WordPress core function causing persistent deprecated warning when WP_DEBUG enabled

[earthman100]

Upgrading to PHP 8.1 surfaces this

Deprecated: mysqli_real_connect(): Passing null to parameter #5 ($database) of type ?string is deprecated in /code/wp-includes/class-wpdb.php on line 1987 
Deprecated: mysqli_real_connect(): Passing null to parameter #7 ($socket) of type ?string is deprecated in /code/wp-includes/class-wpdb.php on line 1987

From what I can see, Parameter # 5 and # 7 are both explicitly set as null directly in the core file - see attached:

[earthman100]

This is on Pantheon hosting.

[SergeyBiryukov]

Hi there, thanks for the ticket!

This was previously raised in #56836 and #54877:

• The $database, $port, and $socket parameters of mysqli_real_connect() should actually be nullable, as they are null by default in ​PHP source, per comment:15:ticket:54877. According to the ​PHP manual, these parameters can all accept null.
• The issue is caused by ​LiteSpeed PHP, per comment:3:ticket:56836.

[earthman100]

Not using LiteSpeed directly

Looks like Pantheon has flagged it as related to New Relic monitors.

Thanks, it's awaiting a patch.