Ajax realizes infinite loading of lists and secondary drop-down option effects

This article mainly introduces Ajax to achieve infinite loading of lists and the effect of secondary drop-down options in detail. It has certain reference value. Interested friends can refer to

Ajax to achieve unlimited loading of lists. Make secondary drop-down options with Ajax for your reference. The specific content is as follows

//栏目Ajax做加载
public function ajaxlist(){
 //echo "http://www.域名.com/index.php?a=Index&c=Index&m=ajaxlist";
 //echo "
";
 $data = Q('sum');
 $where = array();
 $where['cid'] = 33;
 $rongyuList = M('content')->limit($data,2)->where($where)->select();
 $data['stat'] = 1;
 $data = $rongyuList;
 $this->ajax($data);
 //也可以手动把想要的字段拼接成字符串 
 /*echo "[";
 foreach($rongyuList as $k){
  echo "{"."\""."title"."\"".":"."\"".$k['title']."\"".","."\""."description"."\"".":"."\"".$k['description']."\"".","."\""."cid"."\"".":"."\"".$k['cid']."\""."}".",";  
 }
 echo "]";*/
 }

Specific page implementation:

Ajax makes secondary options:

 
科室：
 

  
   --请选择科室--
  
  
   --请选择专家--
  
 

Example controller:

//示例控制器
/* Ajax请求栏目列表 */
public function ajaxlanmu(){
 $lanmuList = M('category')->where('pid=142')->select();
 $this->ajax($lanmuList);
}
public function ajaxzhuanjia(){
 $where = array();
 $data = Q('sum');
 $data = $data ? $data : 143;
 $where['cid'] = $data;
 $zhuanjiaList = M('guahao')->where($where)->select();
 $this->ajax($zhuanjiaList);
}

Example: JS

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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