Change 990370 had a related patch set uploaded (by Cicalese; author: Cicalese):

[mediawiki/core@master] Change " to ' for values that may need to escape $

https://gerrit.wikimedia.org/r/990370

Change 990370 merged by jenkins-bot:

[mediawiki/core@master] Change " to ' for values that may need to escape $

https://gerrit.wikimedia.org/r/990370

Just happened something similar today while installing MediaWiki 1.42.1.

I ran the installation script, it asked for the user DB password (it contained a $ sign) and went on smoothly right to the end. I checked through phpMyAdmin and all tables were created (or better... a lot of tables were created, I didn't check the exact set of table had been created)

When I tried to access the wiki the first time it complained:

Cannot access the database: Access denied for user 'foo'@'localhost' (using password: YES) (localhost)

Looking at the LocalSettings.php I found

$wgDBpassword = 'abc\$def';

The "\" was not part of my password, it was added during the installation phase.

I removed the "\" and the problem was solved.

Some more information about my installation:

• MediaWiki 1.42.1
• PHP 8.1.29 (cgi-fcgi)
• ICU 69.1
• MySQL 8.0.37

Regards,
Massimiliano

The fix for this causes T372569.

In T355013#9998298, @Mpolito1969 wrote:

Looking at the LocalSettings.php I found

$wgDBpassword = 'abc\$def';

The "\" was not part of my password, it was added during the installation phase.

I removed the "\" and the problem was solved.

I think based on this it seems the fix might not be working correctly or fully. I have not tested