jquery使用jsonp跨域请求代码示例

 1 <meta charset="utf-8">
 2 <script src="http://cdn.bootcss.com/jquery/1.11.1/jquery.min.js"></script>
 3 <script>
 4     function jsonpCallback(){
 5         alert(‘jsonpCallback‘);
 6     }
 7     $(document).ready(function(){
 8         $.ajax({ 
 9             url: "http://127.0.0.1/jsonp.php", 
10             data: {username:"admin", password: "admin"},
11             dataType: "jsonp",
12             jsonp: "callback",
13             success: function(data){
14                 alert(JSON.stringify(data));
15             },  
16             error:function(XHR, textStatus, errorThrown){
17                 alert(‘error: ‘ + errorThrown);
18             }
19         });
20     });
21 </script>

 1 <?php
 2 if (!empty($_SERVER[‘HTTPS‘]) && (‘on‘ == $_SERVER[‘HTTPS‘])) {
 3     $uri = ‘https://‘;
 4 } else {
 5     $uri = ‘http://‘;
 6 }
 7 $uri .= $_SERVER[‘HTTP_HOST‘].$_SERVER[‘REQUEST_URI‘];
 8      
 9 //获取jsonp回调函数的函数名，即url中callback=后面的值
10 $jsonp_callback = $_GET[‘callback‘]; 
11 if($_GET[‘username‘] == ‘admin‘ && $_GET[‘password‘] == ‘admin‘){
12     $data = array(‘msg‘=>‘登录成功‘);
13 }else{
14     $data = array(‘msg‘=>‘用户名或密码错误‘);
15 }
16 $json = json_encode($data);
17 //返回jsonp的回调函数名和参数
18 echo $jsonp_callback.‘(‘.$json.‘)‘;