CORS,全称（Cross-origin resource sharing）(跨域资源共享)

PHP
header("Access-Control-Allow-Origin:http://localhost:911");
header("Access-Control-Allow-Methods: POST, GET, OPTIONS, HEAD");
header("Access-Control-Allow-Headers: Authorization, X-Requested-With, X-PINGOTHER, Content-Type");
header("Access-Control-Allow-Credentials: true");

Credentials false的时候 origin methods 这些可以写成*