thinkPHP5实现的查询数据库并返回json数据实例

function json($code,$msg="",$count,$data=array()){
  $result=array(
   'code'=>$code,
   'msg'=>$msg,
   'count'=>$count,
   'data'=>$data
  );
  //输出json
  echo json_encode($result);
  exit;
}

<?php
namespace app\admin\controller;
use think\Controller;
use think\Validate;
use think\Request;
//use think\Db;
class Main extends controller
{
  public function index()
  {
    return $this -> fetch();
  }
//学校列表
  public function school()
  {
    $rs=db('school')->select();
    $rs1=json(0,'数据返回成功',1000,$rs);
    dump($rs1);die;//打印出来
    return $this -> fetch();
  }