如何在php中显示使用数组的多选下拉菜单？

Question

我想像父级一样下拉，子级表示使用引导CSS的多级任务。我尝试了下面的方法，但我在孩子阶段就得到了所有课程的名称。我想要下拉列表，如下所示

Linux --Linux基础

CSS --CSS基础

下面是我的代码：

<ul class="sub-menu" style="border-right: 2px solid #012340;">
    <?php foreach($outContentArrResults AS $courseName=> $valArrMenu){ ?>
        <li class="menu-item-has-children">
          <a href="#"><?php echo isset($valArrMenu[0]) ? $valArrMenu[0]:'';?  ></a>

            <ul class="sub-menu" style="border-right: 2px solid #012340;border-left: 2px solid #012340;">
            <?php for($i=0; $i<count($valArrMenu['slug']); $i++){?>
                <li>
                   <a href="<?php echo $config['LIVE_URL'];?>courses/<?php isset($valArrMenu['slug'][$i]) ? $valArrMenu['slug'][$i]:'';?>"><?php echo isset($valArrMenu[$i]) ? $valArrMenu[$i]:'';?></a>
                </li>
            <?php } ?>
            </ul>
        </li>
    <?php } ?>
    </ul>

下面是我的数组值：

         Array
      (
              [mainCourse] => Array
      (
        [0] => linux
        [slug] => Array
             (  
                [0] => linux
                [1] => linux-basics
                [2] => first-steps
                [3] => last
                [4] => sdd
                [5] => css
                [6] => css-basics
                [7] => css-introduction
                [8] => linux-sub
                [9] => test-sub-sub-linux
            )

        [1] => linux Basics
        [2] => first steps
        [3] => last
        [4] => sdd
        [5] => css
        [6] => css Basics
        [7] => css Introduction
        [8] => linux sub
        [9] => test sub sub linux
    )

)
$arrCourses = $this->objWsCoursesModel->getMainMenuCourses();
        //print_r($arrCourses);
        $outResults = array();
        for($i=0; $i<count($arrCourses); $i++){
            $courseName = isset($arrCourses[$i]['course_name']) ? $arrCourses[$i]['course_name'] : '';
            $outResults['mainCourse'][] = $courseName;
            $outResults['mainCourse']['slug'][] = isset($arrCourses[$i]['course_slug_name']) ? $arrCourses[$i]['course_slug_name'] : '';
        }

Answer 1

您正在制作一个非常复杂的数组，这将很难实现;)

尝试此数组：

$arrCourses = $this->objWsCoursesModel->getMainMenuCourses();
$outResults = array();
for($i=0; $i<count($arrCourses); $i++){
    $courseName = isset($arrCourses[$i]['course_name']) ?    $arrCourses[$i]['course_name'] : '';
    $outResults['mainCourse'][$courseName][] = isset($arrCourses[$i]['course_slug_name']) ? $arrCourses[$i]['course_slug_name'] : '';;
}

并尝试此代码。这是一种粗糙的代码。我不确定是否有语法错误，但我认为它会像这样工作：

<ul>
<?php foreach($outContentArrResults AS $courseName=> $valArrMenu){ ?>
<li class="menu-item-has-children">
    <a href="#"><?php echo $courseName ?></a>
    <ul class="sub-menu" style="border-right: 2px solid #012340;border-left: 2px solid #012340;">
        <?php for($valArrMenu as $row){?>
        <li>
            <a href="<?php echo $config['LIVE_URL'];?>courses/<?php isset($valArrMenu['slug'][$i]) ? $valArrMenu['slug'][$i]:'';?>"><?php echo isset($valArrMenu[$i]) ? $valArrMenu[$i]:'';?></a>
        </li>
        <?php } ?>
    </ul>
</li>
<?php } ?>
</ul>

Answer 2

您可以像这样尝试，它以数组格式返回值。我将此函数用于项目类别树，

   function categoryDropDown($categoryArray, $parentId, $level, $options)
{
    $level++;
    foreach ($categoryArray  as  $array)
    {
        if($array['parentId'] == $parentId)
        {
            $opt = $array['name'] ;
            $categoryLevel = $level -1;
            $options[$array['id']] =  array("id"=> $array['id'], "categoryName"=>"$opt","level" => "$categoryLevel", "status" => $array['status']);
            $newParent = $array['id'];
            $options = categoryDropDown($categoryArray, $newParent, $level , $options);
        }
    }
    return $options;
}

-输出

    $options= categoryDropDown();      //now it will converted into an Array.

所以你可以像这样打印选项

  <?php
    foreach($options as $value)
    {
    ?>

    <option value="<?php echo $value['id']; ?>"> <?echo $value['categoryName']; ?> </option>

    //Which is similar to <option value="option name/id">Option 1</option>

    <?php
    }
    ?>

数组输出如下所示(这里的索引是我的DataBase中的主键)

Array
(
    [1] => Array
        (
            [id] => 1
            [categoryName] => Electronics
            [level] => 0
            [status] => d
        )

    [3] => Array
        (
            [id] => 3
            [categoryName] => Laptops
            [level] => 1
            [status] => a
        )

    [6] => Array
        (
            [id] => 6
            [categoryName] => Laptop Accessories
            [level] => 2
            [status] => a
        )

    [2] => Array
        (
            [id] => 2
            [categoryName] => Mobile
            [level] => 1
            [status] => a
        )

    [5] => Array
        (
            [id] => 5
            [categoryName] => Mobile Accessories
            [level] => 2
            [status] => d
        )

    [4] => Array
        (
            [id] => 4
            [categoryName] => Tablet
            [level] => 1
            [status] => a
        )

    [12] => Array
        (
            [id] => 12
            [categoryName] => Fashion
            [level] => 0
            [status] => a
        )

    [13] => Array
        (
            [id] => 13
            [categoryName] => Men
            [level] => 1
            [status] => a
        )

    [15] => Array
        (
            [id] => 15
            [categoryName] => Jeans
            [level] => 2
            [status] => a
        )

    [14] => Array
        (
            [id] => 14
            [categoryName] => Women
            [level] => 1
            [status] => a
        )

    [16] => Array
        (
            [id] => 16
            [categoryName] => Jeans
            [level] => 2
            [status] => a
        )

    [11] => Array
        (
            [id] => 11
            [categoryName] => Main Category 2
            [level] => 0
            [status] => a
        )

    [33] => Array
        (
            [id] => 33
            [categoryName] => temp
            [level] => 0
            [status] => a
        )

)

您还可以参考Simple recursive tree in PHP / MySQL

Answer 3

是的，munjal的解决方案是正确的。而且你也在制作非常复杂的数组结构。如果您擅长jquery和json解析，那么可以在页面上加载js函数，您可以在其中为菜单树创建json数组。在db中，您可以轻松地进行管理。