database connect error
1:file /opt/webroot/cms/cms_web/index.php, class APP_APP, function run, line 15
2:file /opt/webroot/cms/cms_web/classes/app/app.php, class APP_APP, function exec, line 55
3:file /opt/webroot/cms/cms_web/classes/app/app.php, class CTRL_INDEX, function index, line 50
4:file /opt/webroot/cms/cms_web/classes/ctrl/index.php, class MODEL_OTHER, function links, line 36
5:file /opt/webroot/cms/cms_web/classes/model/other.php, class CORE_MODEL, function fetchAll, line 8
6:file /opt/webroot/cms/lib/core/model.php, class DB_MYSQLI, function fetchAll, line 77
7:file /opt/webroot/cms/lib/db/mysqli.php, class DB_MYSQLI, function query, line 280
8:file /opt/webroot/cms/lib/db/mysqli.php, class DB_MYSQLI, function connect, line 236
9:file /opt/webroot/cms/lib/db/mysqli.php, function throw_error, line 214