Fatal error: Uncaught Error: Class "mysqli" not found in /var/www/narkology/api/db.php:6 Stack trace: #0 /var/www/narkology/api/header.php(4): require_once() #1 /var/www/narkology/public_html/алкогольная-зависимость/index.php(8): require_once('...') #2 {main} thrown in /var/www/narkology/api/db.php on line 6