PHP Fatal Error: PDO Class Not Found

When encountering the "PHP Fatal error: Class 'PDO' not found" error, it indicates that the PDO (PHP Data Objects) extension is not installed or enabled in your PHP configuration. This is a common dependency for working with databases in PHP applications.

From the provided details, it appears that the PDO PHP extension is not installed on your system. To resolve this issue, follow these steps:

yum install php-pdo
yum install php-pdo_mysql

Once the required packages are installed, restart your web server to apply the changes:

service httpd restart

After restarting the web server, the PDO extension should be available for use in your PHP code. Verify that the PDO object is now recognized in your application and the error is resolved.