thinkPHP5实现的查询数据库并返回json数据实例

本文实例讲述了thinkPHP5实现的查询数据库并返回json数据。分享给大家供大家参考，具体如下：

TP5 实现查询数据库返回json数据(返回json数据函数实例)

返回结果：

{"code":0,"msg":"\u6570\u636e\u8fd4\u56de\u6210\u529f","count":1000,"data":[{"id":617,"title":"\u5317\u4eac\u7406\u5de5\u5927\u5b66","flid":1,"pid":0,"uid":1,"price":0,"admin_name":null,"time":"2017-09-22 16:17:16"},{"id":618,"title":"\u5357\u5f00\u5927\u5b66","flid":1,"pid":0,"uid":1,"price":0,"admin_name":null,"time":"2017-09-22 16:17:28"}]}

一、把格式化json函数写到公共文件common.php中,common.php文件路径在：application/common.php 所有文件文件都可以引用

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;
}

二、查询数据  控制方式 Main.php

application\admin\controller\Main.php

<?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();
  }