利用mysql查询总数据条数，再php处理数据转出数组，生成随机返回到页面，可以做成刷新页面，出现不同的内容

create table hxfimported(
   pid int primary key auto_increment,
   pic varchar(64),
   pname varchar(32),
   price float(10,2)
);
insert into hxfimported values
(null,"img/imported-6.jpg","越南白心火龙果 ","41.9"),
(null,"img/imported-1.jpg","泰国金枕头榴莲","118.0"),
(null,"img/imported-3.jpg","澳洲混合桉树蜂蜜","99.0"),
(null,"img/imported-4.jpg","马来西亚白咖啡","65.00"),
(null,"img/imported-2.jpg","爱伦蒂全脂纯牛奶","65.00"),
(null,"img/imported-39.jpg","西班牙特级橄榄油","65.00"),
(null,"img/imported-12.jpg","越南白心火龙果 ","41.9"),
(null,"img/imported-13.jpg","马来西亚白咖啡 ","41.9"),
(null,"img/imported-19.jpg","澳洲混合桉树蜂蜜 ","41.9"),
(null,"img/imported-7.jpg","泰国金枕头榴莲 ","41.9"),
(null,"img/imported-3.jpg","越南白心火龙果 ","41.9"),
(null,"img/imported-15.jpg","爱伦蒂全脂纯牛奶 ","41.9"),
(null,"img/imported-2.jpg","西班牙特级橄榄油 ","41.9"),
(null,"img/imported-17.jpg","越南白心火龙果 ","41.9");

<?php
      $conn=mysqli_connect("127.0.0.1","root","","hxf");
      $sql="set names utf8";
      mysqli_query($conn,$sql);
      $sql="select count(1) as number from hxfimported";
      $result=mysqli_query($conn,$sql);
      $data = mysqli_fetch_array($result);
      $count = $data['number'];
      $len=rand(0,$count-6);
      $sql="select pic,pname,price from hxfimported limit $len,6";
      $result=mysqli_query($conn,$sql);
      $list=array();
      if($result==false){
         echo "$len";
      }else{
           while(($row=mysqli_fetch_assoc($result))!=null){
           $list[]=$row;
        }
      }
       echo json_encode($list);

?>

<div class="imported-food common">
            <div class="weui-panel weui-panel_access">
                <a href="importedFoods.html">
                    <div class="weui-panel__hd"><p class="item-title">进口食品<span class="weui-cell-ft"></span></p></div>
                    <div class="weui-panel__bd">
                        <div class="weui-media-box weui-media-box_text">
                            <p class="weui-media-box__desc"><img src="img/imported-food-header.jpg" alt="" /></p>
                        </div>
                    </div>
               </a>
               <div class="weui-grids">

                </div>
            </div>
        </div>

$.getJSON("hxfimported.php",{},function(data){
                var _html="";
                $.each(data,function(i,item){
                    _html+=`<a href="local-${i+1}.html" class="weui-grid">
                        <div class="weui-grid__icon">
                            <img src="${item.pic}" alt="">
                        </div>
                        <p class="weui-grid__label">${item.pname}</p>
                        <p class="weui-grid__price">￥${item.price}</p>
                    </a>`
                })
                $('.imported-food .weui-grids').append(_html);
            });