Connection failed: SQLSTATE[HY000] [2002] Connection refused
Fatal error: Uncaught Error: Call to a member function query() on null in /www/wwwroot/patent.qingtingyigo.com/inc/coon.php:19
Stack trace:
#0 /www/wwwroot/patent.qingtingyigo.com/list.php(2): require_once()
#1 {main}
thrown in /www/wwwroot/patent.qingtingyigo.com/inc/coon.php on line 19