报了好多条错误
Notice: Use of undefined constant HOST - assumed 'HOST' in E:\XAMPP\htdocs\article\connect.php on line 4
Notice: Use of undefined constant USERNAME - assumed 'USERNAME' in E:\XAMPP\htdocs\article\connect.php on line 4
Notice: Use of undefined constant PASSNAME - assumed 'PASSNAME' in E:\XAMPP\htdocs\article\connect.php on line 4
Warning: mysql_connect(): in E:\XAMPP\htdocs\article\connect.php on line 4
Warning: mysql_connect(): in E:\XAMPP\htdocs\article\connect.php on line 4
php_network_getaddresses: getaddrinfo failed: ��֪��������������
Warning: mysqli_select_db() expects exactly 2 parameters, 1 given in E:\XAMPP\htdocs\article\connect.php on line 9
php_network_getaddresses: getaddrinfo failed: ��֪�������������� Array ( [title] => 123 [author] => 123 [description] => 123 [content] => 123 [button] => 提交 )
1、上面是详细错误，搜索和看了以前同学的问题，说是mysql5.x以上版本不支持？
2、我把host，username，password直接写在mysql_connect()里就没有这个报错。
3、应该也不是没有引入config.php的问题，因为输出了一些，显示ok。
4、我把全部代码替换为，慕课网资料下载里的代码同样不行。
5、我猜可能是数据库某方面的问题，有人遇到过这个问题吗？求解答。。。
