[PaaS only]{class="badge informative" title="Applies to Adobe Commerce on Cloud projects (Adobe-managed PaaS infrastructure) and on-premises projects only."}

During installation, fatal PDO error displays

This article provides a fix for an exception fatal PDO error during installation.

Issue

PHP Fatal error:  Class 'PDO' not found in /var/www/html/magento2/setup/module/Magento/Setup/src/Module/Setup/ConnectionFactory.php on line 44

Solution

Make sure you install all the required PHP extensions.