wp-config overrides of WP_HOME and WP_SITEURL are forgotten when installing MultiSite.

[billpg]

The chain of events I encountered when playing with WordPress on my home server.

1. Installed WP successfully.
2. I changed the two URL settings to the wrong value by accident.
3. Tried logging back into the admin panel, but I kept being redirected to the wrong place, the one I had mis-typed.
4. Google'd for a fix that would avoid my having to reinstall from scratch and found you can override these two settings in wp-config. I added the correct values for WP_HOME and WP_SITEURL.
5. Finding access to my website restored, I forgot about the two settings editable on the setting panel.
6. I switched on Multi-Site by setting WP_ALLOW_MULTISITE in wp-config.
7. I followed the Network-Setup panel, opting for subfolders. (The sample code to paste into wp-config had the correct name for DOMAIN_CURRENT_SITE.)
8. I followed the instructions to update both wp-config and .htaccess.
9. I went to the login page and saw the page layout was all messed up. Investigating, I found the CSS etc links were all to the mistyped URL I had typed back in step 2.

Note, after restoring the htaccess and wp-config (but keeping my WP_HOME and WP_SITEURL changes) I found I could not update the wrong settings in the DB, as both text boxes were greyed out.

WP multi-site appears to have some reference one of the two URL settings in the database. This should defer to the replacement settings in wp-config.

[sabernhardt]

Hi and thanks for the report!

This seems to be very similar to #33909. (Close this as a duplicate?)

Changeset [14517] intentionally removed URL filters in multisite to correct the admin URL, and reinstating them probably could break other things now. Supporting the config constants would be an enhancement (see also #57269).