thinkPHP三级城市联动

html+js:

<!doctype html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>城市联动示例</title>

</head>

<body>

  	<select name="province" id="province" onchange="loadRegion('province',2,'city','{:U('Index/getRegion')}');">

  	<option value="0" selected>省份/直辖市</option><volist name="province" id="vo">

  	<option value="{$vo.id}" >{$vo.name}</option></volist>

	</select>

	<select name="city" id="city" onchange="loadRegion('city',3,'town','{:U('Index/getRegion')}');">

	 <option value="0">市/县</option>

	</select>

	<select name="town" id="town">

	 <option value="0">镇/区</option>

	</select>

</body>

<script type="text/javascript" src="__PUBLIC__/js/jquery-1.8.0.min.js"></script>

<script>

function loadRegion(sel,type_id,selName,url){

  jQuery("#"+selName+" option").each(function(){

    jQuery(this).remove();

  });

  jQuery("<option value=0>请选择</option>").appendTo(jQuery("#"+selName));

  if(jQuery("#"+sel).val()==0){

    return;

  }

  jQuery.getJSON(url,{pid:jQuery("#"+sel).val(),type:type_id},

    function(data){

      if(data){

        jQuery.each(data,function(idx,item){

          jQuery("<option value="+item.id+">"+item.name+"</option>").appendTo(jQuery("#"+selName));

        });

      }else{

        jQuery("<option value='0'>请选择</option>").appendTo(jQuery("#"+selName));

      }

    }

  );

}

</script>

</html>

php：

<?php

namespace Home\Controller;

use Think\Controller;

class IndexController extends Controller{

    /**

    * 用户信息查询

    */

    public function index(){

        $province = M('Tree')->where ( array('pid'=>1) )->select ();

        $this->assign('province',$province);

        $this->display();

    }

    public function getRegion(){

        $Region=M("Tree");

        $map['pid']=$_REQUEST["pid"];

        $map['type']=$_REQUEST["type"];

        $list=$Region->where($map)->select();

        echo json_encode($list);

    }

}

sql语句：

DROP TABLE IF EXISTS `gc_tree`;

CREATE TABLE `gc_tree` (

 `id` int(5) unsigned NOT NULL AUTO_INCREMENT,

 `pid` int(5) unsigned NOT NULL DEFAULT '0',

 `name` varchar(120) DEFAULT NULL,

 `type` tinyint(1) DEFAULT '2',

 PRIMARY KEY (`id`)

) ENGINE=MyISAM AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

数据文件：链接: https://pan.baidu.com/s/1jHMAxCU 密码: 5y79

巴特西

thinkPHP三级城市联动

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