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HomeBackend DevelopmentPHP Tutorial如何用PHP判断div 中的id值是否为空

  1. 如何用PHP判断 循环div里的 id 值是否为空,如果不是空则正常显示这个div层,如果为空则隐藏?

下面的代码是我的代码。

不知道用PHP来判断效率高还是用JQ判断效率高。

<code>//To try without API key: $video_list = json_decode(file_get_contents(''));
$video_list = json_decode(file_get_contents('https://www.googleapis.com/youtube/v3/search?order=date&part=snippet&channelId='.$channelId.'&maxResults='.$maxResults.'&key='.$API_key.''));

foreach($video_list->items as $item)
  {
    //Embed video
    if(isset($item->id->videoId)){
    echo '<div id="'. $item->id->videoId .'" class="xl12 xs6 xm4 xb3 video-box">
          <div class="media box-shadow padding-bottom video-box-inr clearfix">
            <a href="./video.php?v='.%20%24item->id->videoId%20.'" target="_blank" title="'. $item->snippet->title .'"><img src="./thumbnail.php?vid='.%20%24item->id->videoId%20.'" class="radius img-responsive" alt="'. $item->snippet->title .'"></a>
             <h6 id="strong-a-href-video-php-v-item-gt-id-gt-videoId-item-gt-snippet-gt-title-a-strong"><strong><a href="./video.php?v='.%20%24item->id->videoId%20.'">'. $item->snippet->title .'</a></strong></h6>
          </div>
        </div>
    ';

        }
        //Embed playlist
        else if(isset($item->id->playlistId))
        {
          echo '<div id="'. $item->id->videoId .'" class="xl12 xs6 xm4 xb3 video-box">
          <div class="media box-shadow padding-bottom video-box-inr clearfix">
            <a href="./video.php?v='.%20%24item->id->videoId%20.'" target="_blank" title="'. $item->snippet->title .'"><img src="./thumbnail.php?vid='.%20%24item->id->videoId%20.'" class="radius img-responsive" alt="'. $item->snippet->title .'"></a>
             <h6 id="strong-a-href-video-php-v-item-gt-id-gt-videoId-item-gt-snippet-gt-title-a-strong"><strong><a href="./video.php?v='.%20%24item->id->videoId%20.'">'. $item->snippet->title .'</a></strong></h6>
          </div>
        </div>
    ';
  }

}</code>

下面这段代码是视频列表的父div,id="这里获取视频的key ID号,"


//内部Html

因为是移步采集国外网站的视频,所以有时候获取不到视频的key ID,所以就无法加载。
怎么修改上面的代码实现,判断

这里面的 id="值" 是否为空,如果为空则用 style或者class 的 display:none属性隐藏这条空的视频信息?

回复内容:

  1. 如何用PHP判断 循环div里的 id 值是否为空,如果不是空则正常显示这个div层,如果为空则隐藏?

下面的代码是我的代码。

不知道用PHP来判断效率高还是用JQ判断效率高。

<code>//To try without API key: $video_list = json_decode(file_get_contents(''));
$video_list = json_decode(file_get_contents('https://www.googleapis.com/youtube/v3/search?order=date&part=snippet&channelId='.$channelId.'&maxResults='.$maxResults.'&key='.$API_key.''));

foreach($video_list->items as $item)
  {
    //Embed video
    if(isset($item->id->videoId)){
    echo '<div id="'. $item->id->videoId .'" class="xl12 xs6 xm4 xb3 video-box">
          <div class="media box-shadow padding-bottom video-box-inr clearfix">
            <a href="./video.php?v='.%20%24item->id->videoId%20.'" target="_blank" title="'. $item->snippet->title .'"><img src="./thumbnail.php?vid='.%20%24item->id->videoId%20.'" class="radius img-responsive" alt="'. $item->snippet->title .'"></a>
             <h6 id="strong-a-href-video-php-v-item-gt-id-gt-videoId-item-gt-snippet-gt-title-a-strong"><strong><a href="./video.php?v='.%20%24item->id->videoId%20.'">'. $item->snippet->title .'</a></strong></h6>
          </div>
        </div>
    ';

        }
        //Embed playlist
        else if(isset($item->id->playlistId))
        {
          echo '<div id="'. $item->id->videoId .'" class="xl12 xs6 xm4 xb3 video-box">
          <div class="media box-shadow padding-bottom video-box-inr clearfix">
            <a href="./video.php?v='.%20%24item->id->videoId%20.'" target="_blank" title="'. $item->snippet->title .'"><img src="./thumbnail.php?vid='.%20%24item->id->videoId%20.'" class="radius img-responsive" alt="'. $item->snippet->title .'"></a>
             <h6 id="strong-a-href-video-php-v-item-gt-id-gt-videoId-item-gt-snippet-gt-title-a-strong"><strong><a href="./video.php?v='.%20%24item->id->videoId%20.'">'. $item->snippet->title .'</a></strong></h6>
          </div>
        </div>
    ';
  }

}</code>

下面这段代码是视频列表的父div,id="这里获取视频的key ID号,"


//内部Html

因为是移步采集国外网站的视频,所以有时候获取不到视频的key ID,所以就无法加载。
怎么修改上面的代码实现,判断

这里面的 id="值" 是否为空,如果为空则用 style或者class 的 display:none属性隐藏这条空的视频信息?

直接用CSS

<code>DIV[id=""] { display: none; }</code>

WEB -> JS . SERVER -> PHP.

这个API获得json。难道数据不完整吗? 其中会有数据的id为空?好奇怪吧。

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