jsonp跨域传值和返回值

<script> $(".button").click(function () { var token = $(".token").val(); $.ajax({ url:"http://localhost/demo/laravel/public/exam2_index_api?token="+token+"&format=json&jsoncallback=data", type:'GET', dataType:'jsonp', jsonpCallback:'data', success:function(result){ if(result.msg=='ok'){ }else if(result.msg=='faile'){ alert("登录失败"); } } }); }); </script> 返回值 echo $_GET['callback']."(".json_encode($data).")";