大家好，
我试图弄清楚为什么我的脚本会重定向到我的登录页面。到目前为止，我还没有找到它。有人可以向我解释我犯的错误吗？ 这是我的代码。
的functions.php
function redirect_to($location = NULL) {
if ($location != NULL) {
header("Location: {$location}");
exit;
}
}
function include_layout_template($template="") {
include(SITE_ROOT.DS.'public'.DS.'layouts'.DS.$template);
}
的index.php
<?php
require_once('../../includes/initialize.php'); ?>
<?php if (!$session->is_logged_in()) { redirect_to("login.php"); } ?>
<?php include_layout_template("admin_header.php"); ?>
<a href="logout.php">Logout</a>
<?php include_layout_template("admin_footer.php"); ?>
session.php文件
<?php
class Session {
public $logged_in = false;
public $user_id;
public $message;
function __construct() {
session_start();
$this->check_message();
$this->check_login();
if($this->logged_in) {
// actions to take right away if user is logged in
} else {
// actions to take right away if user is not logged in
}
}
public function login_user($user) {
if($user) {
$this->user_id = $_SESSION['user_id'] = $user->id;
$this->logged_in = true;
}
}
public function is_logged_in() {
return $this->logged_in;
}
public function logout() {
unset($_SESSION['user_id']);
unset($this->user_id);
$this->logged_in = false;
}
private function check_login() {
if(isset($_SESSION['user_id'])) {
$this->user_id = $_SESSION['user_id'];
$this->logged_in = true;
} else {
unset($this->user_id);
$this->logged_in = false;
}
}
private function check_message() {
// Is there a message stored in the session?
if(isset($_SESSION['message'])) {
// Add it as an attribute and erase the stored version
$this->message = $_SESSION['message'];
unset($_SESSION['message']);
} else {
$this->message = "";
}
}
}
$session = new Session();
//$message = $session->message();
user.php的
<?php
require_once('../../includes/initialize.php');
class Users extends DatabaseQuery
{
protected $tablename = 'users';
protected $db_fields = array('id', 'first_name', 'last_name', 'password', 'username');
public $id;
public $first_name;
public $last_name;
public $password;
public $username;
public static function create_user($first_name, $last_name, $password, $username)
{
global $database;
$sql = "INSERT INTO users (";
$sql .= "first_name, last_name, password, username) ";
$sql .= "VALUES (";
$sql .= "'{$first_name}', '{$last_name}', '{$password}', '{$username}')";
$result = $database->query($sql);
return $result;
}
public static function find_username($username) {
global $database;
$sql = "SELECT * FROM users ";
$sql .= "WHERE username= '{$username}' ";
$sql .= "LIMIT 1";
$result = $database->query($sql);
$admin = mysqli_fetch_assoc($result);
return $admin;
}
public static function find_password($username, $password) {
global $database;
$sql = "SELECT * FROM users ";
$sql .= "WHERE username= '{$username}' ";
$sql .= "And password=".crypt($password) ;
$sql .= " LIMIT 1";
$result = $database->query($sql);
$admin = mysqli_fetch_assoc($result);
return $admin;
}
public static function password_check($password, $existing_hash) {
$hash = crypt($password, $existing_hash);
if ($hash === $existing_hash) {
return true;
} else {
return false;
}
}
public static function login($username, $password) {
$admin = self::find_username($username);
if ($admin) {
// found username, check password.
if (self::password_check($password, $admin['password'])) {
//password matches
return $admin;
} else {
//password does not match
return false;
}
} else {
// admin not found
return false;
}
}
}
$user = new Users();
的login.php
<?php
/**
* FIRSTNAME LASTNAME PASSWORD USERNAME
* Coos Wolff secret Admin
* Kevin Doofus password Kevin
*/
include_once("../../includes/initialize.php");
if (isset($_POST['submit'])) {
$username = $_POST['username'];
$password = $_POST['password'];
$first_name = $_POST['first_name'];
$last_name = $_POST['last_name'];
$login = Users::login($username, $password);
if($login) {
$session->logged_in = true;
redirect_to('index.php');
} else {
redirect_to('login.php');
}
} ?>
<form id='login' action='create_user.php' method='post' accept-charset='UTF-8'>
<fieldset >
<legend>Create User</legend>
<input type='hidden' name='submitted' id='submitted' value='1'/>
<label for='username' >UserName:</label>
<input type='text' name='username' id='username' maxlength="50" />
<label for='password' >Password:</label>
<input type='password' name='password' id='password' maxlength="50" />
<label for='firstName' >FirstName:</label>
<input type='text' name='first_name' id='first_name' maxlength="50" />
<label for='lastName' >LastName:</label>
<input type='text' name='last_name' id='last_name' maxlength="50" />
<input type='submit' name='submit' value='Submit' />
</fieldset>
</form>
<hr /><br /><hr />
<form id='login' action='login.php' method='post' accept-charset='UTF-8'>
<fieldset >
<legend>Login</legend>
<input type='hidden' name='submitted' id='submitted' value='1'/>
<label for='username' >UserName:</label>
<input type='text' name='username' id='username' maxlength="50" VALUE="Kevin"/>
<label for='password' >Password:</label>
<input type='password' name='password' id='password' maxlength="50" />
<label for='firstName' >FirstName:</label>
<input type='text' name='first_name' id='first_name' maxlength="50" value="Kevin" />
<label for='lastName' >LastName:</label>
<input type='text' name='last_name' id='last_name' maxlength="50" value="Doofus"/>
<input type='submit' name='submit' value='Submit' />
</fieldset>
</form>
如果我提交没有代码的表单来检查是否有人登录，则代码工作正常。但是通过检查代码，它会将我重定向到登录页面。提交表单后，我设置$ session-＆gt; logged_in = true。但仍然没有。我看谷歌看看我做错了什么。但我无法弄明白。我尝试了许多不同的代码，但它们都以同样的方式结束。将我重定向到登录页面。这可能很容易解决。但我无法看到它。有人能告诉我我做错了吗？
亲切的问候， 库斯
答案 0 :(得分：0)
如果省略返回值，则返回NULL值。
public function is_logged_in() {
// Add the return statement
return $this->logged_in;
}
它返回NULL，这是一个＆＃34; falsy＆＃34;价值因此您的支票认为它没有登录。