Question

我在使用此页面时遇到了一些问题，这是代码：

    <?php
//login.php
session_start();
require_once("function.php");

if(isset($_POST['username'], $_POST['password'])) //verify we've got what we need to work with
{
    /*********database_credentials.php**************/
    $mysqli = new MySQLi('localhost', 'root', '','hotel_vaniet'); 
    if($mysqli->errno)
        //connection wasn't made
        //handle the error here
        header("location: index.html"); //we'll just redirect for now
    /************************************************/  

    //We don't have to work about SQL injections here 
    $stmt = $mysqli->prepare("SELECT COUNT(username) AS total FROM users WHERE username = ? AND password = ?");
    //if the passwords in your table are hashed then you should apply the hashing and/or salts before passing it
    //they should in fact be hashed preferably with a hashing algorithm of the SHA family
    $stmt->bind_param('ss', $_POST['username'], $_POST['password']);
    $stmt->execute();
    $stmt->bind_result($total); //place the result (total) into this variable
    $stmt->fetch(); //fill the result variable(s) binded 

    //close all connections
    $stmt->close();
    $mysqli->close();

    //if total is equal to 1 then that means we have a match
    if((int)$total == 1)
    {
        session_regenerate_id(true); //delete old session variables
        /*********Explained below************/
        $_SESSION['user'] = $_POST['username'];
        $key = generate_key();
        $hash = hash_hmac('sha512', $_POST['password'], $key);
        $_SESSION['key'] = $key;
        $_SESSION['auth'] = hash_hmac('sha512', $key, 
                    hash_hmac('sha512', $_SESSION['user'] . 
                        (isset($_SERVER['HTTP_X_FORWARDED_FOR']) ? 
                               $_SERVER['HTTP_X_FORWARDED_FOR'] : 
                                   $_SERVER['REMOTE_ADDR']), $hash));
        /************************************/

        if(!setcookie('hash', $hash, 0, '/')) //login isn't possible if user's browser doesn't accept cookies
        {
            session_regenerate_id(true);
            header("location: index.html"); //original_page would be your login page
            exit();
        }
        header("location: dashboard.php");
    }
    else
    {
        //anything else we don't care about
        header("location: index.html");
    }
}
?>

我得到了这4个错误，我无法解决这个问题：

Warning: mysqli::mysqli(): in C:\xamp\htdocs\backend\validacredenciais.php on line 9

Warning: main(): Couldn't fetch mysqli in C:\xamp\htdocs\backend\validacredenciais.php on line 10

Warning: mysqli::prepare(): Couldn't fetch mysqli in C:\xamp\htdocs\backend\validacredenciais.php on line 17

Fatal error: Call to a member function bind_param() on a non-object in C:\xamp\htdocs\backend\validacredenciais.php on line 20

此页面是验证我的登录信息的页面。几天前这个问题没有出现的主要问题就是....

连接mysqli错误

0 个答案: