Description of the problem
Passing result of a query to ee()->dbutil->csv_from_result().
Query rows contain values that are blank / empty as per image example:

When the "description" value in this row is processed, a deprecation warning is thrown by php.

Error Messages

Deprecated

str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated

ee/legacy/database/DB_utility.php, line 187
Severity: E_DEPRECATED

Screenshots / Videos / Template Code
The lines giving the error (from line 184 of DB_utility.php)

        // Next blast through the result array and build out the rows
        foreach ($query->result_array() as $row) {
            foreach ($row as $item) {
                $out .= $enclosure . str_replace($enclosure, $enclosure . $enclosure, $item) . $enclosure . $delim;
            }
            $out = rtrim($out);
            $out .= $newline;
        }

Environment Details:

• Version: 7.4.11
• PHP Version 8.2

Possible Solution
wrap line containing str_replace() with test for $item != ""