Can'；t使用OOP PHP登录（准备好的语句）_Php_Ajax_Oop_Login_Prepared Statement

Can'；t使用OOP PHP登录（准备好的语句）

php ajax oop login

Can'；t使用OOP PHP登录（准备好的语句）,php,ajax,oop,login,prepared-statement,Php,Ajax,Oop,Login,Prepared Statement,最近，我一直在努力使用OOP-PHP和Prepared语句创建登录系统。当我在输入正确的用户名和密码后单击登录按钮时，它仍然验证我输入了错误的用户名和密码。这是我的密码。任何帮助都将不胜感激。谢谢 login.php <?php require_once 'templates/header.php'; ?> <link rel="stylesheet" type="text/css" href="styles/login-style.css"> <sc

最近，我一直在努力使用OOP-PHP和Prepared语句创建登录系统。当我在输入正确的用户名和密码后单击登录按钮时，它仍然验证我输入了错误的用户名和密码。这是我的密码。任何帮助都将不胜感激。谢谢

login.php

<?php 
    require_once 'templates/header.php';
?>

<link rel="stylesheet" type="text/css" href="styles/login-style.css">

<script type="text/javascript" src="https://code.jquery.com/jquery- 
3.3.1.min.js"></script>

<script type="text/javascript">

$(document).ready(function(){
    $('#login').click(function(event){
        event.preventDefault();
        var username = $('#usernameID').val();
        var password = $('#passwordID').val();

        $.post("validation/validation_login.php",{
            user_val : username,
            password_val : password,

        },function(data){
            $('.error-message').html(data);
        });
    });
});

</script>

<title>Login</title>
<form>
    <h1>Login</h1>
    <input type="text" id="usernameID" name="username" 
    placeholder="Username" autocomplete="off"> <br>

    <input type="password" id="passwordID" name="password" 
    placeholder="Password" autocomplete="off"> <br>

    <input type="button" id="login" name="register-button" value="Login">

</form>

<div class="error-message">

</div>

<?php 
    require_once 'templates/footer.php';
?>

<?php 

    require_once '../classes/input.php';
    require_once '../classes/session.php';
    require_once '../classes/database.php';

    class validation_login{

        private $username,$password;
        public $errorMessage;

        public function validate_login(){
            $db = new database();
            $this->username = input::get('user_val');
            $this->password = input::get('password_val');

            if(empty($this->username) || empty($this->password)){
                $this->errorMessage = "Please fill all the fields!";
                return false;
            }else if(!$db->login()){
                $this->errorMessage = "Invalid username or password!";
                return false;
            }else{
                session::set('username',$this->username);
                header('Location: index.php');
                return true;
            }
        }
    }

    $validate_login = new validation_login();
    $validate_login->validate_login();

    echo "$validate_login->errorMessage";

?>

<?php 

    class database{

        //db_initialization
        private $HOST = 'localhost',
        $USERNAME = 'root',
        $PASSWORD = '',
        $DBNAME = 'auth',
        $connect;

        //db_insert
        private $usernameInput,
        $firstnameInput,
        $lastnameInput,
        $passwordInput,
        $hashedPassword;

        public function __construct(){
            $this->connect = new mysqli($this->HOST,$this->USERNAME,   
            $this->PASSWORD,$this->DBNAME) or die('connection error');
        }

        public function insert_data(){
            $sql = "INSERT INTO users 
            (username,first_name,last_name,password) VALUES (?,?,?,?)";
            if($statement = $this->connect->prepare($sql)){
                $this->usernameInput = input::get('user_val');
                $this->firstnameInput = input::get('first_name_val');
                $this->lastnameInput = input::get('last_name_val');
                $this->passwordInput = input::get('password_val');
                $this->hashedPassword = password_hash( $this->passwordInput,                 
                PASSWORD_DEFAULT);

                $statement->bind_param("ssss",$this->usernameInput,    
                $this- >firstnameInput,$this->lastnameInput,           
                $this->hashedPassword);
                $statement->execute();
            }
        }

        public function validate_same_username(){
            $sql_same_username = "SELECT username FROM users WHERE   
            username = ?";
            if($statement_same_username =                              
            $this->connect->prepare($sql_same_username)){                             
                $this->usernameInput = input::get('user_val');
                $statement_same_username->bind_param("s",              
                $this->usernameInput);
                $statement_same_username->execute();
                $result = $statement_same_username->get_result();
                $num_rows = $result->num_rows;

                if($num_rows > 0){
                    return false;
                }else{
                    return true;
                }
             }
         }

        public function login(){
            $sql_login = "SELECT username , password FROM users WHERE 
            username = ?";
            if($statement_login = $this->connect->prepare($sql_login)){

                $this->usernameInput = input::get('user_val');
                $this->passwordInput = input::get('password_val');

                $statement_login->bind_param("s",                     
                $this->usernameInput);
                $statement_login->execute();

                //get hashed password from database
                $statement_login->bind_result($username,$password);
                if(password_verify($this->passwordInput,$password)){
                    return true;
                }else{
                    return false;
                }
            }
        }
    }

?>

<?php 
    class session{

        public static function set($name,$value){
            return $name = $_SESSION[$value];
        }

        public static function get($name){
            return $_SESSION[$name];
        }

        public static function exists($name){
            if(isset($_SESSION[$name])){
                return true;
            }else{
                return false;
            }
        }

    }
?>

<?php 

    class input{

        public static function get($name){
            if(isset($_POST[$name])){
                return $_POST[$name];
            }else if(isset($_GET[$name])){
                return $_GET[$name];
            }else{
                return false;
            }
        }
    }
?>


$（文档）.ready（函数（）{
$（“#登录”）。单击（函数（事件）{
event.preventDefault（）；
var username=$（'#usernameID'）.val（）；
var password=$（'#passwordID'）.val（）；
$.post（“validation/validation\u login.php”{
user\u val:用户名，
密码值：密码，
}，函数（数据）{
$（'.error message'）.html（数据）；
});
});
});
登录
登录

验证\u login.php

<?php 
    require_once 'templates/header.php';
?>

<link rel="stylesheet" type="text/css" href="styles/login-style.css">

<script type="text/javascript" src="https://code.jquery.com/jquery- 
3.3.1.min.js"></script>

<script type="text/javascript">

$(document).ready(function(){
    $('#login').click(function(event){
        event.preventDefault();
        var username = $('#usernameID').val();
        var password = $('#passwordID').val();

        $.post("validation/validation_login.php",{
            user_val : username,
            password_val : password,

        },function(data){
            $('.error-message').html(data);
        });
    });
});

</script>

<title>Login</title>
<form>
    <h1>Login</h1>
    <input type="text" id="usernameID" name="username" 
    placeholder="Username" autocomplete="off"> <br>

    <input type="password" id="passwordID" name="password" 
    placeholder="Password" autocomplete="off"> <br>

    <input type="button" id="login" name="register-button" value="Login">

</form>

<div class="error-message">

</div>

<?php 
    require_once 'templates/footer.php';
?>

<?php 

    require_once '../classes/input.php';
    require_once '../classes/session.php';
    require_once '../classes/database.php';

    class validation_login{

        private $username,$password;
        public $errorMessage;

        public function validate_login(){
            $db = new database();
            $this->username = input::get('user_val');
            $this->password = input::get('password_val');

            if(empty($this->username) || empty($this->password)){
                $this->errorMessage = "Please fill all the fields!";
                return false;
            }else if(!$db->login()){
                $this->errorMessage = "Invalid username or password!";
                return false;
            }else{
                session::set('username',$this->username);
                header('Location: index.php');
                return true;
            }
        }
    }

    $validate_login = new validation_login();
    $validate_login->validate_login();

    echo "$validate_login->errorMessage";

?>

<?php 

    class database{

        //db_initialization
        private $HOST = 'localhost',
        $USERNAME = 'root',
        $PASSWORD = '',
        $DBNAME = 'auth',
        $connect;

        //db_insert
        private $usernameInput,
        $firstnameInput,
        $lastnameInput,
        $passwordInput,
        $hashedPassword;

        public function __construct(){
            $this->connect = new mysqli($this->HOST,$this->USERNAME,   
            $this->PASSWORD,$this->DBNAME) or die('connection error');
        }

        public function insert_data(){
            $sql = "INSERT INTO users 
            (username,first_name,last_name,password) VALUES (?,?,?,?)";
            if($statement = $this->connect->prepare($sql)){
                $this->usernameInput = input::get('user_val');
                $this->firstnameInput = input::get('first_name_val');
                $this->lastnameInput = input::get('last_name_val');
                $this->passwordInput = input::get('password_val');
                $this->hashedPassword = password_hash( $this->passwordInput,                 
                PASSWORD_DEFAULT);

                $statement->bind_param("ssss",$this->usernameInput,    
                $this- >firstnameInput,$this->lastnameInput,           
                $this->hashedPassword);
                $statement->execute();
            }
        }

        public function validate_same_username(){
            $sql_same_username = "SELECT username FROM users WHERE   
            username = ?";
            if($statement_same_username =                              
            $this->connect->prepare($sql_same_username)){                             
                $this->usernameInput = input::get('user_val');
                $statement_same_username->bind_param("s",              
                $this->usernameInput);
                $statement_same_username->execute();
                $result = $statement_same_username->get_result();
                $num_rows = $result->num_rows;

                if($num_rows > 0){
                    return false;
                }else{
                    return true;
                }
             }
         }

        public function login(){
            $sql_login = "SELECT username , password FROM users WHERE 
            username = ?";
            if($statement_login = $this->connect->prepare($sql_login)){

                $this->usernameInput = input::get('user_val');
                $this->passwordInput = input::get('password_val');

                $statement_login->bind_param("s",                     
                $this->usernameInput);
                $statement_login->execute();

                //get hashed password from database
                $statement_login->bind_result($username,$password);
                if(password_verify($this->passwordInput,$password)){
                    return true;
                }else{
                    return false;
                }
            }
        }
    }

?>

<?php 
    class session{

        public static function set($name,$value){
            return $name = $_SESSION[$value];
        }

        public static function get($name){
            return $_SESSION[$name];
        }

        public static function exists($name){
            if(isset($_SESSION[$name])){
                return true;
            }else{
                return false;
            }
        }

    }
?>

<?php 

    class input{

        public static function get($name){
            if(isset($_POST[$name])){
                return $_POST[$name];
            }else if(isset($_GET[$name])){
                return $_GET[$name];
            }else{
                return false;
            }
        }
    }
?>

database.php

<?php 
    require_once 'templates/header.php';
?>

<link rel="stylesheet" type="text/css" href="styles/login-style.css">

<script type="text/javascript" src="https://code.jquery.com/jquery- 
3.3.1.min.js"></script>

<script type="text/javascript">

$(document).ready(function(){
    $('#login').click(function(event){
        event.preventDefault();
        var username = $('#usernameID').val();
        var password = $('#passwordID').val();

        $.post("validation/validation_login.php",{
            user_val : username,
            password_val : password,

        },function(data){
            $('.error-message').html(data);
        });
    });
});

</script>

<title>Login</title>
<form>
    <h1>Login</h1>
    <input type="text" id="usernameID" name="username" 
    placeholder="Username" autocomplete="off"> <br>

    <input type="password" id="passwordID" name="password" 
    placeholder="Password" autocomplete="off"> <br>

    <input type="button" id="login" name="register-button" value="Login">

</form>

<div class="error-message">

</div>

<?php 
    require_once 'templates/footer.php';
?>

<?php 

    require_once '../classes/input.php';
    require_once '../classes/session.php';
    require_once '../classes/database.php';

    class validation_login{

        private $username,$password;
        public $errorMessage;

        public function validate_login(){
            $db = new database();
            $this->username = input::get('user_val');
            $this->password = input::get('password_val');

            if(empty($this->username) || empty($this->password)){
                $this->errorMessage = "Please fill all the fields!";
                return false;
            }else if(!$db->login()){
                $this->errorMessage = "Invalid username or password!";
                return false;
            }else{
                session::set('username',$this->username);
                header('Location: index.php');
                return true;
            }
        }
    }

    $validate_login = new validation_login();
    $validate_login->validate_login();

    echo "$validate_login->errorMessage";

?>

<?php 

    class database{

        //db_initialization
        private $HOST = 'localhost',
        $USERNAME = 'root',
        $PASSWORD = '',
        $DBNAME = 'auth',
        $connect;

        //db_insert
        private $usernameInput,
        $firstnameInput,
        $lastnameInput,
        $passwordInput,
        $hashedPassword;

        public function __construct(){
            $this->connect = new mysqli($this->HOST,$this->USERNAME,   
            $this->PASSWORD,$this->DBNAME) or die('connection error');
        }

        public function insert_data(){
            $sql = "INSERT INTO users 
            (username,first_name,last_name,password) VALUES (?,?,?,?)";
            if($statement = $this->connect->prepare($sql)){
                $this->usernameInput = input::get('user_val');
                $this->firstnameInput = input::get('first_name_val');
                $this->lastnameInput = input::get('last_name_val');
                $this->passwordInput = input::get('password_val');
                $this->hashedPassword = password_hash( $this->passwordInput,                 
                PASSWORD_DEFAULT);

                $statement->bind_param("ssss",$this->usernameInput,    
                $this- >firstnameInput,$this->lastnameInput,           
                $this->hashedPassword);
                $statement->execute();
            }
        }

        public function validate_same_username(){
            $sql_same_username = "SELECT username FROM users WHERE   
            username = ?";
            if($statement_same_username =                              
            $this->connect->prepare($sql_same_username)){                             
                $this->usernameInput = input::get('user_val');
                $statement_same_username->bind_param("s",              
                $this->usernameInput);
                $statement_same_username->execute();
                $result = $statement_same_username->get_result();
                $num_rows = $result->num_rows;

                if($num_rows > 0){
                    return false;
                }else{
                    return true;
                }
             }
         }

        public function login(){
            $sql_login = "SELECT username , password FROM users WHERE 
            username = ?";
            if($statement_login = $this->connect->prepare($sql_login)){

                $this->usernameInput = input::get('user_val');
                $this->passwordInput = input::get('password_val');

                $statement_login->bind_param("s",                     
                $this->usernameInput);
                $statement_login->execute();

                //get hashed password from database
                $statement_login->bind_result($username,$password);
                if(password_verify($this->passwordInput,$password)){
                    return true;
                }else{
                    return false;
                }
            }
        }
    }

?>

<?php 
    class session{

        public static function set($name,$value){
            return $name = $_SESSION[$value];
        }

        public static function get($name){
            return $_SESSION[$name];
        }

        public static function exists($name){
            if(isset($_SESSION[$name])){
                return true;
            }else{
                return false;
            }
        }

    }
?>

<?php 

    class input{

        public static function get($name){
            if(isset($_POST[$name])){
                return $_POST[$name];
            }else if(isset($_GET[$name])){
                return $_GET[$name];
            }else{
                return false;
            }
        }
    }
?>

session.php

<?php 
    require_once 'templates/header.php';
?>

<link rel="stylesheet" type="text/css" href="styles/login-style.css">

<script type="text/javascript" src="https://code.jquery.com/jquery- 
3.3.1.min.js"></script>

<script type="text/javascript">

$(document).ready(function(){
    $('#login').click(function(event){
        event.preventDefault();
        var username = $('#usernameID').val();
        var password = $('#passwordID').val();

        $.post("validation/validation_login.php",{
            user_val : username,
            password_val : password,

        },function(data){
            $('.error-message').html(data);
        });
    });
});

</script>

<title>Login</title>
<form>
    <h1>Login</h1>
    <input type="text" id="usernameID" name="username" 
    placeholder="Username" autocomplete="off"> <br>

    <input type="password" id="passwordID" name="password" 
    placeholder="Password" autocomplete="off"> <br>

    <input type="button" id="login" name="register-button" value="Login">

</form>

<div class="error-message">

</div>

<?php 
    require_once 'templates/footer.php';
?>

<?php 

    require_once '../classes/input.php';
    require_once '../classes/session.php';
    require_once '../classes/database.php';

    class validation_login{

        private $username,$password;
        public $errorMessage;

        public function validate_login(){
            $db = new database();
            $this->username = input::get('user_val');
            $this->password = input::get('password_val');

            if(empty($this->username) || empty($this->password)){
                $this->errorMessage = "Please fill all the fields!";
                return false;
            }else if(!$db->login()){
                $this->errorMessage = "Invalid username or password!";
                return false;
            }else{
                session::set('username',$this->username);
                header('Location: index.php');
                return true;
            }
        }
    }

    $validate_login = new validation_login();
    $validate_login->validate_login();

    echo "$validate_login->errorMessage";

?>

<?php 

    class database{

        //db_initialization
        private $HOST = 'localhost',
        $USERNAME = 'root',
        $PASSWORD = '',
        $DBNAME = 'auth',
        $connect;

        //db_insert
        private $usernameInput,
        $firstnameInput,
        $lastnameInput,
        $passwordInput,
        $hashedPassword;

        public function __construct(){
            $this->connect = new mysqli($this->HOST,$this->USERNAME,   
            $this->PASSWORD,$this->DBNAME) or die('connection error');
        }

        public function insert_data(){
            $sql = "INSERT INTO users 
            (username,first_name,last_name,password) VALUES (?,?,?,?)";
            if($statement = $this->connect->prepare($sql)){
                $this->usernameInput = input::get('user_val');
                $this->firstnameInput = input::get('first_name_val');
                $this->lastnameInput = input::get('last_name_val');
                $this->passwordInput = input::get('password_val');
                $this->hashedPassword = password_hash( $this->passwordInput,                 
                PASSWORD_DEFAULT);

                $statement->bind_param("ssss",$this->usernameInput,    
                $this- >firstnameInput,$this->lastnameInput,           
                $this->hashedPassword);
                $statement->execute();
            }
        }

        public function validate_same_username(){
            $sql_same_username = "SELECT username FROM users WHERE   
            username = ?";
            if($statement_same_username =                              
            $this->connect->prepare($sql_same_username)){                             
                $this->usernameInput = input::get('user_val');
                $statement_same_username->bind_param("s",              
                $this->usernameInput);
                $statement_same_username->execute();
                $result = $statement_same_username->get_result();
                $num_rows = $result->num_rows;

                if($num_rows > 0){
                    return false;
                }else{
                    return true;
                }
             }
         }

        public function login(){
            $sql_login = "SELECT username , password FROM users WHERE 
            username = ?";
            if($statement_login = $this->connect->prepare($sql_login)){

                $this->usernameInput = input::get('user_val');
                $this->passwordInput = input::get('password_val');

                $statement_login->bind_param("s",                     
                $this->usernameInput);
                $statement_login->execute();

                //get hashed password from database
                $statement_login->bind_result($username,$password);
                if(password_verify($this->passwordInput,$password)){
                    return true;
                }else{
                    return false;
                }
            }
        }
    }

?>

<?php 
    class session{

        public static function set($name,$value){
            return $name = $_SESSION[$value];
        }

        public static function get($name){
            return $_SESSION[$name];
        }

        public static function exists($name){
            if(isset($_SESSION[$name])){
                return true;
            }else{
                return false;
            }
        }

    }
?>

<?php 

    class input{

        public static function get($name){
            if(isset($_POST[$name])){
                return $_POST[$name];
            }else if(isset($_GET[$name])){
                return $_GET[$name];
            }else{
                return false;
            }
        }
    }
?>

input.php

<?php 
    require_once 'templates/header.php';
?>

<link rel="stylesheet" type="text/css" href="styles/login-style.css">

<script type="text/javascript" src="https://code.jquery.com/jquery- 
3.3.1.min.js"></script>

<script type="text/javascript">

$(document).ready(function(){
    $('#login').click(function(event){
        event.preventDefault();
        var username = $('#usernameID').val();
        var password = $('#passwordID').val();

        $.post("validation/validation_login.php",{
            user_val : username,
            password_val : password,

        },function(data){
            $('.error-message').html(data);
        });
    });
});

</script>

<title>Login</title>
<form>
    <h1>Login</h1>
    <input type="text" id="usernameID" name="username" 
    placeholder="Username" autocomplete="off"> <br>

    <input type="password" id="passwordID" name="password" 
    placeholder="Password" autocomplete="off"> <br>

    <input type="button" id="login" name="register-button" value="Login">

</form>

<div class="error-message">

</div>

<?php 
    require_once 'templates/footer.php';
?>

<?php 

    require_once '../classes/input.php';
    require_once '../classes/session.php';
    require_once '../classes/database.php';

    class validation_login{

        private $username,$password;
        public $errorMessage;

        public function validate_login(){
            $db = new database();
            $this->username = input::get('user_val');
            $this->password = input::get('password_val');

            if(empty($this->username) || empty($this->password)){
                $this->errorMessage = "Please fill all the fields!";
                return false;
            }else if(!$db->login()){
                $this->errorMessage = "Invalid username or password!";
                return false;
            }else{
                session::set('username',$this->username);
                header('Location: index.php');
                return true;
            }
        }
    }

    $validate_login = new validation_login();
    $validate_login->validate_login();

    echo "$validate_login->errorMessage";

?>

<?php 

    class database{

        //db_initialization
        private $HOST = 'localhost',
        $USERNAME = 'root',
        $PASSWORD = '',
        $DBNAME = 'auth',
        $connect;

        //db_insert
        private $usernameInput,
        $firstnameInput,
        $lastnameInput,
        $passwordInput,
        $hashedPassword;

        public function __construct(){
            $this->connect = new mysqli($this->HOST,$this->USERNAME,   
            $this->PASSWORD,$this->DBNAME) or die('connection error');
        }

        public function insert_data(){
            $sql = "INSERT INTO users 
            (username,first_name,last_name,password) VALUES (?,?,?,?)";
            if($statement = $this->connect->prepare($sql)){
                $this->usernameInput = input::get('user_val');
                $this->firstnameInput = input::get('first_name_val');
                $this->lastnameInput = input::get('last_name_val');
                $this->passwordInput = input::get('password_val');
                $this->hashedPassword = password_hash( $this->passwordInput,                 
                PASSWORD_DEFAULT);

                $statement->bind_param("ssss",$this->usernameInput,    
                $this- >firstnameInput,$this->lastnameInput,           
                $this->hashedPassword);
                $statement->execute();
            }
        }

        public function validate_same_username(){
            $sql_same_username = "SELECT username FROM users WHERE   
            username = ?";
            if($statement_same_username =                              
            $this->connect->prepare($sql_same_username)){                             
                $this->usernameInput = input::get('user_val');
                $statement_same_username->bind_param("s",              
                $this->usernameInput);
                $statement_same_username->execute();
                $result = $statement_same_username->get_result();
                $num_rows = $result->num_rows;

                if($num_rows > 0){
                    return false;
                }else{
                    return true;
                }
             }
         }

        public function login(){
            $sql_login = "SELECT username , password FROM users WHERE 
            username = ?";
            if($statement_login = $this->connect->prepare($sql_login)){

                $this->usernameInput = input::get('user_val');
                $this->passwordInput = input::get('password_val');

                $statement_login->bind_param("s",                     
                $this->usernameInput);
                $statement_login->execute();

                //get hashed password from database
                $statement_login->bind_result($username,$password);
                if(password_verify($this->passwordInput,$password)){
                    return true;
                }else{
                    return false;
                }
            }
        }
    }

?>

<?php 
    class session{

        public static function set($name,$value){
            return $name = $_SESSION[$value];
        }

        public static function get($name){
            return $_SESSION[$name];
        }

        public static function exists($name){
            if(isset($_SESSION[$name])){
                return true;
            }else{
                return false;
            }
        }

    }
?>

<?php 

    class input{

        public static function get($name){
            if(isset($_POST[$name])){
                return $_POST[$name];
            }else if(isset($_GET[$name])){
                return $_GET[$name];
            }else{
                return false;
            }
        }
    }
?>

看起来您正在将

用户\u val

添加到validation\u login.php的密码字段中

$this->password=input:：get（'user_val'）

根据您的代码，它应该是

$this->password=input:：get（'password_val'）
我将开始换成这一行
编辑我的初始答案：
您也不能使用密码\u hash（）
（请参阅返回值部分）来检查密码是否相等，您需要使用来检查登录函数中的密码是否相等
更改查询以从数据库获取哈希密码，然后将其与用户输入的密码进行比较，并使用密码\u验证
        $sql_login = "SELECT username , password FROM users WHERE 
        username = ? ";

        if(password_verify($this->passwordInput,$hashedPasswordFromDB)){
            return true;
        }else{
            return false;
        }

还要检查数据库中的password
列是否足够长，以存储整个密码长度，并确保您的用户名是唯一的
您在注册时使用的是hashedpassword
，但在登录时不使用hashedpassword，它永远不会成功进行身份验证。@amopt我已经尝试过了，但这并不重要。请使用您正在使用的新代码更新您问题中的代码：1）在身份验证时对密码进行哈希运算，2）按照Ron的回答，在验证登录时使用password\u val
而不是user\u val
。php@AmmoPT代码更新，但是仍然不起作用。你能访问database.php吗？user\u val=user&password\u val=password
（用有效的、存在的数据替换user
和password
）并且在login（）
上你能var\u dump（$this->usernameInput）
和var\u dump（$this->hashedPassword）
，在它们被定义之后。它不会显示任何错误，但在我尝试登录时仍然无法正确验证。我输入了正确的用户名和密码，但它仍然验证我输入了错误的用户名或密码。我将检查输入是否符合您在login（）
echo$this->usernameInput=input:：get（'user_val'）中的期望；echo$this->passwordInput=input:：get（'password_val'）
和echo$this->hashedPassword我已经检查过了，输入是我期望的。但是，如果我对密码进行哈希运算，它似乎不起作用。你知道如何使用哈希密码正确登录系统吗？我已经更新了数据库.php的login（）
函数，请检查。使用bind_param
函数$sql_login=“从username=？”中选择用户名、密码，可以在同一查询中获得多个列
和$statement\u login->bind\u param（“ss”，$hashedPasswordFromDB）
然后user$hashedPasswordFromDB
验证密码