调用CI 4中未定义的函数form_open()

Question

我使用CodeIgniter 4并以以下方式加载表单助手，但它仍然显示，

调用未定义的函数form_open((

在BaseController.php中，我正在自动加载表单帮助程序。

protected $helpers = ["form"];

路线：

$routes->get('admin/login', 'adminLoginController::index');

控制器：

public function index()
{
    
    echo view('admin/login');
}

视图：

<?php echo form_open('admin/dologin');?>
    <?= csrf_token() ?>
    <div class="input-group mb-3">
      <input type="email" class="form-control" name="email" placeholder="Email">
      <div class="input-group-append">
        <div class="input-group-text">
          <span class="fas fa-envelope"></span>
        </div>
      </div>
    </div>
    <div class="input-group mb-3">
      <input type="password" class="form-control" name="password" placeholder="Password">
      <div class="input-group-append">
        <div class="input-group-text">
          <span class="fas fa-lock"></span>
        </div>
      </div>
    </div>
    <div class="row">
      <div class="col-4">
        <button type="submit" class="btn btn-primary btn-block">Sign In</button>
      </div>
      <!-- /.col -->
    </div>
  <?php echo form_close();?>

我如何摆脱这个错误

Call to undefined function form_open()

Answer 1

加载此Helper

使用以下代码加载此帮助程序：

<blockquote\

<?php
helper('form');

>在您的app/Controllers/BaseController.php文件中，

<?php
namespace AppControllers;
// ...
class BaseController extends Controller
{
    public function initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger)
    {
        // Do Not Edit This Line
        parent::initController($request, $response, $logger);
        // Preload any models, libraries, etc, here.
        helper("form");
    }
}