Fatal error: Uncaught Error: Class 'mysqli' not found in D:\phpstudy_pro\WWW\tke-hz\app\system\include\class\mysql.class.php:28 Stack trace: #0 D:\phpstudy_pro\WWW\tke-hz\app\system\include\class\common.class.php(108): DB::dbconn('localhost', 'kyBDax', 'mvdsQu', 'tke-hz', '3306') #1 D:\phpstudy_pro\WWW\tke-hz\app\system\include\class\common.class.php(49): common->load_mysql() #2 D:\phpstudy_pro\WWW\tke-hz\app\system\include\class\web.class.php(27): common->__construct() #3 D:\phpstudy_pro\WWW\tke-hz\app\system\feedback\web\feedback.class.php(16): web->__construct() #4 D:\phpstudy_pro\WWW\tke-hz\app\system\include\class\load.class.php(293): feedback->__construct() #5 D:\phpstudy_pro\WWW\tke-hz\app\system\include\class\load.class.php(168): load::_load_class('D:\\phpstudy_pro...', 'feedback', 'dofeedback') #6 D:\phpstudy_pro\WWW\tke-hz\app\system\entrance.php(94): load::module() #7 D:\phpstudy_pro\WWW\tke-hz\feedback\index.php(9): require_once('D:\\phpstudy_pro...') #8 {main} thrown in D:\phpstudy_pro\WWW\tke-hz\app\system\include\class\mysql.class.php on line 28