Error: Class "PDO" not found in /var/www/html/init.php:22
Stack trace:
#0 /var/www/html/includes/load-settings.php(75): open_connection()
#1 /var/www/html/includes/load-settings.php(7): load_site_settings()
#2 /var/www/html/site-settings.php(3): require('...')
#3 /var/www/html/init.php(13): require('...')
#4 /var/www/html/index.php(16): require('...')
#5 {main}