php - 如何使用 Codeigniter 从数据库中创建动态导航菜单选择？

Question

我一直在尝试寻找使用 Codeigniter 在数据库中创建动态导航菜单存储的解决方案。但直到现在我都无法解决我的问题而且我真的不明白如何创建此功能我尝试创建以下代码但我只能显示没有子菜单的菜单。 正如在 View 中一样，我不仅可以选择菜单，还可以选择子菜单。我真的不明白如何为创建子菜单设置条件 因为我必须将 parent 与菜单 ID 进行比较，如果我发现 parent 等于菜单 ID 我将显示下拉当前菜单 但这对我来说是失败的

这是我的观点

<div class="navbar-collapse collapse">
    <ul class="nav navbar-nav">
       <li><a>some menu retrieve from DB </a></li>
           <li class="dropdown megamenu-fullwidth"> 
              <a data-toggle="dropdown" class="dropdown-toggle">title</a>
              <ul class="dropdown-menu"> 
                <li class="megamenu-content">
                 <ul class="col-lg-2 col-sm-2 col-md-2">
                   <li class="no-border"><p><strong>Head</strong></p></li>
                   <li><a href="#">Descript<br></a></li>
                 </ul> 
               </li> 
            </ul>
        </li>
       <?PHP endif; ?>
      <?PHP endforeach; ?>
 </ul>    
</div>

这是 Controller

$this->data['menus'] =  $this->nav_m->menus(); 

这是模型

 public function menus() {
        $this->db->select("*");
        $this->db->from("nav"); 
        $this->q = $this->db->get();
        if ($this->q->num_rows() > 0) {
           return $this->q->result_array();
        }
    }

这是我使用来自 DB 的 Var_dump() 的导航

array (size=7)
  0 => 
    array (size=9)
      'id' => string '1' (length=1)
      'uid' => string '0' (length=1)
      'text' => string 'title1' (length=6)
      'link' => string 'menus1' (length=6)
      'show_condition' => string '1' (length=1)
      'parent' => string '0' (length=1)
      'class' => string '' (length=0)
      'data' => string '' (length=0)
      'des' => string '' (length=0)
  1 => 
    array (size=9)
      'id' => string '2' (length=1)
      'uid' => string '0' (length=1)
      'text' => string 'title2' (length=6)
      'link' => string 'menus2' (length=6)
      'show_condition' => string '1' (length=1)
      'parent' => string '2' (length=1)
      'class' => string '1' (length=1)
      'data' => string '' (length=0)
      'des' => string '' (length=0)
  2 => 
    array (size=9)
      'id' => string '3' (length=1)
      'uid' => string '0' (length=1)
      'text' => string 'title3' (length=6)
      'link' => string 'menu3' (length=5)
      'show_condition' => string '1' (length=1)
      'parent' => string '2' (length=1)
      'class' => string '' (length=0)
      'data' => string '' (length=0)
      'des' => string '' (length=0)
  3 => 
    array (size=9)
      'id' => string '4' (length=1)
      'uid' => string '0' (length=1)
      'text' => string 'Sub1' (length=4)
      'link' => string 'menu4' (length=5)
      'show_condition' => string '1' (length=1)
      'parent' => string '2' (length=1)
      'class' => string '' (length=0)
      'data' => string '' (length=0)
      'des' => string '' (length=0)
  4 => 
    array (size=9)
      'id' => string '5' (length=1)
      'uid' => string '0' (length=1)
      'text' => string 'sub2' (length=4)
      'link' => string 'hhhhhhhhhhhh' (length=12)
      'show_condition' => string '1' (length=1)
      'parent' => string '2' (length=1)
      'class' => string '' (length=0)
      'data' => string '' (length=0)
      'des' => string '' (length=0)
  5 => 

请帮忙

Answer 1

您获得结果的方式太复杂而无法处理。我会将数据库中的子菜单项和父菜单项分开，然后构建一个数组，以便 View 可以更轻松地解析它。试试这个:

数据库:

然后你的模型:

function menus() {
    $this->db->select("*");
    $this->db->from("menu_parents");
    $q = $this->db->get();

    $final = array();
    if ($q->num_rows() > 0) {
        foreach ($q->result() as $row) {

            $this->db->select("*");
            $this->db->from("menu_children");
            $this->db->where("fk_parent_id", $row->parent_id);
            $q = $this->db->get();
            if ($q->num_rows() > 0) {
                $row->children = $q->result();
            }
            array_push($final, $row);
        }
    }
    return $final;
}

Controller :

public function get_menus() {
    $this->load->model('your_model');
    $menus = $this->your_model->menus();
    $data = array('menus' => $menus);
    $this->load->view('page1', $data);
}

查看:

<div class="navbar-collapse collapse">
    <ul class="nav navbar-nav">
        <?php foreach ($menus as $menu) { ?>
            <li><a><?= $menu->text ?></a></li>
            <?php
            if (isset($menu->children)) {
                foreach ($menu->children as $child) {
                    ?>
                    <li class="dropdown megamenu-fullwidth"> 
                        <a data-toggle="dropdown" class="dropdown-toggle" href="#"><</a>
                        <ul class="dropdown-menu"> 
                            <li class="megamenu-content">
                                <ul class="col-lg-2 col-sm-2 col-md-2">
                                    <li class="no-border"><p><strong>Head</strong></p></li>
                                    <li><a href="#">Descript<br></a></li>
                                </ul> 
                            </li> 
                        </ul>
                    </li>
                    <?php
                }
            }
            ?>
        <?php } ?>
    </ul>    
</div>