• 允许指定域名访问

 header('Access-Control-Allow-Origin:http://haiyuanshuo.cn'); 

• 允许所有的访问

 header('Access-Control-Allow-Origin:*'); 

• 运行跨域响应类型

 header('Access-Control-Allow-Methods:POST,GET,OPTIONS'); 

• 响应头设置Authorization

 header('Access-Control-Allow-Headers:Authorization');

• ajax 异步

header('Access-Control-Allow-Headers: X-Requested-With,X_Requested_With,X-PINGOTHER,Content-Type');