多个微型网站将作为一个登录

Question

I have multiple microsites:

https://www.samplesite.com
https://subdomain2.samplesite.com
https://subdomain3.samplesite.com
https://subdomain4.samplesite.com
https://subdomain5.samplesite.com

Once I login to one of these, it should also automatically create a logged session for other microsites just like GOOGLE.

How can I do this? Any ideas?

As I know, session is individually created for each domains and is certainly not readable for other domains.

P.S. I am using codeigniter as framework.

Answer 1

You should be searching the keyword "Single Sign-On". There are many ways to do it. But basically, you'd need:

1. A broker server for centralized login service. This server would allow user to login (through OAuth or whatever mean) and hold session information. And provide ways for other website (i.e. application) to retrieve that session information.
2. Adapt your websites (i.e. application) to use the broker server's session. Probably with mixed backend php and frontend js work.

A quick search for PHP library yield this result:

https://github.com/legalthings/sso

There are probably other libraries that can do the same trick.