How do I make my website compatible with the latest PHP version?

That depends on the software you are using and cannot be answered in general terms.

1. Check your software version
   Check the manufacturer's website to find out what the latest version of your software is and which PHP version it is compatible with.
2. Find out about update options
   The update process varies depending on the software:
   • Many applications offer automatic updates in the backend.
   • In some cases, the new version must be manually uploaded to the web server via FTP.
   • Occasionally, additional adjustments are required, such as to templates or plugins.

Since the procedures differ depending on the software, it is advisable to consult the manufacturer's documentation or the community. If you do not feel confident performing the update yourself, a webmaster can assist you.