// 指定允许其他域名访问 
header('Access-Control-Allow-Origin:http://abc.cn'); 

 // 允许所有域名访问 
header('Access-Control-Allow-Origin:*'); 

 // 允许跨域响应类型 
header('Access-Control-Allow-Methods:POST,GET,OPTIONS'); 

 // 响应头设置，允许设置Authorization和lpy这两个http头 
header('Access-Control-Allow-Headers:Authorization,lpy');

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