Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /var/www/html/index.php on line 6

Warning: mysqli::__construct(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: Name or service not known in /var/www/html/index.php on line 6

Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/index.php:6) in /var/www/html/index.php on line 8
Cannot get redirect: Error selecting DB.