You need to treat this just like you would when changing domains.
The short version is:
-
You need to change the WordPress Address and Site Address in
Settings->General. You have to change both -
Or edit
wp-config.php
to alter the same values as in step #1. This one is easiest if you’ve already lost part of the site functionality. -
And alter the hard-coded addresses in the DB. I have always used Velvet
Blues Update Urls for that.
The Codex has a link to a helper script and a longer 15 step process. Read through that carefully before beginning.
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