How does php clear the browser cache of the current page?

Yes. I changed a website and added a jump button between http and https on the home page. The homepage test is OK. (Home page, gray icon is http, Green is https) (content page, switch to https, it will force https access, only clear the browser...

Yes. I changed a website and added a jump button between http and https on the home page. The homepage test is OK.

(Home page, gray icon is http, Green is https)
I think it must be a browser cache problem. then I set no cache in the program and server, but it still doesn't work. Is there a solution?

Thank you for your attention. you have found the cause because you have enabled HSTS and disabled it.

4 answers

01. it may also be a session.

02. set the request header to no cache (no-cache)

CacheControl = no-cachePragma = no-cacheExpires =-1

For an article from Baidu, refer to header function parameters in php.

03. page cache settings in Apache

04. ob_clean (); try?