Question

我正在努力显示一些内容，具体取决于数组属性是否具有值。如果文章有标题，我想显示整篇文章的内容，如果不是，我想展示其他内容。但是，它不起作用。 else语句中的代码不会被执行。

这里有什么问题？

我的代码是：

@foreach($restaurantmenue as $daily)
                    @foreach($daily->articles as $menue)
                     @if(!empty($menue->title))
                       <div class="card card-horizontal">
                         <div class="row">
                           <div class="col-md-5">
                             <div class="image" style="background-image: url({{asset('images/frontend/profile/profileHero.jpg')}}); background-size: cover; background-position: center center;">
                               <img src="{{asset('images/frontend/profile/profileHero.jpg')}}" alt="..." style="display: none;">
                               <div class="filter filter-azure">
                                 <button type="button" class="btn btn-neutral btn-round">
                                     <i class="fa fa-heart"></i> SMÄCKT MIR
                                 </button>
                               </div>
                             </div>
                           </div>
                           <div class="col-md-7">
                                <div class="content">
                                  <p class="category text-info">
                                       <i class="fa fa-trophy"></i> Best of
                                   </p>

                                   <a class="card-link" href="#">
                                       <h4 class="title">{{$menue->title}} </h4>
                                   </a>
                                   <a class="card-link" href="#">
                                       <p class="description">{{$menue->body}}</p>
                                       <br />
                                       {{$menue->price}} €
                                   </a>
                                    <div class="footer">
                                       <div class="stats">
                                           <a class="card-link" href="#">
                                              <i class="fa fa-male"></i> {{$restaurant->name}}
                                           </a>
                                       </div>
                                       <div class="stats">
                                         <a class="card-link" href="#">
                                           <i class="fa fa-comments"></i> 23 Comments
                                         </a>
                                       </div>
                                       <div class="stats">
                                          <a class="card-link" href="#">
                                           <i class="fa fa-heart"></i> 231 Likes
                                          </a>
                                       </div>
                                   </div>
                               </div>
                           </div>
                         </div>
                       </div>
                      @else
                        No Articles for Today
                     @endif
                    @endforeach
                @endforeach

Answer 1

如果您在laravel中使用ORM获取数据，如

$data = \App\Model::get();

然后您可以检查$data是否为空，如下所示：

@if(!$data->isEmpty())
     // $data is not empty
@else
    // $data is empty
@endif

参考：Check Here

但是如果您使用find或findOrFail，则可以将数组检查为

$data = \App\Model::findOrFail($id);


@if(!empty($data))
     // $data is not empty
@else
    // $data is empty
@endif

Answer 2

好吧，如果文章不为空，则执行代码。但是else语句中的代码仍未执行。我仍然无法显示＆＃34;没有文章＆＃34;消息它没有可用的文章

  @if(!$restaurantmenue->isEmpty())
                    @foreach($restaurantmenue as $daily)
                        @foreach($daily->articles as $menue)

                           <div class="card card-horizontal">
                             <div class="row">
                               <div class="col-md-5">
                                 <div class="image" style="background-image: url({{asset('images/frontend/profile/profileHero.jpg')}}); background-size: cover; background-position: center center;">
                                   <img src="{{asset('images/frontend/profile/profileHero.jpg')}}" alt="..." style="display: none;">
                                   <div class="filter filter-azure">
                                     <button type="button" class="btn btn-neutral btn-round">
                                         <i class="fa fa-heart"></i> SMÄCKT MIR
                                     </button>
                                   </div>
                                 </div>
                               </div>
                               <div class="col-md-7">
                                    <div class="content">
                                      <p class="category text-info">
                                           <i class="fa fa-trophy"></i> Best of
                                       </p>

                                       <a class="card-link" href="#">
                                           <h4 class="title">{{$menue->title}} </h4>
                                       </a>
                                       <a class="card-link" href="#">
                                           <p class="description">{{$menue->body}}</p>
                                           <br />
                                           {{$menue->price}} €
                                       </a>
                                        <div class="footer">
                                           <div class="stats">
                                               <a class="card-link" href="#">
                                                  <i class="fa fa-male"></i> {{$restaurant->name}}
                                               </a>
                                           </div>
                                           <div class="stats">
                                             <a class="card-link" href="#">
                                               <i class="fa fa-comments"></i> 23 Comments
                                             </a>
                                           </div>
                                           <div class="stats">
                                              <a class="card-link" href="#">
                                               <i class="fa fa-heart"></i> 231 Likes
                                              </a>
                                           </div>
                                       </div>
                                   </div>
                               </div>
                             </div>
                           </div>



                        @endforeach
                    @endforeach
                  @else
                    no article
                @endif

Answer 3

希望这对你有所帮助。

$processes = [1, 2, 4, 5];
$maintenance = [1, 2, 3, 4, 5];

$array_value = function ($value, $array) {
    $str = "$value";
    if (in_array($str, $array)) {
        echo 5;
    } else {
        echo 1;
    }
};

foreach ($maintenance as $m) {
    $array_value ($m, $processes);
}

基本上我正在比较两个数组，如果在另一个数组上找到数据，则显示5

Laravel检查Array是否为空

3 个答案: