Fatal error: Uncaught PDOException: SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo for mysql failed: Temporary failure in name resolution in /var/www/html/config/db.php:19 Stack trace: #0 /var/www/html/index.php(3): require_once() #1 {main} thrown in /var/www/html/config/db.php on line 19