使用关联数组通过 PHP 和 CodeIgniter 传递数据库信息

Question

问题/问题：我正在使用 CodeIgniter 构建事件日历，并且包含了一个共享选项。此选项在基本级别有效，但仅在 <ul> 中显示用户 ID（主键）。这并不理想，我想在<ul> 中显示用户的名字和姓氏。我认为创建一个关联数组会起作用，但我收到了时髦的结果。当页面加载时，名字和姓氏会显示为“Array Array”，当您选择“Array Array”链接时，URL id 会显示为“Array”。我想知道我的逻辑有什么问题。

视图中生成的时髦链接：

Array Array

链接到“Array Array”的时髦 URL：

http://example.com/user/shared/view/Array

修改后的控制器：

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Shared extends Common_Auth_Controller {

    private $end_user;

    public function __construct()
    {
        parent::__construct();

        $this->end_user = $this->ion_auth->user()->row();
        $data['end_user'] = $this->end_user;
        $this->load->vars($data);

        $this->load->model('events_model', 'events');
    }

    public function index()
    {
        $title['title'] = 'Shared';

        $this->load->model('shared_model','shared');

        $data['sharers'][] = array(
                                'shared_owner_id' => $this->shared->get($this->end_user->id),
                                'owner_first_name' => $this->shared->get($this->end_user->first_name),
                                'owner_last_name' => $this->shared->get($this->end_user->last_name),
                                );

        $this->load->view('public/head_view', $title);
        $this->load->view('user/header_view');
        $this->load->view('user/shared_view', $data);
        $this->load->view('user/footer_view');
    }

修改后的视图：

<div class="hide-on-phones">
                <ul>
                    <?php foreach($sharers as $key => $value): ?>
                        <li><a href="<?php echo base_url('user/shared/view/'.$value['shared_owner_id']) ?>"><?php echo $value['owner_first_name']." ".$value['owner_last_name'] ?></a></li>
                    <?php endforeach; ?>
                </ul>
            </div>

型号：

class Shared_model extends crud_model {

    public function __construct()
    {
        parent::__construct();

        $this->pk = 'id';
        $this->table_name = 'shared';
    }

    public function get($shared_to_user_id)
    {
        $this->db->where('shared_to_id', $shared_to_user_id);
        $ids = parent::get_all();

        $users = array();

        foreach ($ids as $id)
        {

            $users[] = $id->owner_id;
        }

        return $users;
    }
}

非常感谢您的帮助，如果需要更多信息，请告诉我。下面是可以工作的原始视图和控制器，但不是可取的。

原控制人：

public function index()
    {

            $title['title'] = 'Shared';

            $this->load->model('shared_model','shared');

            $data['sharers'] = $this->shared->get($this->end_user->id);

            $this->load->view('user/head_view', $title);
            $this->load->view('user/header_view');
            $this->load->view('user/navigation_view');
            $this->load->view('user/shared_view', $data);
            $this->load->view('user/footer_view');
    }

原图：

<?php foreach($sharers as $s): ?>
    <li><a href="<?php echo base_url('user/shared/mobile/'.$s) ?>"><?php echo $s ?></a></li>
<?php endforeach; ?>

免责声明：我是 Web 开发的新手，我不擅长关联数组（显然）。

Answer 1

您的$data['sharers'] 数组没有$values 那样的数组。因此，您在 foreach 中调用 $value[]'s 的方式不起作用。此时您没有理由致电foreach。

<div class="hide-on-phones">
  <ul>
    <li><a href="<?=base_url('user/shared/view/'.$sharers['shared_pk_id'])?>">
           <?=$sharers['first_name'] . ' ' . $sharers['last_name']?>
        </a>
    </li>
  </ul>
</div>

我希望你稍后会用数据填充一个数组，在这种情况下你可以将它填充为

$data['sharers'][] = array( 
                            'shared_pk' => $this->shared->get($this->end_user->id),
                            'first_name' => $this->events->get($this->end_user->first_name),
                            'last_name' => $this->events->get($this->end_user->last_name)
                            );

这又可以循环使用

<div class="hide-on-phones">
  <ul>
    <? foreach($sharers as $sharer): ?>
    <li>
      <a href="<?=base_url('user/shared/view/' . $sharer['shared_pk'])?>">
        <?=$sharer['first_name'] . ' ' . $sharer['last_name']?>
      </a>
    </li>
    <? endforeach; ?>
  </ul>
</div>

Answer 2

如果我们获取您的$data['sharers'] 数组并为 php 输入值，那么我们会得到这样的结果：

$data['sharers'] = array(
  0 => array(
    'id' => 1234,
    'first_name' => 'John',
    'last_name' => 'Doe'
  ),
  1 => array(
    'id' => 1235,
    'first_name' => 'Jane',
    'last_name' => 'Doe'
  )
);

因此，当您在视图中循环访问这些内容时，您需要正确访问这些内容：

foreach($sharers as $key => $value):
    // at this point, in the first iteration of the loop
    // $key is 'id', or 'first_name', or 'last_name'
    // and $value is 1234, or 'John', or 'Doe'
endforeach;

因此，要更轻松地循环遍历共享者，您只需稍微更新一下 foreach。此时，将您的视图更改为：

<div class="hide-on-phones">
  <ul>
    <?php foreach($sharers as $sharer): ?>
      <li>
        <a href="<?php echo base_url('user/shared/view/'.$sharer['shared_pk_id']) ?>">
          <?php echo $sharer['first_name']. " " .$sharer['last_name'] ?>
        </a>
      </li>
    <?php endforeach; ?>
  </ul>
</div>

Answer 3

我想通了。我需要在我的模型中创建一个关联数组；不是我的控制器。感谢大家的帮助！

型号：

class Shares_model extends crud_model {

    public function __construct()
    {
        parent::__construct();

        $this->pk = 'id';
        $this->table_name = 'shares';
    }

    public function get($shared_to_user_id)
    {
        $this->db->where('shared_to_id', $shared_to_user_id);
        $ids = parent::get_all();

        $users = array();

        foreach ($ids as $id)
        {
            $users[$id->owner_id]['owner_id'] = $id->owner_id;
            $users[$id->owner_id]['owner_first_name'] = $id->owner_first_name;
            $users[$id->owner_id]['owner_last_name'] = $id->owner_last_name;
        }

        return $users;
    }   
}

查看：

<ul>
    <?php foreach($sharers as $s): ?>
        <li><a href="<?php echo base_url('user/shared/view/'.$s['owner_id']) ?>"><?php echo $s['owner_first_name']." ".$s['owner_last_name'] ?></a></li>
    <?php endforeach; ?>
</ul>

控制器：

public function index()
    {
        $title['title'] = 'Shared';

        $this->load->model('shares_model','shares');

        $data['sharers'] = $this->shares->get($this->end_user->id);

        $this->load->view('public/head_view', $title);
        $this->load->view('user/header_view');
        $this->load->view('user/shared_view', $data);
        $this->load->view('user/footer_view');
    }