尝试将连接传递到sqlsrv_query
就像是:
$querychange = sqlsrv_query($conn, "UPDATE customers SET userPass='$newpassword' WHERe userName='$username'");

尝试将连接传递到sqlsrv_query
就像是:
$querychange = sqlsrv_query($conn, "UPDATE customers SET userPass='$newpassword' WHERe userName='$username'");