当序列化字符串为空时如何隐藏div类？

Question

我正在使用php构建的网站，当序列化字符串为空时，我想在其中隐藏div，img和p标签。

我使用序列化字符串的php代码是：

<div class="pickup-from-items-location">
   <img src="/images/rsz_venueorange__1_.png"> 
   <p class="mt-5 mb-5 font-weight-bold">pickup from item's location </p>
   <div class="timings">
      <?php 
         $serialized = '';
         for ($i = 0; $i < count($data['item']->logistic_out); $i++) {
         if(strcmp($data['item']->logistic_out[$i]->logistics_type, "location_pickup") == 0)
         {
         $serialized .= strtolower($data['item']->logistic_out[$i]->logistics_times);
         }
         }
         if($serialized != '')
         {
         $unserialized = unserialize( $serialized );


         foreach($unserialized as $key=>$value) 
         {
         echo '
         <div class="dates_timings_items_availability"> 
         <div class="items_availability_weekdays">'. strtolower(date('l', strtotime($key))) .':</div>
         <div class="items_availability_time"><span>'. $value['start'] .'</span></div>
         <div class="delimiter">to</div>
         <div class="items_availability_time"><span>'. $value['end'] .'</span></div>
         </div>'; 
         } 
         }


         else
         {
         echo "<p style=\"font-style: italic;\">No information available</p>";
         }
         ?>
   </div>
</div>

问题陈述：

if($serialized != '')，我希望div p和img标签出现在if语句中。我尝试了以下代码，但似乎不起作用。

if($serialized != '')
 {
  echo
  '<div class="pickup-from-items-location">
  <img src="/images/rsz_venueorange__1_.png"> 
  <p class="mt-5 mb-5 font-weight-bold">pickup from item's location 
  </p>';

 $unserialized = unserialize( $serialized );


 foreach($unserialized as $key=>$value) 
 {
 echo '
 <div class="dates_timings_items_availability"> 
 <div class="items_availability_weekdays">'. strtolower(date('l', strtotime($key))) .':</div>
 <div class="items_availability_time"><span>'. $value['start'] .'</span></div>
 <div class="delimiter">to</div>
 <div class="items_availability_time"><span>'. $value['end'] .'</span></div>
 </div>'; 
 } 
 }

我想知道我需要在上面的代码中进行哪些更改，以便在序列化字符串为空时可以对p和img标签进行分割。