跨域获取

本地：

<?php$_arr = array('a'=>1,'b'=>2,'c'=>3);$_result = json_encode($_arr);echo $_result;
?>

    //本地获取$('form input[type=button]').click(function(){$.ajax({type:"post",url:"test.php",async:true,dataType:'json',success:function(response,status,xhr){alert(response.a);}});});

 

跨域获取：假如在www.dang.cc上有一个test2.php文件如下

<?php$_arr = array('a'=>1,'b'=>2,'c'=>3);$_result = json_encode($_arr);$_callback = $_GET['callback'];echo $_callback."($_result)";
?>

    //远程获取$('form input[type=button]').click(function(){$.ajax({type:"post",url:"http://www.dang.cc/test2.php",async:true,dataType:'jsonp',success:function(response,status,xhr){alert(response.a);}});});