ajax跨域请求
        $.ajax({
            type: "get",
            async: true,
            url: "http://10.1.0.1/api-siteback",
            data:{urlk:urlk,user_id:user_id,company_id:company_id},
            dataType: "jsonp",
            jsonp: "callback",
            success: function(data){
                console.log(data,'88');
            },                      
        });
   后端php：
                $aa=$_GET['company_id'];
   		$callback = $_GET['callback'];
		$data=9;
		echo $callback.'('.json_encode($data).')';