ThinkPHP5.0框架学习 day1 Volist 与 foreach循环遍历

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已于 2025-06-10 14:26:24 修改

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于 2025-05-27 17:35:36 首次发布

本文链接：https://blog.youkuaiyun.com/cc_by_cc/article/details/148258248

1. 遍历循环输出

1.1. volist（错误）与 foreach（正确）输出一维数组

public function index3(){
    $array1 = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21];

    $array2 = [
       "id" => [1, 2, 3],
        "zone_id" => [4, 5, 6],
        "country_id" => [7, 8, 9],
        "3" =>[10, 11, 12, 13]
    ];
    dump($array2);
    $this->assign('arr1', $array1);
    $this->assign('arr2', $array2);
    return view();
}

<span>foreach循环输出一维数组</span>
{foreach name="arr1" item="vo"}
    <span>{$vo}</span>
{/foreach}
<hr/>

<span>volist循环输出一维数组</span>
{volist name="arr1" item="vo"}
<span>{$vo}</span>
{/volist}
<hr/>

1.2. volist（错误）与 foreach（正确）输出二维数组

public function index3(){
    $array1 = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21];

    $array2 = [
       "id" => [1, 2, 3],
        "zone_id" => [4, 5, 6],
        "country_id" => [7, 8, 9],
        "3" =>[10, 11, 12, 13]
    ];
    dump($array2);
    $this->assign('arr1', $array1);
    $this->assign('arr2', $array2);
    return view();
}

<!-- 遍历外层数组 -->
{foreach name="arr2" item="wo" key="key"}
<!-- 判断是否为关联数组的键 -->
    <!-- 遍历内层数组 -->
    {foreach name="wo" item="item"}
        <span>{$item}</span>
    {/foreach}
{/foreach}
<hr/>


{volist name="arr2" item="wo" key="key"}
<!-- 判断是否为关联数组的键 -->
<!-- 遍历内层数组 -->
{volist name="wo" item="item"}
<span>{$item}</span>
{/volist}
{/volist}
<hr/>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>筛选币商白名单</title>
</head>
<body>
<h1>筛选币商白名单</h1>
<form action="{url:('/admin/select/index)'}" method="post">
  <div>
    {:lang('foreach国家选择')}:
      <select class="form-control" name="country1"（上传的键） style="width: 140px;">
        <option value="-1">--</option>
        {foreach name="data" item="vo"}
          <option value="{$vo.country_code（上传的值）}">{$vo.name（显示的值）}</option>
        {/foreach}
        </select>
    <div>
      <button type="submit">提交</button>
    </div>
  </div>
</form>

<form action="{url:('/admin/select/index')}" method="post">
  <div>
    {:lang('volist国家选择')}:
    <select class="form-control" name="country2" style="width: 140px;">
      <option value="-1">--</option>
      {volist name="data" id="wo"}
      <option value ="{$wo.country_code}">{$wo.name}</option>
      {/volist}
    </select>
  </div>
  <div>
    <button type="submit">提交</button>
  </div>
</form>

</form>
</body>
</html>

1.3. volist（错误）与 foreach（正确）输出特定的键

public function index3(){
    $array1 = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21];

    $array2 = [
       "id" => [1, 2, 3],
        "zone_id" => [4, 5, 6],
        "country_id" => [7, 8, 9],
        "3" =>[10, 11, 12, 13]
    ];
    $this->assign('arr1', $array1);
    $this->assign('arr2', $array2);
    return view();
}

<!-- 遍历外层数组 -->
{foreach name="arr2" item="wo" key="item"}
<!-- 判断当前键是否为 "zone_id" -->
{if $item == 'zone_id'}
    <!-- 遍历 "zone_id" 对应的内层数组 -->
    {foreach name="wo" item="data"}
    <span>{$data}</span>
    {/foreach}
{/if}
{/foreach}
<hr/>

<!-- 遍历外层数组 -->
{volist name="arr2" item="wo" key="item"}
<!-- 判断当前键是否为 "zone_id" -->
{if $item == 'zone_id'}
<!-- 遍历 "zone_id" 对应的内层数组 -->
{volist name="wo" item="data"}
<span>{$data}</span>
{/volist}
{/if}
{/volist}
<hr/>

1.4. volist 输出用来输出数据库的查询

public function index3(){
    $array1 = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21];
    $array2 = [
       "id" => [1, 2, 3],
        "zone_id" => [4, 5, 6],
        "country_id" => [7, 8, 9],
        "3" =>[10, 11, 12, 13]
    ];

    $data = Db::table('country')
        ->alias('c')
        ->join(['user'=>'u'],'c.country_code = u.country_code','right')
        ->field('c.*,u.zone_id')
        ->select();
        dump($data);

    $this->assign('arr1', $array1);
    $this->assign('arr2', $array2);
    $this->assign('arr3', $data);
    return view();
}

{volist name="arr3" id="vo"}
    <span>{$vo.zone_id}</span>
{/volist}

1.5. foreach($data as $k => $dd) ，$k为数组的下标，$dd为数组里面的内容

public function index2(){
    $data = [
        ['id' => 1 ,'name' => 'ljl','age'=>22,'gender'=>"男"],
        ['id' => 2,'name' => 'xbl','age'=>20,'gender'=>"男"]
    ];
    foreach($data as $k => $dd) {
        dump("￥k的值是".$k);
        $t1str = "我是";
        $t1str .= $dd['name'].",";      // 所有元素的id追加到$t1str
        if($k % 2 == 0) {
            $t1str .= $dd['name']."你好，你为偶数"; // 偶数索引的id追加到$t1str1
            dump($t1str);
        } else {
            $t1str .= $dd['name']."你好，你为奇数"; // 奇数索引的id追加到$t1str2
            dump($t1str);
        }
    }
}