Notice: Use of undefined constant admin_name - assumed 'admin_name' in D:\phpStudy\WWW\ehsg.cn\check_login.php on line 3

Notice: Undefined index: admin_name in D:\phpStudy\WWW\ehsg.cn\check_login.php on line 3

Warning: mysql_connect(): Access denied for user 'root'@'localhost' (using password: YES) in D:\phpStudy\WWW\ehsg.cn\conn\conn.php on line 2
数据库服务器连接错误Access denied for user 'root'@'localhost' (using password: YES)