php怎么返回数据给vue

npm install axios --save

import axios from "axios";
//将$axios挂在原型上，以便在实例中能用 this.$axios能够拿到
Vue.prototype.$axios = axios;

this.$axios.get('/localhost/userinfo.php?userid=10001')
 .then(function (response) {
 console.log(response);
 })
 .catch(function (error) {
 console.log(error);
 });

<?php
header('Content-Type:application/json; charset=utf-8');
$arr = array('userid'=>10001,'name'=>'老马','age'=>56);
exit(json_encode($arr));

{userid: 10001, name: "老马", age: 56}