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PHP can't establish ssl conection to update.dokuwiki.org because PHP's certification has expired

Take Bt Panel using by my server as an example，you can find php管理 at 应用管理处，Search “openssl.cafile” at configuration file, find the path of the certification file（for me is /etc/pki/tls/certs/ca-bundle.crt）, then use the file manager to open it.

Enter the https://curl.se/docs/caextract.html, download the latest certification file（cacert.pem）

Use Text Editor(e.g. VIM) to open the certification file，copy all of it，replace server's ca-bundle.crt with it, don't forget to save it.

Done!

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