Fatal error: Uncaught mysqli_sql_exception: Unknown database 'tester' in E:\xampp\htdocs\yugioh\socket\vendor\mysql.php:19 Stack trace: #0 E:\xampp\htdocs\yugioh\socket\vendor\mysql.php(19): mysqli->__construct('localhost', 'root', Object(SensitiveParameterValue), 'tester') #1 E:\xampp\htdocs\yugioh\socket\vendor\mysql.php(15): SQLBasic->connect() #2 E:\xampp\htdocs\yugioh\socket\vendor\example.php(7): SQLBasic->__construct('localhost', 'root', 'mediafire', 'tester') #3 {main} thrown in E:\xampp\htdocs\yugioh\socket\vendor\mysql.php on line 19