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I have been asked to update a very old WP site. The original developer used some sort of plugin to disable all updates. (Could that be because some of the plugins might require paid updates?)
It looks like it was built with a Divi page builder.
Beyond doing the usual backup everything, should the usual procedure of update, core -> plugin -> themes work?
I can set the PHP version from 7.1/2/3/4 & 8.0.
The current plugins:
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Backup > disable plugins > update core > update plugins/theme one at a time. If something breaks you will know because you are doing one at a time > php 7.4 (a lot of wp plugins aren’t on 8 yet sadly) > If all else fails rollback to backup. Honestly with sites that are years old we rebuild and try to keep content though. If you’re lucky there won’t be compatibility issues. Hopefully none of those plugins or theme stopped being maintained by their developers. If they were maintained and survived after 4 years since wp 4.9.6 things should be OK.