一、前端代码
<html> <head> <title>bian</title> <Meta charset="utf-8" /> <script src="http://cdn.bootcss.com/jquery/1.11.2/jquery.min.js"></script> <script type="text/javascript"> function check(){ var aData=testAsync();//aData={"login":"1","message":"sucessful"} if(aData.login==1){ $('#message').css({display:'block'}); $('.error').html('用户名存在'); } } function testAsync() { //定义一个全局变量来接受$post的返回值 var result; //用ajax的“同步方式”调用一般处理程序 $.ajax({ url: "<{$URL1}>/example/perfdata/format/json",//url: "/project/CI/index.PHP/example/perfdata/format/json",async: false,//改为同步方式 type: "post",success: function (DataValue) { result = DataValue; } }); return result; } </script> </head> <body> <h1>ajax异步调用演示</h1> <button type="button" onclick="check()">异步调用</button> <div id="message" style="display:none"> <p class="error"></p> </body> </html>
二、后端代码
1、restful接口
<?PHP defined('BASEPATH') OR exit('No direct script access allowed'); // This can be removed if you use __autoload() in config.PHP OR use Modular Extensions require APPPATH.'/libraries/REST_Controller.PHP'; class Example extends REST_Controller { public function perfdata_post(){ $arr = array('login'=>'1','message'=>'sucessful'); $this->response($arr,200); } }原文链接：https://www.f2er.com/ajax/163686.html
