更新: 在迁移到共享主机时,我试图解决这个问题。我在这里找到了会话管理的原始代码 - http://www.wikihow.com/Create-a-Secure-Session-Management-System-in-PHP-and-MySQL
最后我简单地用这个替换了我的课程,然后它开始工作了,尽管如此,我很确定,我没有改变它开始。但后来我开始遇到问题。在家庭服务器上一切正常,但在共享主机上,每个页面显示错误503.如果我刷新了几次,我得到相同的错误如下。出于好奇,我转而使用PHP的原生会话管理......它正常工作。所以我的猜测就是这个问题发生了,因为某些原因导致类无法及时连接到DB。在所有会话类都有一些调用之后。
问题是 - 是否有一种方法可以使用自定义类,但如果失败则能够恢复为原生类?
当准备将我的网站从本地PC移动到托管时,我遇到了一些“子网站”的问题。它具有基于用于在DB中存储会话的公共功能的认证系统。在某些时候(我不确定哪个)它停止了正常工作。
因此,当我输入错误的登录名或密码时,网站会按预期运行,并收到错误消息。由于证明了对数据库的详细信息,因此建立了与数据库的连接。但是当我输入正确的页面时 - 页面刷新就像登录成功一样,但它仍然显示我的登录页面。日志中没有写任何内容。
经过几次尝试和\或刷新后,我确实收到500服务器错误,并在服务器日志中显示以下行:
[Sun Apr 03 13:29:42.447631 2016] [:error] [pid 12956:tid 1956] [client 192.168.1.1:60985] PHP警告:session_start():无法解码会话对象。会话已在第141行的C:\ Users \ simbi \ OneDrive \ Documents \!Personal \ projects \ WS \ apache \ htdocs \ genfunc \ functions.php中销毁,引用:cant_post_too_many_links / edocuments / index.php
[Sun Apr 03 13:29:42.447631 2016] [:error] [pid 12956:tid 1956] [client 192.168.1.1:60985] PHP警告:session_regenerate_id():无法重新生成会话ID - 会话未激活第144行的C:\ Users \ simbi \ OneDrive \ Documents \!Personal \ projects \ WS \ apache \ htdocs \ genfunc \ functions.php,referer:cant_post_too_many_links / edocuments / index.php
[Sun Apr 03 13:29:42.447631 2016] [:error] [pid 12956:tid 1956] [client 192.168.1.1:60985] PHP警告:mysqli :: prepare():无法在C中获取mysqli :\用户\ simbi \ OneDrive \ Documents \!Personal \ projects \ WS \ apache \ htdocs \ genfunc \ functions.php第192行,referer:cant_post_too_many_links / edocuments / index.php
[Sun Apr 03 13:29:42.447631 2016] [:error] [pid 12956:tid 1956] [client 192.168.1.1:60985] PHP致命错误:未捕获错误:在null上调用成员函数bind_param()在C:\ Users \ simbi \ OneDrive \ Documents \!Personal \ projects \ WS \ apache \ htdocs \ genfunc \ functions.php:195 \ n堆栈跟踪:\ n#0 C:\ Users \ simbi \ OneDrive \ Documents \! Personal \ projects \ WS \ apache \ htdocs \ genfunc \ globalstart.php(7):session-> gc(1)\ n#1 C:\ Users \ simbi \ OneDrive \ Documents \!Personal \ projects \ WS \ apache \ htdocs \ edocuments \ index.php(2):include_once('C:\\ Users \\ simbi \\ ...')\ n#2 {main} \ n抛出C:\ Users \ simbi \ OneDrive \ Documents \!Personal \ projects \ WS \ apache \ htdocs \ genfunc \ functions.php 195行,referer:cant_post_too_many_links / edocuments / index.php
我想,也许在index.php中包含了一些错误,因为它显示了这样一个截断的路径,但即使改变它也无济于事。
globalstart.php实际上非常小,我在这里看不到问题:
<?php
#include settings
include_once "../genfunc/config.php";
include_once "../genfunc/functions.php";
$session = new session();
$session->start_session('_s', true);
$session->gc(1);
$loggedin = login_check();
?>
显然不喜欢gc(1)。虽然functions.php中的行是$ this-&gt; gc_stmt-&gt; bind_param('s',$ old);在会话类的gc($ max)函数中如下:
class session {
function __construct() {
// set our custom session functions.
session_set_save_handler(array($this, 'open'), array($this, 'close'), array($this, 'read'), array($this, 'write'), array($this, 'destroy'), array($this, 'gc'));
// This line prevents unexpected effects when using objects as save handlers.
register_shutdown_function('session_write_close');
}
function start_session($session_name, $secure) {
// Make sure the session cookie is not accessable via javascript.
$httponly = true;
// Hash algorithm to use for the sessionid. (use hash_algos() to get a list of available hashes.)
$session_hash = 'sha512';
// Check if hash is available
if (in_array($session_hash, hash_algos())) {
// Set the has function.
ini_set('session.hash_function', $session_hash);
}
// How many bits per character of the hash.
// The possible values are '4' (0-9, a-f), '5' (0-9, a-v), and '6' (0-9, a-z, A-Z, "-", ",").
ini_set('session.hash_bits_per_character', 5);
// Force the session to only use cookies, not URL variables.
ini_set('session.use_only_cookies', 1);
// Get session cookie parameters
$cookieParams = session_get_cookie_params();
// Set the parameters
session_set_cookie_params($cookieParams["lifetime"], $cookieParams["path"], $cookieParams["domain"], $secure, $httponly);
// Change the session name
session_name($session_name);
// Now we cat start the session
session_start();
// This line regenerates the session and delete the old one.
// It also generates a new encryption key in the database.
session_regenerate_id(true);
}
function open() {
global $sesuser, $sespass, $mhost, $mdbname, $mport, $msocket;
$mysqli = new mysqli($mhost, $sesuser, $sespass, $mdbname, $mport, $msocket);
$this->db = $mysqli;
return true;
}
function close() {
$this->db->close();
return true;
}
function read($id) {
if(!isset($this->read_stmt)) {
$this->read_stmt = $this->db->prepare("SELECT data FROM `ed__sessions` WHERE id = ? LIMIT 1");
}
$this->read_stmt->bind_param('s', $id);
$this->read_stmt->execute();
$this->read_stmt->store_result();
$this->read_stmt->bind_result($data);
$this->read_stmt->fetch();
$key = $this->getkey($id);
$data = $this->decrypt($data, $key);
return $data;
}
function write($id, $data) {
// Get unique key
$key = $this->getkey($id);
// Encrypt the data
$data = $this->encrypt($data, $key);
$time = time();
if(!isset($this->w_stmt)) {
$this->w_stmt = $this->db->prepare("REPLACE INTO `ed__sessions` (id, set_time, data, session_key) VALUES (?, ?, ?, ?)");
}
$this->w_stmt->bind_param('siss', $id, $time, $data, $key);
$this->w_stmt->execute();
return true;
}
function destroy($id) {
if(!isset($this->delete_stmt)) {
$this->delete_stmt = $this->db->prepare("DELETE FROM `ed__sessions` WHERE id = ?");
}
$this->delete_stmt->bind_param('s', $id);
$this->delete_stmt->execute();
return true;
}
function gc($max) {
if(!isset($this->gc_stmt)) {
$this->gc_stmt = $this->db->prepare("DELETE FROM `ed__sessions` WHERE set_time < ?");
}
$old = time() - $max;
$this->gc_stmt->bind_param('s', $old);
$this->gc_stmt->execute();
return true;
}
private function getkey($id) {
if(!isset($this->key_stmt)) {
$this->key_stmt = $this->db->prepare("SELECT session_key FROM `ed__sessions` WHERE id = ? LIMIT 1");
}
$this->key_stmt->bind_param('s', $id);
$this->key_stmt->execute();
$this->key_stmt->store_result();
if($this->key_stmt->num_rows == 1) {
$this->key_stmt->bind_result($key);
$this->key_stmt->fetch();
return $key;
} else {
$random_key = hash('sha512', uniqid(mt_rand(1, mt_getrandmax()), true));
return $random_key;
}
}
private function encrypt($data, $key) {
$salt = 'u@cewPpn7e9R9pE2HUe-ebH7=EcC!*7Tw!s4espu@hsWDR3DtDuHrGu6hEAGrrHe';
$key = substr(hash('sha256', $salt.$key.$salt), 0, 32);
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $data, MCRYPT_MODE_ECB, $iv));
return $encrypted;
}
private function decrypt($data, $key) {
$salt = 'u@cewPpn7e9R9pE2HUe-ebH7=EcC!*7Tw!s4espu@hsWDR3DtDuHrGu6hEAGrrHe';
$key = substr(hash('sha256', $salt.$key.$salt), 0, 32);
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, base64_decode($data), MCRYPT_MODE_ECB, $iv);
return $decrypted;
}
}
老实说,我没有看到这里有什么问题,因为这是非常通用的代码,几年前我从其他网站复制过,之前就有用了。但我注意到在数据库中,由于某种原因在登录期间创建了2个会话。也许它失败的原因,但我不明白为什么第二个创建。
有人可以提供建议吗?如果需要,我可以添加与此相关的代码的其他部分。