Warning: mysqli::mysqli(): (HY000/2005): Unknown MySQL server host 'HOST' (4) in /var/www/html/test.bookerto.com/includes/connect.php on line 17 Warning: mysqli::query(): Couldn't fetch mysqli in /var/www/html/test.bookerto.com/includes/connect.php on line 19 Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2005] Unknown MySQL server host 'HOST' (4)' in /var/www/html/test.bookerto.com/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:43 Stack trace: #0 /var/www/html/test.bookerto.com/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(43): PDO->__construct('mysql:host=HOST...', 'USER', 'PASS', Array) #1 /var/www/html/test.bookerto.com/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOMySql/Driver.php(45): Doctrine\DBAL\Driver\PDOConnection->__construct('mysql:host=HOST...', 'USER', 'PASS', Array) #2 /var/www/html/test.bookerto.com/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(360): Doctrine\DBAL\Driver\PDOMySql\Driver->connect(Array, 'USER', 'PASS', Array) #3 /var/www/html/test.bookerto.com/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(429): Doctrine\DBAL\Connection->connect() #4 /var/www/html/test.bookerto.com/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(389): Doctrine\DBAL\Connection->getDatabaseP in /var/www/html/test.bookerto.com/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php on line 103