],
                    'input_date' => $sheet_data[$i]['3']
                );
                $array_data[] = $data;
            }
            
            if($array_data != '') {
                $this->home_model->insert_transaction_batch($array_data);
            }
            $this->modal_feedback('success', 'Success', 'Data Imported', 'OK');
        } else {
            $this->modal_feedback('error', 'Error', 'Import failed', 'Try again');
        }
        redirect('/');

但是有人能帮我实现上面的代码吗
@更新完整代码

function input_csv() {
// Create and configure the reader
$file = new \SplFileObject('input.csv');
$csvReader = new CsvReader($file);

// Tell the reader that the first row in the CSV file contains column headers
$csvReader->setHeaderRowNumber(0);

// Create the workflow from the reader
$workflow = new StepAggregator($csvReader);

// Create a writer: you need Doctrine’s EntityManager.
$doctrineWriter = new DoctrineWriter($entityManager, 'tbl_transaction');
$workflow->addWriter($doctrineWriter);

$this->load->library('doctrine');
$entityManager = $this->doctrine->em;

$csvReader = new CsvReader($file, $entityManager);

// Add a converter to the workflow that will convert `beginDate` and `endDate`
// to \DateTime objects
$dateTimeConverter = new DateTimeValueConverter('Ymd');
$converterStep = new ValueConverterStep();
$converterStep
    ->add('beginDate', $dateTimeConverter)
    ->add('endDate', $dateTimeConverter);
$workflow->addStep($converterStep);

$spreadsheet = $reader->load($_FILES['uploadFile']['tmp_name']);
$sheet_data  = $spreadsheet->getActiveSheet(0)->toArray();
$array_data  = [];

for($i = 1; $i < count($sheet_data); $i++) {
    $data = array(
        'name'       => $sheet_data[$i]['0'],
        'price'      => $sheet_data[$i]['1'],
        'qty'        => $sheet_data[$i]['2'],
        'input_date' => $sheet_data[$i]['3']
    );
    $array_data[] = $data;
}

if($array_data != '') {
    $this->home_model->insert_transaction_batch($array_data);
}
$this->modal_feedback('success', 'Success', 'Data Imported', 'OK');
} else {
    $this->modal_feedback('error', 'Error', 'Import failed', 'Try again');
}
redirect('/');

// Process the workflow
$workflow->process();
  }