Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo for tcnsql.db failed: Name does not resolve in /home/public/includes/db_connect.php on line 7

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for tcnsql.db failed: Name does not resolve in /home/public/includes/db_connect.php:7 Stack trace: #0 /home/public/includes/db_connect.php(7): mysqli->__construct('tcnsql.db', 'slimofq', 'BhpX#WQ%cu-9e', 'tcn-bm') #1 /home/public/login.php(6): require_once('/home/public/in...') #2 {main} thrown in /home/public/includes/db_connect.php on line 7