php php在isset或empty中非法偏移类型
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php Illegal offset type in isset or empty
提问by user3383540
I have this code that was working initially, but does not work after I restarted my computer.
我有这段代码最初可以工作，但在我重新启动计算机后不起作用。
The error I am getting is:
我得到的错误是：
Warning: Illegal offset type in isset or empty in D:\xampp\htdocs\cookieboylive\classes\Session.php on line 4
警告：第 4 行 D:\xampp\htdocs\cookieboylive\classes\Session.php 中的 isset 或空的偏移类型非法
There's 3 files on my site - Index, Login, Register. Index page checks if users is logged in, but I don't think it has anything to do with the problem.
我的网站上有 3 个文件 - 索引、登录、注册。索引页面检查用户是否登录，但我认为这与问题无关。
Here's the current code:
这是当前的代码：
The main register/login.php page
主 register/login.php 页面
require_once 'core/init.php';
if(Input::exists()) {
if(Token::check(Input::get('token'))) {
$validate = new Validate();
$validation = $validate->check($_POST, array(
'username' => array('required' => true),
'password' => array('required' => true)
));
if($validation->passed()) {
$user = new User();
$login = $user->login(Input::get('username'), Input::get('password'));
if($login) {
Redirect::to('index.php');
} else {
echo '<p>Sorry, login failed.</p>';
}
} else {
foreach($validation->errors() as $error) {
echo $error, '<br>';
}
}
}
}
if(Input::exists()) {
if(Token::check(Input::get('token'))) {
$validate = new Validate();
$validation = $validate->check($_POST, array(
'username' => array(
'required' => true,
'min' => 2,
'max' => 20,
'unique' => 'users'
),
'password' => array(
'required' => true,
'min' => 6
),
'password_again' => array(
'required' => true,
'matches' => 'password'
),
'name' => array(
'required' => true,
'min' => 2,
'max' => 50
)
));
if($validation->passed()) {
$user = new User();
$salt = Hash::salt(32);
try {
$user->create(array(
'username' => Input::get('username'),
'password' => Hash::make(Input::get('password'), $salt),
'salt' => $salt,
'name' => Input::get('name'),
'joined' => date('Y-m-d H:i:s'),
'group' => 1
));
Session::flash('home', 'Register SUCCESS');
Redirect::to('index.php');
} catch(Exception $e) {
die($e->getMessage());
}
} else {
foreach($validation->errors() as $error) {
echo $error, '<br>';
}
}
}
}
?>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" type="text/css" href="styles/register_login_styles.css">
<link rel="stylesheet" type="text/css" href="styles/animate-custom.css">
</head>
<body>
<div class="container">
<div id="container_demo" >
<a class="hiddenanchor" id="toregister"></a>
<a class="hiddenanchor" id="tologin"></a>
<div id="wrapper">
<div id="login" class="animate form">
<form action="" method="post">
<div class="field">
<h1>Log in</h1>
<p>
<label for="username" class="uname" data-icon="u" >Username </label>
<input id="username" name="username" required="required" type="text" placeholder="Username" autocomplete="off">
</p>
<p>
<label for="password" class="youpasswd" data-icon="p">Password </label>
<input id="password" name="password" required="required" type="password" placeholder="Password">
</p>
<p class="keeplogin">
<input type="checkbox" name="loginkeeping" id="loginkeeping" value="loginkeeping">
<label for="loginkeeping">Keep me logged in</label>
</p>
<input type="hidden" name="token" value="<?php echo Token::generate(); ?>">
<p class="login button">
<input type="submit" value="Login">
</p>
<p class="change_link">
Not a member yet ?
<a href="#toregister" class="to_register">Join us</a>
</p>
</form>
</div>
</div>
<div id="register" class="animate form">
<form action="" method="post">
<h1> Sign up </h1>
<p>
<label for="username" class="uname" data-icon="u">Username</label>
<input id="username" value="<?php echo escape(Input::get('username')); ?>" name="username" required="required" type="text" placeholder="Username" autocomplete="off">
</p>
<p>
<label for="password" class="youpasswd" data-icon="p">Your password </label>
<input id="password" name="password" required="required" type="password" placeholder="Password">
</p>
<p>
<label for="password_again" class="youpasswd" data-icon="p">Please confirm your password </label>
<input id="password_again" name="password_again" required="required" type="password" placeholder="Password again">
</p>
<p>
<label for="name" class="youmail" data-icon="n" >Name</label>
<input id="name" name="name" value="<?php echo escape(Input::get('name')); ?>" required="required" type="text" placeholder="Name" autocomplete="off">
</p>
<input type="hidden" name="token" value="<?php echo Token::generate(); ?>">
<p class="signin button">
<input type="submit" value="Sign up">
</p>
<p class="change_link">
Already a member ?
<a href="#tologin" class="to_register"> Go and log in </a>
</p>
</form>
</div>
</div>
</div>
</div>
</body>
</html>
Session.php
会话文件
<?php
class Session {
public static function exists($name) {
return (isset($_SESSION[$name])) ? true : false;
}
public static function put($name, $value) {
return $_SESSION[$name] = $value;
}
public static function get($name) {
return $_SESSION[$name];
}
public static function delete($name) {
if(self::exists($name)) {
unset($_SESSION[$name]);
}
}
public static function flash($name, $string = '') {
if(self::exists($name)) {
$session = self::get($name);
self::delete($name);
return $session;
} else {
self::put($name, $string);
}
}
}
User.php
用户名
<?php
class User {
private $_db,
$_data,
$_sessionName,
$_isLoggedIn;
public function __construct($user = null) {
$this->_db = DB::getInstance();
$this->_sessionName = Config::get('session/session_name');
if(!$user) {
if(Session::exists($this->_sessionName)) {
$user = Session::get($this->_sessionName);
if($this->find($user)) {
$this->_isLoggedIn = true;
} else {
// Pr0cess logout
}
} else {
$this->find($user);
}
}
}
public function create($fields = array()) {
if(!$this->_db->insert('users', $fields)) {
throw new Exception('There was a problem creating an account.');
}
}
public function find($user = null) {
if($user) {
$field = (is_numeric($user)) ? 'id' : 'username';
$data = $this->_db->get('users', array($field, '=', $user));
if($data->count()) {
$this->_data = $data->first();
return true;
}
}
return false;
}
public function login($username = null, $password = null) {
$user = $this->find($username);
if($user) {
if($this->data()->password === Hash::make($password, $this->data()->salt)) {
Session::put($this->_sessionName, $this->data()->id);
return true;
}
}
return false;
}
public function data() {
return $this->_data;
}
public function isLoggedIn() {
return $this->_isLoggedIn;
}
}
回答by KCT3937
I tried most of the solutions suggested above. In actual fact the answer is not in the spelling but is in the fact that, as was pointed out above, the $name variable in the exists function is actually an array.
我尝试了上面建议的大多数解决方案。事实上，答案并不在于拼写，而是在于，正如上面所指出的，exists 函数中的 $name 变量实际上是一个数组。
public static function exists($name) {
return (isset($_SESSION[$name])) ? true : false;
}
public static function exists($name) {
return (isset($_SESSION[$name])) ? true : false;
}
The simple fix is to append [0] to [$name] so it becomes [$name][0] which returns the value associated with it and the one you want to see. Works for me. Why it worked in the video, I can't figure out; may be a configuration thing.
简单的解决方法是将 [0] 附加到 [$name] 使其成为 [$name][0] ，它返回与其关联的值以及您想要查看的值。为我工作。为什么它在视频中起作用，我想不通；可能是配置问题。
回答by deceze
I'm getting Fatal error: DEBUG: array ...
我收到致命错误：调试：数组...
That means $nameis an array, which is obviously an illegal string offset. $_SESSION[array()]does not work. Make sure you're passing the right value to Session::exists().
这意味着$name是一个数组，这显然是一个非法的字符串偏移量。$_SESSION[array()]不起作用。确保您将正确的值传递给Session::exists().
回答by Jan Hannibalsen
I recognize the context you are dealing with, a tutorial PHP login/registration project from Skillfeed. In fact I had the very same error that led me to a google search on the same error - I ended on this stackoverflow thread by You.
我认识您正在处理的上下文，来自 Skillfeed 的教程 PHP 登录/注册项目。事实上，我遇到了同样的错误，导致我在同一错误上进行了谷歌搜索 - 我在 You 的这个 stackoverflow 线程上结束了。
I couldn't find the answers very helpful but I looked through the classes of my project and I found the source of my problem in another class than your 3 classes shown in here.
我找不到非常有帮助的答案，但我浏览了我的项目的课程，我在另一个课程中找到了我的问题的根源，而不是这里显示的 3 个课程。
That is in Token.php :
那是在 Token.php 中：
public static function check($token){
$tokenName = Config::get('sesson/token_name');
if(Session::exists($tokenName) && $token === Session::get($tokenName)){
Session::delete($tokenName);
return true;
}
return false;
}
The problem was a simple misspelling , notice the get() function with its string parameter 'sesson/token_name', it should have been 'session/token_name'. Once I fixed this it worked for me!
问题是一个简单的拼写错误，注意 get() 函数及其字符串参数“sesson/token_name”，它应该是“session/token_name”。一旦我解决了这个问题，它就对我有用！
