Warning: mysqli::mysqli(): (HY000/1049): Unknown database 'test_mysqli' in D:\phpStudy\WWW\work\20250919\mysqli_operations.php on line 10
错误: 连接失败: Unknown database 'test_mysqli'
Warning: mysqli::close(): Couldn't fetch mysqli in D:\phpStudy\WWW\work\20250919\mysqli_operations.php on line 94