php - 调用 CI 4 中未定义的函数 form_open()

Question

我正在使用 CodeIgniter 4 并按以下方式加载表单助手，但它仍然显示，

Call to undefined function form_open()

在 BaseController.php 中，我自动加载表单助手。

protected $helpers = ["form"];

路线:

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

Controller :

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

查看:

<?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();?>

我怎样才能摆脱这个错误？

Call to undefined function form_open()

Answer 1

Loading this Helper

This helper is loaded using the following code:

<?php

helper('form');

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

<?php

namespace App\Controllers;

// ...

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");
    }
}