PHP/CodeIgniter关系数据库数组构建

解决了！最终答案位于该问题的底部

我正在尝试使用CodeIgniter制作一个菜单生成器，出于某种原因，我似乎无法理解这个概念，即使它看起来很简单（我对PHP和CI还不熟悉）。这与CodeIgniter本身没有太大关系，因为我只在查询和MVC模式中使用它

我有两张桌子：

• 菜单：

  array(  
      [0] => array(
          [menu_id]    => 1,
          [menu_name]  => 'Menu 1',
          [menu_pages] => array(
              [0] => array(
                  [id]         => 1,
                  [page_id]    => 1,
                  [menu_id]    => 1,
                  [item_name]  => 'Home',
                  [item_order] => 0,
                  [item_level] => 0,
                  [parent_id]  => ''
              ),
              [1] => array(
                  [id]         => 2,
                  [page_id]    => 2,
                  [menu_id]    => 1,
                  [item_name]  => 'About',
                  [item_order] => 0,
                  [item_level] => 0,
                  [parent_id]  => ''
              )
          )
      ),
      [1] => array(
          [menu_id]    => 2,
          [menu_name]  => 'Menu 2',
          [menu_pages] => array(
              [0] => array(
                  [id]         => 3,
                  [page_id]    => 3,
                  [menu_id]    => 2,
                  [item_name]  => 'Services',
                  [item_order] => 0,
                  [item_level] => 0,
                  [parent_id]  => ''
              ),
              [1] => array(
                  [id]         => 4,
                  [page_id]    => 4,
                  [menu_id]    => 2,
                  [item_name]  => 'Contact',
                  [item_order] => 0,
                  [item_level] => 0,
                  [parent_id]  => ''
              )
          )
      )
  )
  

  function GetMenus() {
      $menus    = $this->db->get('menus');
      $menucols = $this->db->list_fields('menus');
  
      $pages    = $this->db->get('menu_pages');
      $pagecols = $this->db->list_fields('menu_pages');
  
      $arr      = array();
      $i        = 0;
  
      foreach($menus->result() as $menu) {
          foreach($pages->result() as $page) {
              foreach($pagecols as $col) {
                  $arr[$i][$col] = $page->$col;
              }
  
              foreach($menucols as $cols) {
                  $this->menus[$i][$cols] = $menu->$cols;
  
                  if($arr[$i]['menu_id'] === $menu->id) {
                      $this->menus[$i]['menu_pages'] = $arr[$i];
                  }
              }
          }
  
          $i++;
      }
  
      return $this->menus;
  }
  

  Array(
      [0] => Array(
          [id] => 1,
          [name] => default,
          [menu_pages] => Array(
              Array( /* missing #1, showing #2/2 */
                  [id] => 2
                  [page_id] => 1
                  [menu_id] => 1
                  [item_name] => About
                  [item_order] => 0
                  [item_level] => 0
                  [parent_id] => 
              )
          )
      ),
      [1] => Array(
          [id] => 2,
          [name] => menu2,
          [menu_pages] => Array(
              Array( /* missing #3, showing #4/4 */
                  [id] => 4
                  [page_id] => 3
                  [menu_id] => 2
                  [item_name] => Contact
                  [item_order] => 0
                  [item_level] => 0
                  [parent_id] => 
              )
          )
      )
  )
  

  function GetMenus() {
      /* Yes, I know these can be chained, I unchained them to avoid
         horizontal scrolling on SO */
      $this->db->select('menus.name, menu_pages.*, pages.slug');
      $this->db->join('menu_pages', 'menu_pages.menu_id = menus.id');
      $this->db->join('pages', 'pages.id = menu_pages.page_id');
      $this->db->order_by('item_order', 'ASC');
      $menus  = $this->db->get('menus');
      $result = array();
  
      foreach($menus->result() as $menu) {
          $result[$menu->name][$menu->id] = array(
              'page_id'    => $menu->page_id,
              'menu_id'    => $menu->menu_id,
              'item_name'  => $menu->item_name,
              'item_slug'  => $menu->slug,
              'item_order' => $menu->item_order,
              'item_level' => $menu->item_level,
              'parent_id'  => $menu->parent_id
          );
      }
  
      return $result;
  }
  

  $this->menu = $this->page->GetMenus();
  

  <ul class="nav">
      <?php foreach($this->menu['default'] as $item) { ?>
          <li>
              <a href="<?php echo $item['item_slug']; ?>">
                  <?php echo $item['item_name']; ?>
              </a>
          </li>
      <?php } ?>
  </ul>
  

  • 身份证
  • 名字
• 菜单页面：

  array(  
      [0] => array(
          [menu_id]    => 1,
          [menu_name]  => 'Menu 1',
          [menu_pages] => array(
              [0] => array(
                  [id]         => 1,
                  [page_id]    => 1,
                  [menu_id]    => 1,
                  [item_name]  => 'Home',
                  [item_order] => 0,
                  [item_level] => 0,
                  [parent_id]  => ''
              ),
              [1] => array(
                  [id]         => 2,
                  [page_id]    => 2,
                  [menu_id]    => 1,
                  [item_name]  => 'About',
                  [item_order] => 0,
                  [item_level] => 0,
                  [parent_id]  => ''
              )
          )
      ),
      [1] => array(
          [menu_id]    => 2,
          [menu_name]  => 'Menu 2',
          [menu_pages] => array(
              [0] => array(
                  [id]         => 3,
                  [page_id]    => 3,
                  [menu_id]    => 2,
                  [item_name]  => 'Services',
                  [item_order] => 0,
                  [item_level] => 0,
                  [parent_id]  => ''
              ),
              [1] => array(
                  [id]         => 4,
                  [page_id]    => 4,
                  [menu_id]    => 2,
                  [item_name]  => 'Contact',
                  [item_order] => 0,
                  [item_level] => 0,
                  [parent_id]  => ''
              )
          )
      )
  )
  

  function GetMenus() {
      $menus    = $this->db->get('menus');
      $menucols = $this->db->list_fields('menus');
  
      $pages    = $this->db->get('menu_pages');
      $pagecols = $this->db->list_fields('menu_pages');
  
      $arr      = array();
      $i        = 0;
  
      foreach($menus->result() as $menu) {
          foreach($pages->result() as $page) {
              foreach($pagecols as $col) {
                  $arr[$i][$col] = $page->$col;
              }
  
              foreach($menucols as $cols) {
                  $this->menus[$i][$cols] = $menu->$cols;
  
                  if($arr[$i]['menu_id'] === $menu->id) {
                      $this->menus[$i]['menu_pages'] = $arr[$i];
                  }
              }
          }
  
          $i++;
      }
  
      return $this->menus;
  }
  

  Array(
      [0] => Array(
          [id] => 1,
          [name] => default,
          [menu_pages] => Array(
              Array( /* missing #1, showing #2/2 */
                  [id] => 2
                  [page_id] => 1
                  [menu_id] => 1
                  [item_name] => About
                  [item_order] => 0
                  [item_level] => 0
                  [parent_id] => 
              )
          )
      ),
      [1] => Array(
          [id] => 2,
          [name] => menu2,
          [menu_pages] => Array(
              Array( /* missing #3, showing #4/4 */
                  [id] => 4
                  [page_id] => 3
                  [menu_id] => 2
                  [item_name] => Contact
                  [item_order] => 0
                  [item_level] => 0
                  [parent_id] => 
              )
          )
      )
  )
  

  function GetMenus() {
      /* Yes, I know these can be chained, I unchained them to avoid
         horizontal scrolling on SO */
      $this->db->select('menus.name, menu_pages.*, pages.slug');
      $this->db->join('menu_pages', 'menu_pages.menu_id = menus.id');
      $this->db->join('pages', 'pages.id = menu_pages.page_id');
      $this->db->order_by('item_order', 'ASC');
      $menus  = $this->db->get('menus');
      $result = array();
  
      foreach($menus->result() as $menu) {
          $result[$menu->name][$menu->id] = array(
              'page_id'    => $menu->page_id,
              'menu_id'    => $menu->menu_id,
              'item_name'  => $menu->item_name,
              'item_slug'  => $menu->slug,
              'item_order' => $menu->item_order,
              'item_level' => $menu->item_level,
              'parent_id'  => $menu->parent_id
          );
      }
  
      return $result;
  }
  

  $this->menu = $this->page->GetMenus();
  

  <ul class="nav">
      <?php foreach($this->menu['default'] as $item) { ?>
          <li>
              <a href="<?php echo $item['item_slug']; ?>">
                  <?php echo $item['item_name']; ?>
              </a>
          </li>
      <?php } ?>
  </ul>
  

  • 身份证
  • 页面id（与pages.id相关）
  • 菜单id（与menus.id相关）
  • 项目名称（它在菜单中的显示方式）
  • 项目订单（用于分拣）
  • 项目\父项（用于在子菜单中嵌套项目）

编辑：这是我希望实现的结构：

array(  
    [0] => array(
        [menu_id]    => 1,
        [menu_name]  => 'Menu 1',
        [menu_pages] => array(
            [0] => array(
                [id]         => 1,
                [page_id]    => 1,
                [menu_id]    => 1,
                [item_name]  => 'Home',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 2,
                [page_id]    => 2,
                [menu_id]    => 1,
                [item_name]  => 'About',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    ),
    [1] => array(
        [menu_id]    => 2,
        [menu_name]  => 'Menu 2',
        [menu_pages] => array(
            [0] => array(
                [id]         => 3,
                [page_id]    => 3,
                [menu_id]    => 2,
                [item_name]  => 'Services',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 4,
                [page_id]    => 4,
                [menu_id]    => 2,
                [item_name]  => 'Contact',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    )
)

function GetMenus() {
    $menus    = $this->db->get('menus');
    $menucols = $this->db->list_fields('menus');

    $pages    = $this->db->get('menu_pages');
    $pagecols = $this->db->list_fields('menu_pages');

    $arr      = array();
    $i        = 0;

    foreach($menus->result() as $menu) {
        foreach($pages->result() as $page) {
            foreach($pagecols as $col) {
                $arr[$i][$col] = $page->$col;
            }

            foreach($menucols as $cols) {
                $this->menus[$i][$cols] = $menu->$cols;

                if($arr[$i]['menu_id'] === $menu->id) {
                    $this->menus[$i]['menu_pages'] = $arr[$i];
                }
            }
        }

        $i++;
    }

    return $this->menus;
}

Array(
    [0] => Array(
        [id] => 1,
        [name] => default,
        [menu_pages] => Array(
            Array( /* missing #1, showing #2/2 */
                [id] => 2
                [page_id] => 1
                [menu_id] => 1
                [item_name] => About
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    ),
    [1] => Array(
        [id] => 2,
        [name] => menu2,
        [menu_pages] => Array(
            Array( /* missing #3, showing #4/4 */
                [id] => 4
                [page_id] => 3
                [menu_id] => 2
                [item_name] => Contact
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    )
)

function GetMenus() {
    /* Yes, I know these can be chained, I unchained them to avoid
       horizontal scrolling on SO */
    $this->db->select('menus.name, menu_pages.*, pages.slug');
    $this->db->join('menu_pages', 'menu_pages.menu_id = menus.id');
    $this->db->join('pages', 'pages.id = menu_pages.page_id');
    $this->db->order_by('item_order', 'ASC');
    $menus  = $this->db->get('menus');
    $result = array();

    foreach($menus->result() as $menu) {
        $result[$menu->name][$menu->id] = array(
            'page_id'    => $menu->page_id,
            'menu_id'    => $menu->menu_id,
            'item_name'  => $menu->item_name,
            'item_slug'  => $menu->slug,
            'item_order' => $menu->item_order,
            'item_level' => $menu->item_level,
            'parent_id'  => $menu->parent_id
        );
    }

    return $result;
}

$this->menu = $this->page->GetMenus();

<ul class="nav">
    <?php foreach($this->menu['default'] as $item) { ?>
        <li>
            <a href="<?php echo $item['item_slug']; ?>">
                <?php echo $item['item_name']; ?>
            </a>
        </li>
    <?php } ?>
</ul>

以下是我到目前为止得到的信息（更新）：

array(  
    [0] => array(
        [menu_id]    => 1,
        [menu_name]  => 'Menu 1',
        [menu_pages] => array(
            [0] => array(
                [id]         => 1,
                [page_id]    => 1,
                [menu_id]    => 1,
                [item_name]  => 'Home',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 2,
                [page_id]    => 2,
                [menu_id]    => 1,
                [item_name]  => 'About',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    ),
    [1] => array(
        [menu_id]    => 2,
        [menu_name]  => 'Menu 2',
        [menu_pages] => array(
            [0] => array(
                [id]         => 3,
                [page_id]    => 3,
                [menu_id]    => 2,
                [item_name]  => 'Services',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 4,
                [page_id]    => 4,
                [menu_id]    => 2,
                [item_name]  => 'Contact',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    )
)

function GetMenus() {
    $menus    = $this->db->get('menus');
    $menucols = $this->db->list_fields('menus');

    $pages    = $this->db->get('menu_pages');
    $pagecols = $this->db->list_fields('menu_pages');

    $arr      = array();
    $i        = 0;

    foreach($menus->result() as $menu) {
        foreach($pages->result() as $page) {
            foreach($pagecols as $col) {
                $arr[$i][$col] = $page->$col;
            }

            foreach($menucols as $cols) {
                $this->menus[$i][$cols] = $menu->$cols;

                if($arr[$i]['menu_id'] === $menu->id) {
                    $this->menus[$i]['menu_pages'] = $arr[$i];
                }
            }
        }

        $i++;
    }

    return $this->menus;
}

Array(
    [0] => Array(
        [id] => 1,
        [name] => default,
        [menu_pages] => Array(
            Array( /* missing #1, showing #2/2 */
                [id] => 2
                [page_id] => 1
                [menu_id] => 1
                [item_name] => About
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    ),
    [1] => Array(
        [id] => 2,
        [name] => menu2,
        [menu_pages] => Array(
            Array( /* missing #3, showing #4/4 */
                [id] => 4
                [page_id] => 3
                [menu_id] => 2
                [item_name] => Contact
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    )
)

function GetMenus() {
    /* Yes, I know these can be chained, I unchained them to avoid
       horizontal scrolling on SO */
    $this->db->select('menus.name, menu_pages.*, pages.slug');
    $this->db->join('menu_pages', 'menu_pages.menu_id = menus.id');
    $this->db->join('pages', 'pages.id = menu_pages.page_id');
    $this->db->order_by('item_order', 'ASC');
    $menus  = $this->db->get('menus');
    $result = array();

    foreach($menus->result() as $menu) {
        $result[$menu->name][$menu->id] = array(
            'page_id'    => $menu->page_id,
            'menu_id'    => $menu->menu_id,
            'item_name'  => $menu->item_name,
            'item_slug'  => $menu->slug,
            'item_order' => $menu->item_order,
            'item_level' => $menu->item_level,
            'parent_id'  => $menu->parent_id
        );
    }

    return $result;
}

$this->menu = $this->page->GetMenus();

<ul class="nav">
    <?php foreach($this->menu['default'] as $item) { ?>
        <li>
            <a href="<?php echo $item['item_slug']; ?>">
                <?php echo $item['item_name']; ?>
            </a>
        </li>
    <?php } ?>
</ul>

以上实际输出：

array(  
    [0] => array(
        [menu_id]    => 1,
        [menu_name]  => 'Menu 1',
        [menu_pages] => array(
            [0] => array(
                [id]         => 1,
                [page_id]    => 1,
                [menu_id]    => 1,
                [item_name]  => 'Home',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 2,
                [page_id]    => 2,
                [menu_id]    => 1,
                [item_name]  => 'About',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    ),
    [1] => array(
        [menu_id]    => 2,
        [menu_name]  => 'Menu 2',
        [menu_pages] => array(
            [0] => array(
                [id]         => 3,
                [page_id]    => 3,
                [menu_id]    => 2,
                [item_name]  => 'Services',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 4,
                [page_id]    => 4,
                [menu_id]    => 2,
                [item_name]  => 'Contact',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    )
)

function GetMenus() {
    $menus    = $this->db->get('menus');
    $menucols = $this->db->list_fields('menus');

    $pages    = $this->db->get('menu_pages');
    $pagecols = $this->db->list_fields('menu_pages');

    $arr      = array();
    $i        = 0;

    foreach($menus->result() as $menu) {
        foreach($pages->result() as $page) {
            foreach($pagecols as $col) {
                $arr[$i][$col] = $page->$col;
            }

            foreach($menucols as $cols) {
                $this->menus[$i][$cols] = $menu->$cols;

                if($arr[$i]['menu_id'] === $menu->id) {
                    $this->menus[$i]['menu_pages'] = $arr[$i];
                }
            }
        }

        $i++;
    }

    return $this->menus;
}

Array(
    [0] => Array(
        [id] => 1,
        [name] => default,
        [menu_pages] => Array(
            Array( /* missing #1, showing #2/2 */
                [id] => 2
                [page_id] => 1
                [menu_id] => 1
                [item_name] => About
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    ),
    [1] => Array(
        [id] => 2,
        [name] => menu2,
        [menu_pages] => Array(
            Array( /* missing #3, showing #4/4 */
                [id] => 4
                [page_id] => 3
                [menu_id] => 2
                [item_name] => Contact
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    )
)

function GetMenus() {
    /* Yes, I know these can be chained, I unchained them to avoid
       horizontal scrolling on SO */
    $this->db->select('menus.name, menu_pages.*, pages.slug');
    $this->db->join('menu_pages', 'menu_pages.menu_id = menus.id');
    $this->db->join('pages', 'pages.id = menu_pages.page_id');
    $this->db->order_by('item_order', 'ASC');
    $menus  = $this->db->get('menus');
    $result = array();

    foreach($menus->result() as $menu) {
        $result[$menu->name][$menu->id] = array(
            'page_id'    => $menu->page_id,
            'menu_id'    => $menu->menu_id,
            'item_name'  => $menu->item_name,
            'item_slug'  => $menu->slug,
            'item_order' => $menu->item_order,
            'item_level' => $menu->item_level,
            'parent_id'  => $menu->parent_id
        );
    }

    return $result;
}

$this->menu = $this->page->GetMenus();

<ul class="nav">
    <?php foreach($this->menu['default'] as $item) { ?>
        <li>
            <a href="<?php echo $item['item_slug']; ?>">
                <?php echo $item['item_name']; ?>
            </a>
        </li>
    <?php } ?>
</ul>

正如您所看到的，这与我所需要的非常接近，但是缺少了一些项，因为它们似乎在数组中被覆盖（它只显示每个菜单的最后一个菜单项-似乎它们具有相同的键）

谢谢你的帮助和建议

编辑：这是最终的解决方案，大致基于米沙的答案：

array(  
    [0] => array(
        [menu_id]    => 1,
        [menu_name]  => 'Menu 1',
        [menu_pages] => array(
            [0] => array(
                [id]         => 1,
                [page_id]    => 1,
                [menu_id]    => 1,
                [item_name]  => 'Home',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 2,
                [page_id]    => 2,
                [menu_id]    => 1,
                [item_name]  => 'About',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    ),
    [1] => array(
        [menu_id]    => 2,
        [menu_name]  => 'Menu 2',
        [menu_pages] => array(
            [0] => array(
                [id]         => 3,
                [page_id]    => 3,
                [menu_id]    => 2,
                [item_name]  => 'Services',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 4,
                [page_id]    => 4,
                [menu_id]    => 2,
                [item_name]  => 'Contact',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    )
)

function GetMenus() {
    $menus    = $this->db->get('menus');
    $menucols = $this->db->list_fields('menus');

    $pages    = $this->db->get('menu_pages');
    $pagecols = $this->db->list_fields('menu_pages');

    $arr      = array();
    $i        = 0;

    foreach($menus->result() as $menu) {
        foreach($pages->result() as $page) {
            foreach($pagecols as $col) {
                $arr[$i][$col] = $page->$col;
            }

            foreach($menucols as $cols) {
                $this->menus[$i][$cols] = $menu->$cols;

                if($arr[$i]['menu_id'] === $menu->id) {
                    $this->menus[$i]['menu_pages'] = $arr[$i];
                }
            }
        }

        $i++;
    }

    return $this->menus;
}

Array(
    [0] => Array(
        [id] => 1,
        [name] => default,
        [menu_pages] => Array(
            Array( /* missing #1, showing #2/2 */
                [id] => 2
                [page_id] => 1
                [menu_id] => 1
                [item_name] => About
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    ),
    [1] => Array(
        [id] => 2,
        [name] => menu2,
        [menu_pages] => Array(
            Array( /* missing #3, showing #4/4 */
                [id] => 4
                [page_id] => 3
                [menu_id] => 2
                [item_name] => Contact
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    )
)

function GetMenus() {
    /* Yes, I know these can be chained, I unchained them to avoid
       horizontal scrolling on SO */
    $this->db->select('menus.name, menu_pages.*, pages.slug');
    $this->db->join('menu_pages', 'menu_pages.menu_id = menus.id');
    $this->db->join('pages', 'pages.id = menu_pages.page_id');
    $this->db->order_by('item_order', 'ASC');
    $menus  = $this->db->get('menus');
    $result = array();

    foreach($menus->result() as $menu) {
        $result[$menu->name][$menu->id] = array(
            'page_id'    => $menu->page_id,
            'menu_id'    => $menu->menu_id,
            'item_name'  => $menu->item_name,
            'item_slug'  => $menu->slug,
            'item_order' => $menu->item_order,
            'item_level' => $menu->item_level,
            'parent_id'  => $menu->parent_id
        );
    }

    return $result;
}

$this->menu = $this->page->GetMenus();

<ul class="nav">
    <?php foreach($this->menu['default'] as $item) { ?>
        <li>
            <a href="<?php echo $item['item_slug']; ?>">
                <?php echo $item['item_name']; ?>
            </a>
        </li>
    <?php } ?>
</ul>

型号：

array(  
    [0] => array(
        [menu_id]    => 1,
        [menu_name]  => 'Menu 1',
        [menu_pages] => array(
            [0] => array(
                [id]         => 1,
                [page_id]    => 1,
                [menu_id]    => 1,
                [item_name]  => 'Home',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 2,
                [page_id]    => 2,
                [menu_id]    => 1,
                [item_name]  => 'About',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    ),
    [1] => array(
        [menu_id]    => 2,
        [menu_name]  => 'Menu 2',
        [menu_pages] => array(
            [0] => array(
                [id]         => 3,
                [page_id]    => 3,
                [menu_id]    => 2,
                [item_name]  => 'Services',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 4,
                [page_id]    => 4,
                [menu_id]    => 2,
                [item_name]  => 'Contact',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    )
)

function GetMenus() {
    $menus    = $this->db->get('menus');
    $menucols = $this->db->list_fields('menus');

    $pages    = $this->db->get('menu_pages');
    $pagecols = $this->db->list_fields('menu_pages');

    $arr      = array();
    $i        = 0;

    foreach($menus->result() as $menu) {
        foreach($pages->result() as $page) {
            foreach($pagecols as $col) {
                $arr[$i][$col] = $page->$col;
            }

            foreach($menucols as $cols) {
                $this->menus[$i][$cols] = $menu->$cols;

                if($arr[$i]['menu_id'] === $menu->id) {
                    $this->menus[$i]['menu_pages'] = $arr[$i];
                }
            }
        }

        $i++;
    }

    return $this->menus;
}

Array(
    [0] => Array(
        [id] => 1,
        [name] => default,
        [menu_pages] => Array(
            Array( /* missing #1, showing #2/2 */
                [id] => 2
                [page_id] => 1
                [menu_id] => 1
                [item_name] => About
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    ),
    [1] => Array(
        [id] => 2,
        [name] => menu2,
        [menu_pages] => Array(
            Array( /* missing #3, showing #4/4 */
                [id] => 4
                [page_id] => 3
                [menu_id] => 2
                [item_name] => Contact
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    )
)

function GetMenus() {
    /* Yes, I know these can be chained, I unchained them to avoid
       horizontal scrolling on SO */
    $this->db->select('menus.name, menu_pages.*, pages.slug');
    $this->db->join('menu_pages', 'menu_pages.menu_id = menus.id');
    $this->db->join('pages', 'pages.id = menu_pages.page_id');
    $this->db->order_by('item_order', 'ASC');
    $menus  = $this->db->get('menus');
    $result = array();

    foreach($menus->result() as $menu) {
        $result[$menu->name][$menu->id] = array(
            'page_id'    => $menu->page_id,
            'menu_id'    => $menu->menu_id,
            'item_name'  => $menu->item_name,
            'item_slug'  => $menu->slug,
            'item_order' => $menu->item_order,
            'item_level' => $menu->item_level,
            'parent_id'  => $menu->parent_id
        );
    }

    return $result;
}

$this->menu = $this->page->GetMenus();

<ul class="nav">
    <?php foreach($this->menu['default'] as $item) { ?>
        <li>
            <a href="<?php echo $item['item_slug']; ?>">
                <?php echo $item['item_name']; ?>
            </a>
        </li>
    <?php } ?>
</ul>

控制器：

array(  
    [0] => array(
        [menu_id]    => 1,
        [menu_name]  => 'Menu 1',
        [menu_pages] => array(
            [0] => array(
                [id]         => 1,
                [page_id]    => 1,
                [menu_id]    => 1,
                [item_name]  => 'Home',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 2,
                [page_id]    => 2,
                [menu_id]    => 1,
                [item_name]  => 'About',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    ),
    [1] => array(
        [menu_id]    => 2,
        [menu_name]  => 'Menu 2',
        [menu_pages] => array(
            [0] => array(
                [id]         => 3,
                [page_id]    => 3,
                [menu_id]    => 2,
                [item_name]  => 'Services',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 4,
                [page_id]    => 4,
                [menu_id]    => 2,
                [item_name]  => 'Contact',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    )
)

function GetMenus() {
    $menus    = $this->db->get('menus');
    $menucols = $this->db->list_fields('menus');

    $pages    = $this->db->get('menu_pages');
    $pagecols = $this->db->list_fields('menu_pages');

    $arr      = array();
    $i        = 0;

    foreach($menus->result() as $menu) {
        foreach($pages->result() as $page) {
            foreach($pagecols as $col) {
                $arr[$i][$col] = $page->$col;
            }

            foreach($menucols as $cols) {
                $this->menus[$i][$cols] = $menu->$cols;

                if($arr[$i]['menu_id'] === $menu->id) {
                    $this->menus[$i]['menu_pages'] = $arr[$i];
                }
            }
        }

        $i++;
    }

    return $this->menus;
}

Array(
    [0] => Array(
        [id] => 1,
        [name] => default,
        [menu_pages] => Array(
            Array( /* missing #1, showing #2/2 */
                [id] => 2
                [page_id] => 1
                [menu_id] => 1
                [item_name] => About
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    ),
    [1] => Array(
        [id] => 2,
        [name] => menu2,
        [menu_pages] => Array(
            Array( /* missing #3, showing #4/4 */
                [id] => 4
                [page_id] => 3
                [menu_id] => 2
                [item_name] => Contact
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    )
)

function GetMenus() {
    /* Yes, I know these can be chained, I unchained them to avoid
       horizontal scrolling on SO */
    $this->db->select('menus.name, menu_pages.*, pages.slug');
    $this->db->join('menu_pages', 'menu_pages.menu_id = menus.id');
    $this->db->join('pages', 'pages.id = menu_pages.page_id');
    $this->db->order_by('item_order', 'ASC');
    $menus  = $this->db->get('menus');
    $result = array();

    foreach($menus->result() as $menu) {
        $result[$menu->name][$menu->id] = array(
            'page_id'    => $menu->page_id,
            'menu_id'    => $menu->menu_id,
            'item_name'  => $menu->item_name,
            'item_slug'  => $menu->slug,
            'item_order' => $menu->item_order,
            'item_level' => $menu->item_level,
            'parent_id'  => $menu->parent_id
        );
    }

    return $result;
}

$this->menu = $this->page->GetMenus();

<ul class="nav">
    <?php foreach($this->menu['default'] as $item) { ?>
        <li>
            <a href="<?php echo $item['item_slug']; ?>">
                <?php echo $item['item_name']; ?>
            </a>
        </li>
    <?php } ?>
</ul>

查看：

array(  
    [0] => array(
        [menu_id]    => 1,
        [menu_name]  => 'Menu 1',
        [menu_pages] => array(
            [0] => array(
                [id]         => 1,
                [page_id]    => 1,
                [menu_id]    => 1,
                [item_name]  => 'Home',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 2,
                [page_id]    => 2,
                [menu_id]    => 1,
                [item_name]  => 'About',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    ),
    [1] => array(
        [menu_id]    => 2,
        [menu_name]  => 'Menu 2',
        [menu_pages] => array(
            [0] => array(
                [id]         => 3,
                [page_id]    => 3,
                [menu_id]    => 2,
                [item_name]  => 'Services',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            ),
            [1] => array(
                [id]         => 4,
                [page_id]    => 4,
                [menu_id]    => 2,
                [item_name]  => 'Contact',
                [item_order] => 0,
                [item_level] => 0,
                [parent_id]  => ''
            )
        )
    )
)

function GetMenus() {
    $menus    = $this->db->get('menus');
    $menucols = $this->db->list_fields('menus');

    $pages    = $this->db->get('menu_pages');
    $pagecols = $this->db->list_fields('menu_pages');

    $arr      = array();
    $i        = 0;

    foreach($menus->result() as $menu) {
        foreach($pages->result() as $page) {
            foreach($pagecols as $col) {
                $arr[$i][$col] = $page->$col;
            }

            foreach($menucols as $cols) {
                $this->menus[$i][$cols] = $menu->$cols;

                if($arr[$i]['menu_id'] === $menu->id) {
                    $this->menus[$i]['menu_pages'] = $arr[$i];
                }
            }
        }

        $i++;
    }

    return $this->menus;
}

Array(
    [0] => Array(
        [id] => 1,
        [name] => default,
        [menu_pages] => Array(
            Array( /* missing #1, showing #2/2 */
                [id] => 2
                [page_id] => 1
                [menu_id] => 1
                [item_name] => About
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    ),
    [1] => Array(
        [id] => 2,
        [name] => menu2,
        [menu_pages] => Array(
            Array( /* missing #3, showing #4/4 */
                [id] => 4
                [page_id] => 3
                [menu_id] => 2
                [item_name] => Contact
                [item_order] => 0
                [item_level] => 0
                [parent_id] => 
            )
        )
    )
)

function GetMenus() {
    /* Yes, I know these can be chained, I unchained them to avoid
       horizontal scrolling on SO */
    $this->db->select('menus.name, menu_pages.*, pages.slug');
    $this->db->join('menu_pages', 'menu_pages.menu_id = menus.id');
    $this->db->join('pages', 'pages.id = menu_pages.page_id');
    $this->db->order_by('item_order', 'ASC');
    $menus  = $this->db->get('menus');
    $result = array();

    foreach($menus->result() as $menu) {
        $result[$menu->name][$menu->id] = array(
            'page_id'    => $menu->page_id,
            'menu_id'    => $menu->menu_id,
            'item_name'  => $menu->item_name,
            'item_slug'  => $menu->slug,
            'item_order' => $menu->item_order,
            'item_level' => $menu->item_level,
            'parent_id'  => $menu->parent_id
        );
    }

    return $result;
}

$this->menu = $this->page->GetMenus();

<ul class="nav">
    <?php foreach($this->menu['default'] as $item) { ?>
        <li>
            <a href="<?php echo $item['item_slug']; ?>">
                <?php echo $item['item_name']; ?>
            </a>
        </li>
    <?php } ?>
</ul>

---

然后在php端展开单元格

您可以将$this->菜单声明为：

$this->menus = array()

并使用

array\u push（）

函数，如下所示：

array_push($this->menus,$page->$col);

我还建议您在模型中执行联接操作，而不是在函数中循环，因为数据库可以快速执行，而且您的代码看起来也很优雅。

试试这个：

function GetMenus() {
    $menus = $this->db->get('menus');
    $pages = $this->db->get('menu_pages');
    $cols  = $this->db->list_fields('menu_pages');

    foreach($menus->result() as $menu) {
        $this->menus[$menu->id] = $menu;
        foreach($pages->result() as $page) {
            if($page->menu_id === $menu->id) { 
                foreach($cols as $col) {
                    $this->menus[$menu->id][$col][] = $page->$col;
                }
            }
        }
    }

    print_r($this->menus); // for debugging to see result

    return $this->menus;
}

---

您有两个查询，但我想我会选择带有连接的单个查询。这使得代码更短、更简单。我还没有测试下面的代码，但类似的东西应该可以工作：

function GetMenus()
{
  $this->db->select('menus.name, menu_pages.*');
  $this->db->join('menu_pages', 'menu_pages.menu_id = menus.id');
  $this->db->order_by('menus.id');
  $q = $this->db->get('menus');

  $result = array();
  $current_menu_id = NULL;
  $i = -1;

  foreach($q->result() as $row)
  {
    if($current_menu_id !== $row->menu_id)
    {
      $i++;
      $result[] = array('menu_id' => $row->menu_id,
                        'menu_name' => $row->name,
                        'menu_pages' => array()
                  );
    }

    $result[$i]['menu_pages'][] = array('id' => $row->id,
                                        'page_id' => $row->page_id,
                                        'menu_id' => $row->menu_id,
                                        'item_name' => $row->item_name,
                                        'item_order' => $row->item_order,
                                        'item_level' => $row->item_level,
                                        'parent_id' => $row->parent_id
                                  );

    $current_menu_id = $row->menu_id;
  }

  return $result;
}

---

如果您不了解第一次打印的结果，请查看您的答复，但我认为没有必要在这里进行连接，因为page\u id已经与pages.id相关，menu\u id与menus.id作为索引相关。我已经能够得到menu_id和page_id的结果，所以我似乎应该能够使用php来构建所有菜单和属于它们的页面的数组？我可能错了-请进一步解释。如果我是你，我会使用单张表，单张表中的自连接识别父id为0的父菜单和>0的子菜单。这里有一些教程，请参阅本论坛。它最初是一张表，但我发现需要将它们分开，原因有很多。例如，“菜单”表中的每一行都是一个新菜单，“菜单页面”表中的每一行都代表一个页面，该页面与菜单id（

menu\u pages.page\u id=>menus.id

）相关联。这就是为什么我认为我无法将实际页面添加到菜单表中-菜单及其关联页面似乎需要位于单独但相关的表中。我已经在类的顶部有了

$menus=array（）

，很抱歉没有澄清（尽管这是通过在代码中使用

$this->menus

暗示的）。据我所知，不需要使用

array_push（）

，因为

$menus['key']=$val

应该做同样的事情。它需要是多层面的。谢谢你的回复！嗯，沙扬，这是伟大的使用列表_领域，人们通常避免use@ChrisClower我已经更新了我的代码，请检查并让我知道它是否有效not@ChrisClower请将空索引放在$col前面。我已经更新了代码。现在，我已经在数组中添加了菜单数据。试试看，让我知道它是否有效。好的，把这行代码转换成$this->menus[$menu->id]['menu\u pages'][=$page->$colWow，我想你得到了（甚至没有测试代码？！我直接粘贴了它，没有任何更改！）我刚才打印的数组很漂亮！给我几分钟时间添加一些记录和测试，但我认为这是一个！我们赢了！非常感谢DIt说我要等19个小时才能颁发奖金，但我肯定会的！很高兴它起作用了。这不考虑

parent\u id

内容。如果你想考虑嵌套菜单，代码会变得更复杂，但对于你在问题中描述的，我认为这是最简单的解决方案。是的，这将是下一步（父母和孩子），这可能会变得混乱，因为它可能会添加更多的维度和嵌套数组。对我来说，这是一个hella复杂的数组，试图为现在的东西构建，哈哈。