session_start()有关非法字符,空会话ID和失败会话的问题

Question

所以,我意识到这是一个重复的问题,但它显然是一个错误,但原来这个帖子是5岁但它也说它是恶意攻击... 会话ID太长或包含非法字符,有效字符是az,AZ,0-9和' - ,'

处理这个问题的最新,正确方法是什么？

我的错误日志显示:

[30-Sep-2015 10:12:37 UTC] PHP警告:session_start():会话ID太长或包含非法字符,有效字符是/ home /中的az,AZ,0-9和' - ,'第27行的ACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php

[30-Sep-2015 10:12:37 UTC] PHP Warning: session_start(): Cannot start session with empty session ID in /home/ACCOUNT/public_html/wp-content/plugins/cusplugin/cusplugin.php on line 21

[30-Sep-2015 10:12:37 UTC] PHP Warning: session_start(): Cannot start session with empty session ID in /home/ACCOUNT/public_html/wp-content/plugins/cusplugin/cusplugin.php on line 377

[30-Sep-2015 10:12:37 UTC] PHP Warning: session_start(): Cannot start session with empty session ID in /home/ACCOUNT/public_html/wp-content/plugins/cusplugin/cusplugin.php on line 718

[30-Sep-2015 10:12:50 UTC] PHP Warning: Unknown: The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in Unknown on line 0

[30-Sep-2015 10:12:50 UTC] PHP Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0

My full logs:

[30-Sep-2015 10:12:37 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[30-Sep-2015 10:12:37 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 377
[30-Sep-2015 10:12:37 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[30-Sep-2015 11:12:37 Europe/London] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 718
[30-Sep-2015 11:12:37 Europe/London] PHP Fatal error:  Call to a member function check_connection() on a non-object in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/simple-press/sp-api/sp-api-wpdb.php on line 439
[30-Sep-2015 10:12:49 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[30-Sep-2015 10:12:50 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 377
[30-Sep-2015 10:12:50 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[30-Sep-2015 10:12:50 UTC] PHP Warning:  Unknown: The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in Unknown on line 0
[30-Sep-2015 10:12:50 UTC] PHP Warning:  Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
[30-Sep-2015 10:12:50 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[30-Sep-2015 10:12:50 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 377
[30-Sep-2015 10:12:50 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[30-Sep-2015 10:12:51 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 718
[30-Sep-2015 10:12:51 UTC] PHP Fatal error:  Call to a member function check_connection() on a non-object in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/simple-press/sp-api/sp-api-wpdb.php on line 439
[30-Sep-2015 10:12:53 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[30-Sep-2015 10:12:53 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 377
[30-Sep-2015 10:12:53 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[30-Sep-2015 10:12:53 UTC] PHP Warning:  Unknown: The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in Unknown on line 0
[30-Sep-2015 10:12:53 UTC] PHP Warning:  Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
[30-Sep-2015 10:13:04 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[30-Sep-2015 10:13:04 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 377
[30-Sep-2015 10:13:04 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[30-Sep-2015 10:13:04 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 718
[30-Sep-2015 10:13:04 UTC] PHP Fatal error:  Call to a member function check_connection() on a non-object in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/simple-press/sp-api/sp-api-wpdb.php on line 439
[01-Oct-2015 04:47:21 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[01-Oct-2015 04:47:21 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 377
[01-Oct-2015 04:47:21 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[01-Oct-2015 04:47:21 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[01-Oct-2015 04:47:21 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 377
[01-Oct-2015 05:47:22 Europe/London] PHP Warning:  Unknown: The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in Unknown on line 0
[01-Oct-2015 05:47:22 Europe/London] PHP Warning:  Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
[01-Oct-2015 04:47:22 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[01-Oct-2015 04:47:22 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 718
[01-Oct-2015 04:47:22 UTC] PHP Fatal error:  Call to a member function check_connection() on a non-object in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/simple-press/sp-api/sp-api-wpdb.php on line 439
[01-Oct-2015 04:47:24 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[01-Oct-2015 04:47:24 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 377
[01-Oct-2015 04:47:24 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[01-Oct-2015 04:47:24 UTC] PHP Warning:  Unknown: The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in Unknown on line 0
[01-Oct-2015 04:47:24 UTC] PHP Warning:  Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
[01-Oct-2015 23:10:23 UTC] PHP Warning:  in_array() expects parameter 2 to be array, null given in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 492
[01-Oct-2015 23:11:15 UTC] PHP Warning:  in_array() expects parameter 2 to be array, null given in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 492[02-Oct-2015 08:59:42 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[02-Oct-2015 08:59:42 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 385
[02-Oct-2015 08:59:42 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[02-Oct-2015 09:59:42 Europe/London] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 739
[02-Oct-2015 09:59:42 Europe/London] PHP Fatal error:  Call to a member function check_connection() on a non-object in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/simple-press/sp-api/sp-api-wpdb.php on line 439
[02-Oct-2015 08:59:44 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[02-Oct-2015 08:59:45 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 385
[02-Oct-2015 08:59:45 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[02-Oct-2015 08:59:45 UTC] PHP Warning:  Unknown: The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in Unknown on line 0
[02-Oct-2015 08:59:45 UTC] PHP Warning:  Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
[02-Oct-2015 08:59:46 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[02-Oct-2015 08:59:46 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 385
[02-Oct-2015 08:59:46 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[02-Oct-2015 08:59:46 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 739
[02-Oct-2015 08:59:46 UTC] PHP Fatal error:  Call to a member function check_connection() on a non-object in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/simple-press/sp-api/sp-api-wpdb.php on line 439
[02-Oct-2015 08:59:52 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[02-Oct-2015 08:59:52 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 385
[02-Oct-2015 08:59:52 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[02-Oct-2015 08:59:52 UTC] PHP Warning:  Unknown: The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in Unknown on line 0
[02-Oct-2015 08:59:52 UTC] PHP Warning:  Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
[03-Oct-2015 04:51:46 UTC] PHP Warning:  require(ABSPATHwp-includes/load.php): failed to open stream: No such file or directory in /home/HOSTINGACCOUNT/public_html/wp-settings.php on line 21
[03-Oct-2015 04:51:46 UTC] PHP Warning:  require(ABSPATHwp-includes/load.php): failed to open stream: No such file or directory in /home/HOSTINGACCOUNT/public_html/wp-settings.php on line 21
[03-Oct-2015 04:51:46 UTC] PHP Fatal error:  require(): Failed opening required 'ABSPATHwp-includes/load.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/HOSTINGACCOUNT/public_html/wp-settings.php on line 21
[03-Oct-2015 08:09:48 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[03-Oct-2015 08:09:48 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 385
[03-Oct-2015 08:09:48 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[03-Oct-2015 09:09:49 Europe/London] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 727
[03-Oct-2015 09:09:49 Europe/London] PHP Fatal error:  Call to a member function check_connection() on a non-object in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/simple-press/sp-api/sp-api-wpdb.php on line 439
[03-Oct-2015 08:09:52 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[03-Oct-2015 08:09:52 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 385
[03-Oct-2015 08:09:52 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[03-Oct-2015 08:09:52 UTC] PHP Warning:  Unknown: The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in Unknown on line 0
[03-Oct-2015 08:09:52 UTC] PHP Warning:  Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
[03-Oct-2015 08:09:55 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[03-Oct-2015 08:09:55 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 385
[03-Oct-2015 08:09:55 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[03-Oct-2015 08:09:55 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 727
[03-Oct-2015 08:09:55 UTC] PHP Fatal error:  Call to a member function check_connection() on a non-object in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/simple-press/sp-api/sp-api-wpdb.php on line 439
[03-Oct-2015 08:09:57 UTC] PHP Warning:  session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/wl-coupon/wishlist-coupon20.php on line 27
[03-Oct-2015 08:09:57 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 385
[03-Oct-2015 08:09:57 UTC] PHP Warning:  session_start(): Cannot start session with empty session ID in /home/HOSTINGACCOUNT/public_html/wp-content/plugins/customplugin/customplugin.php on line 21
[03-Oct-2015 08:09:57 UTC] PHP Warning:  Unknown: The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in Unknown on line 0
[03-Oct-2015 08:09:57 UTC] PHP Warning:  Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0

As you can see there they all seem to happen in groups just look at 30th of september it happens loads of times all within 1 min then doesn't happen the rest of the day...

It's throwing the sessionid issue up for customplugin, simple press forums (I think), and Wishlist Coupon 2.0

My customplugin code has:

if(!session_id()) {
    session_start();
}

I've tried option 2 from below but it didn't help/fix the problem.

A snippet of the other WordPress plugin that is causing the some of the error(s):

class WishListCoupon20 extends WishListPlugin {
    public function __construct($file, $slug, $sku, $name, $link_name, $prefix, $require_wlm) {
        parent::__construct($file, $slug, $sku, $name, $link_name, $prefix, $require_wlm);

        session_start();

另一个堆栈溢出帖子有一些解决问题的变化,但我不确定什么是正确的,因为帖子是5年以上,你会期望在那个时间修复一个错误.

选项1感谢Sergey Eremin:

<?php
    function my_session_start()
    {
        if (ini_get('session.use_cookies') && isset($_COOKIE['PHPSESSID'])) {
            $sessid = $_COOKIE['PHPSESSID'];
        } elseif (!ini_get('session.use_only_cookies') && isset($_GET['PHPSESSID'])) {
            $sessid = $_GET['PHPSESSID'];
        } else {
            session_start();
            return false;
        }

        if (!preg_match('/^[a-z0-9]{32}$/', $sessid)) {
            return false;
        }
        session_start();

        return true;
    }
?>

选项2感谢danjfoley:

try {
   session_start();
} catch(ErrorExpression $e) {
   session_regenerate_id();
   session_start();
}

选项3归功于Cendak(使用Andron之前的解决方案)

function my_session_start()
{
      $sn = session_name();
      if (isset($_COOKIE[$sn])) {
          $sessid = $_COOKIE[$sn];
      } else if (isset($_GET[$sn])) {
          $sessid = $_GET[$sn];
      } else {
          return session_start();
      }

     if (!preg_match('/^[a-zA-Z0-9,\-]{22,40}$/', $sessid)) {
          return false;
      }
      return session_start();
}

if ( !my_session_start() ) {
    session_id( uniqid() );
    session_start();
    session_regenerate_id();
}

选项4感谢Andron:

<?php
    function my_session_start()
    {
        $sn = session_name();
        if (isset($_COOKIE[$sn])) {
            $sessid = $_COOKIE[$sn];
        } else if (isset($_GET[$sn])) {
            $sessid = $_GET[$sn];
        } else {
            session_start();
            return false;
        }

       if (!preg_match('/^[a-zA-Z0-9,\-]{22,40}$/', $sessid)) {
            return false;
        }
        session_start();

       return true;
    }
?>

选项5归功于alpere:

$ok = @session_start();
if(!$ok){
session_regenerate_id(true); // replace the Session ID
session_start(); 
}

或者,还有更好的方法.

Answer 1

@Ryflex,我在我的服务器上做了几个测试并得出以下结论:

问题:

session_start()依赖于$_COOKIE[session_name()],所以,如果您将cookie值编辑为类似的东西,#$#$FDSFSR#"#"$"#$"或者只是将其清空(不删除cookie)并使用您的代码刷新页面:

if (!session_id()) {
    session_start();
}

生成以下警告:

PHP警告:session_start():会话ID太长或包含非法字符,有效字符是第7行的/home/username/public_html/session_start.php中的az,AZ,0-9和' - ,'

发生这种情况是因为php检查是否session_id()存在,实际上是否存在,但包含不允许作为session_id名称的非法字符.

甲有效 session id可含有仅数字,字母A到Z(大写和小写),逗号和破折号([-,a-zA-Z0-9]之间)1首128个字符.

我的解决方案

检查是否$_COOKIE[session_name()]已设置且包含有效session_id之前session_start(),否则,删除会话cookie,然后才会执行以下操作 session_start():

function safeSession() {
    if (isset($_COOKIE[session_name()]) AND preg_match('/^[-,a-zA-Z0-9]{1,128}$/', $_COOKIE[session_name()])) {
        session_start();
    } elseif (isset($_COOKIE[session_name()])) {
        unset($_COOKIE[session_name()]);
        session_start(); 
    } else {
        session_start(); 
    }
}

开始会议:

safeSession();

笔记:

1 - session_name在您的php.inias session.name = SOMETHING(默认为PHPSESSID)上定义,因此,您可能正在寻找cookie匹配session.name.您可以使用该session_name()功能来检索它.

2 - 黑客可以使用会话cookie操作来从服务器(username和path)中转储信息(如果ini_set('display_errors', 1);已设置).

3 - session_regenerate_id(true)工作但是,因为它session_id在分配新电流之前检查当前电流,所以会产生警告.

4 - 我用几个无效的会话名称测试了代码,没有生成任何错误或警告,一切正常和有意.

参考文献:

session.c源代码