PHP中的foreach循环条件执行

如何解决PHP中的foreach循环条件执行

<div class="col-lg-4 col-md-4">
     <div class="media-banner mb-3 mb-lg-0 banner-bottom">
        <a href="{!! URL::to('product-list/8/women') !!}"  class="banner-container">
        <img src="{{ asset('frontend/img/women.jpg') }}" alt="" class="img-fluid" >
        </a>
     </div>
     <div class="media-banner mb-3 mb-lg-0 banner-bottom">
        <a href="{!! URL::to('product-list/10/girls') !!}"  class="banner-container">
        <img src="{{ asset('frontend/img/girls.jpg') }}" alt="" class="img-fluid">
        </a>
     </div>
  </div>

  <div class="col-lg-4 col-md-4">
     <div class="media-banner mb-3 mb-lg-0">
        <a href="{!! URL::to('product-list/9/men') !!}"  class="banner-container">
        <img src="{{ asset('frontend/img/men.jpg') }}" alt="" class="img-fluid" >
        </a>
     </div>
  </div>

  <div class="col-lg-4 col-md-4">
     <div class="media-banner mb-3 mb-lg-0 banner-top">
        <a href="{!! URL::to('product-list/11/boys') !!}"  class="banner-container">
        <img src="{{ asset('frontend/img/boys.jpg') }}" alt="" class="img-fluid">
        </a>
     </div>
     <div class="media-banner mb-3 mb-lg-0 banner-top">
        <a href="{!! URL::to('product-list/12/hijab') !!}"  class="banner-container">
        <img src="{{ asset('frontend/img/b.jpg') }}" alt="" class="img-fluid">
        </a>
     </div>
  </div>

这是我需要动态制作的示例HTML 对于前两个项目，单独有一个col-MD-4类用于第3个项目col-MD-4类，对于第4个和第5个项目，则另外一个col-MD-4类

我试图解决这个问题，我的代码是

@PHP $slno = 1;  @endPHP
  @foreach($categories as $n)
  @PHP $key = strtolower(preg_replace("/[^a-zA-Z0-9]+/","-",$n->name)) @endPHP
  @if($slno!=3)
   <div class="col-lg-4 col-md-4">
     <div class="media-banner mb-3 mb-lg-0 @if($slno == 1 || $slno == 2){{ 'banner-bottom' }} @elseif($slno == 3 || $slno == 4){{ 'banner-top' }}@endif">
        <a href="{!! URL::to('product-list/'.$n->id.'/'.$key) !!}"  class="banner-container">
        <img src="{{ asset('categories/'.$n->image) }}" alt="" class="img-fluid" >
        </a>
     </div>
  </div>
  @else
  <div class="col-lg-4 col-md-4">
     <div class="media-banner mb-3 mb-lg-0">
        <a href="{!! URL::to('product-list/'.$n->id.'/'.$key) !!}" class="banner-container">
        <img src="{{ asset('categories/'.$n->image) }}" alt="" class="img-fluid" >
        </a>
     </div>
  </div>
  @endif
  @PHP $slno++; @endPHP
  @endforeach

但是我肯定是错的。

我需要帮助。 实际上看起来像这样。

解决方法

此代码可能会对您有所帮助，

for ($i=1; $i <= 5; $i++) { 
    echo $i;
    if($i == 1 || $i == 2){
      if($i == 1){
        echo "col-md-4";
      }
        echo "Bottom";echo "<br>";
        if($i == 2){
        echo "col-md-4 close tag";
      }
    }else if($i == 4 || $i == 5){
      if($i == 4){
        echo "col-md-4";
      }
        echo "Top";echo "<br>";
        if($i == 5){
        echo "col-md-4 close tag";
      }
    }else{
        echo "Center";echo "<br>";
    }
}

,

此代码可能有效

    //Enter your code here,enjoy!


   $de_chunked = [1,2,3,4,5,6,7,8,9,10,11,12,13,14];


 $d = array_chunk($de_chunked,3);


foreach($d as $k => $val)
{
  $i = 1;
   foreach($val as $ke => $vals)
   if($i++ == 3)
      {
        echo 'Yes   ';
      }else{
        echo "No   ";
      }

}

结果为：否否是否否是否否是否否是否