Php “如何改变”；“拒绝访问”；对于用户'；议程'@'；本地主机'；（使用密码：是）在第9行

使用以下代码：

<?php
class MySQLDB 
{
    var $connection; //The MySQL database connection
    var $num_active_users; //Number of active users viewing site
    var $num_active_guests; //Number of active guests viewing site
    var $num_members; //Number of signed-up users

    function MySQLDB() {
        $this->connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS) or die(mysql_error());
        mysql_select_db(DB_NAME, $this->connection) or die(mysql_error());

        $this->num_members = -1;

        if (TRACK_VISITORS) {
            $this->calcNumActiveUsers();
            $this->calcNumActiveGuests();
        }
    }
};
?>

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并确保键入正确的用户名、密码和数据库名称…：）

您输入了正确的主机/用户/密码组合？欢迎使用SO。请在正文中提出您的问题，并格式化您的代码。可能重复

$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}