因此在登录我的网站后调试会话数组后，我发现在发布表单时，所有会话数据都会丢失。调用 updateDetails 和 changePassword 方法时会擦除会话数据。 为什么会这样？
我使用以下代码检查POST请求：
if（$ _ SERVER ['REQUEST_METHOD'] =='POST'）{ }
只发生一次：一旦会话丢失，可以调用这些方法，而不会再出现问题（直到他们通过到期或关闭浏览器而失去会话）。
index.php（part）
session_start();
$page = $_GET['p'];
$query = $_GET['q'];
$req = $_GET['req'];
$user = new User();
switch($page) {
case 'account':
if($req=="logout") {
if($user->isLoggedIn())
$user->logout();
header("Location: /?p=account");
exit();
}
else if($req=="signup") {
if($user->isLoggedIn()) {
header("Location: /?p=account");
exit();
}
else {
if($_SERVER['REQUEST_METHOD'] == 'POST') {
$form_data = array('username' => $_POST['username'],
'password' => $_POST['password'],
'password_repeat' => $_POST['password_repeat'],
'title' => $_POST['title'],
'first_name' => $_POST['first_name'],
'surname' => $_POST['surname'],
'dob_day' => $_POST['dob_day'],
'dob_month' => $_POST['dob_month'],
'dob_year' => $_POST['dob_year'],
'gender' => $_POST['gender'],
'email' => strtolower($_POST['email']),
'email_repeat' => strtolower($_POST['email_repeat']));
if($user->signup($form_data)) {
header("Location: /?p=account");
exit();
}
}
}
}
else {
if($user->isLoggedIn()==true) {
if($_SERVER['REQUEST_METHOD'] == 'POST') {
if($req=='editdetails') {
$form_data = array(
'title' => $_POST['title'],
'first_name' => $_POST['first_name'],
'surname' => $_POST['surname'],
'gender' => $_POST['gender'],
'phone' => $_POST['phone'],
'email' => strtolower($_POST['email']),
'password' => $_POST['password']
);
if($user->updateDetails($form_data)) {
header("Location: /?p=account");
exit();
}
}
else if($req=='changepassword') {
$form_data = array(
'old_password' => $_POST['old_password'],
'password' => $_POST['password'],
'password_repeat' => $_POST['password_repeat'],
);
if($user->changePassword($form_data)) {
header("Location: /?p=account");
exit();
}
}
}
$user->retrieveUserDetails();
$details=$user->getUserDetails();
}
else {
if($req) {
header("Location: /?p=account");
exit();
}
else if($_SERVER['REQUEST_METHOD'] == 'POST') {
$form_data = array('username' => $_POST['username'], 'password' => $_POST['password']);
if($user->login($form_data)) {
$user->retrieveUserDetails();
$details=$user->getUserDetails();
}
}
}
}
break;
}
user.php（part）
class User {
private $auth;
private $details;
private $session_alert;
function User() {
if(isset($_SESSION['alert']))
$this->session_alert = $_SESSION['alert'];
$this->auth = isset($_SESSION['auth']) ? $_SESSION['auth'] : null;
if(isset($this->auth)) {
$database= new Database;
if($database->checkUserSession($this->auth['user_id'],session_id())) {
$this->logged_in=true;
}
else {
$this->addSessionAlert('global','Your login session has possibly timed out, you may login again by <a href="/?p=account">clicking here</a>.',true);
unset($_SESSION['auth']);
}
}
}
function login($data) {
$return = false;
$this->form = new Form($data,0);
if(!$this->form->getError()) {
$database= new Database;
$error_msg = "The username/password entered was invalid. Please check to see if they are correct and try again, or use the relevant links to recover your account.";
$salt = $database->getSaltByUsername($data['username']);
if($salt) {
$hash = $this->hashpwd($data['password'],$salt);
// Do login
$this->auth = array();
$this->auth['user_id'] = $database->checkUserByHash($data['username'],$hash);
if($this->auth['user_id']) {
session_regenerate_id();
if($database->doLogin($this->auth['user_id'],session_id())) {
$details=$database->getUserDetailsById($this->auth['user_id']);
$this->auth['first_name'] = $details['first_name'];
$_SESSION['auth']=$this->auth;
$this->logged_in=true;
$return = true;
}
else
$this->form->pushError('Something went wrong, please try again.');
}
else
$this->form->pushError($error_msg);
}
else
$this->form->pushError($error_msg);
}
return $return;
}
function logout() {
$return = false;
if(isset($this->auth)) {
$database= new Database;
if($database->clearUserSession($this->auth['user_id'],session_id())) {
unset($_SESSION['auth']);
$this->logged_in=false;
session_regenerate_id();
$return = true;
}
}
return $return;
}
function signup($data) {
$return = false;
$this->form = new Form($data,1);
if(!$this->form->getError()) {
$database= new Database;
if($database->checkUserByUsername($data['username']))
$this->form->pushError("The username entered already exists, please try again.");
else if($database->checkUserByEmail($data['email']))
$this->form->pushError("The e-mail address entered is already in use, please try again.");
else {
$dbarray = $data;
unset($dbarray['password'],$dbarray['password_repeat'],$dbarray['dob_month'],$dbarray['dob_day'],$dbarray['dob_year']);
$dbarray['dob']=date("Y-m-d", mktime(0,0,0,$data['dob_month'], $data['dob_day'], $data['dob_year']));
$dbarray['salt']=strtoupper(md5(mt_rand()));
$dbarray['hash'] = $this->hashpwd($data['password'],$dbarray['salt']);
// Do signup
$this->auth = array();
$this->auth['user_id'] = $database->newUser($dbarray);
if($this->auth['user_id']) {
session_regenerate_id();
if($database->doLogin($this->auth['user_id'],session_id())) {
$details=$database->getUserDetailsById($this->auth['user_id']);
$this->auth['first_name'] = $details['first_name'];
$_SESSION['auth']=$this->auth;
$this->logged_in=true;
}
$return=true;
}
else {
$this->form->pushError("Something went wrong, please try again.");
}
}
}
return $return;
}
function updateDetails($data) {
$return = false;
$this->form = new Form($data,2);
if(!$this->form->getError()) {
$database= new Database;
if( $database->checkUserByEmailNotById($data['email'],$this->auth['user_id']) ) {
$this->form->pushError("The e-mail address entered is already in use, please try again.");
}
else {
$salt = $database->getSaltById($this->auth['user_id']);
if($salt) {
$hash = $this->hashpwd($data['password'],$salt);
if($database->checkUserIdByHash($this->auth['user_id'],$hash)) {
$database->updateUserById($this->auth['user_id'],$data);
$return = true;
}
else
$this->form->pushError("The password entered was incorrect, please try again.");
}
}
}
return $return;
}
function changePassword($data) {
$return = false;
$this->form = new Form($data,3);
if(!$this->form->getError()) {
$database= new Database;
$salt = $database->getSaltById($this->auth['user_id']);
if($salt) {
$hash = $this->hashpwd($data['old_password'],$salt);
if($database->checkUserIdByHash($this->auth['user_id'],$hash)) {
$salt=strtoupper(md5(mt_rand()));
$hash = $this->hashpwd($data['password'],$salt);
if($database->updateSaltHashById($this->auth['user_id'],$salt,$hash)) $this->addSessionAlert('yourdetails','Your password has been changed successfully.',false);
$return = true;
}
else
$this->form->pushError("The old password entered was incorrect, please try again.");
}
}
return $return;
}
function isLoggedIn() {
return $this->logged_in;
}
function getUserDetails() {
return $this->details;
}
}
答案 0 :(得分：2)
在类的构造函数方法中启动会话，听起来不太好。
使用index.php页面顶部的session_start();代替。
答案 1 :(得分：0)
在您要使用会话的每个页面中，您必须调用session_start（）;
答案 2 :(得分：0)
见这里：
http://codex.wordpress.org/Function_Reference/wp_update_user
注意：如果正在更新当前用户的密码，则为cookie 将被清除！
现在，为什么 WordPress会这样做并不清楚，但明确指出，通过wp_update_user()设置密码时，将删除Cookie以及会话。
有些人发现在设置密码后重定向后立即应用exit();会阻止Cookie丢失。