Checking the php.ini reveals that extension=pdo is present and accounted for. Checking the extension directory (nginx\php\ext) reveals that the file "php_pdo.dll" is in fact missing. The installation ...

In PHP versions 8.1.* before 8.1.29, 8.2.* before 8.2.20, 8.3.* before 8.3.8, when using Apache and PHP-CGI on Windows, if the system is set up to use certain code pages, Windows may use "Best-Fit" ...