Fatal error: Uncaught mysqli_sql_exception: 由于目标计算机积极拒绝，无法连接。 in C:\xampp\htdocs\updatejd\conn.php:3 Stack trace: #0 C:\xampp\htdocs\updatejd\conn.php(3): mysqli_connect('localhost', 'root', Object(SensitiveParameterValue), 'vip') #1 C:\xampp\htdocs\updatejd\insertdata_test.php(3): include_once('C:\\xampp\\htdocs...') #2 {main} thrown in C:\xampp\htdocs\updatejd\conn.php on line 3