因此，我意识到这是一个重复的问题，但是，它显然是一个错误，但其原始帖子已有5年历史，但也有人说这是一次恶意攻击...会话ID太长或包含非法字符，有效字符是az，AZ，0-9和“-”
解决此问题的最新正确方法是什么？
我的错误日志显示：
[2015年9月30日10:12:37 UTC] PHP警告：session_start（）：会话ID太长或包含非法字符，有效字符为/ home /中的az，AZ，0-9和“-”第27行的ACCOUNT / public_html / wp-content / plugins / wl-coupon / wishlist-coupon20.php
[2015年9月30日10:12:37 UTC] PHP警告：session_start（）：在第21行的/home/ACCOUNT/public_html/wp-content/plugins/cusplugin/cusplugin.php中无法启动具有空会话ID的会话
[2015年9月30日10:12:37 UTC] PHP警告：session_start（）：无法在第377行的/home/ACCOUNT/public_html/wp-content/plugins/cusplugin/cusplugin.php中以空会话ID启动会话
[2015年9月30日10:12:37 UTC] PHP警告：session_start（）：无法在第718行的/home/ACCOUNT/public_html/wp-content/plugins/cusplugin/cusplugin.php中以空会话ID启动会话
[2015年9月30日10:12:50 UTC] PHP警告：未知：会话ID太长或包含非法字符，有效字符为第0行中“未知”中的az，AZ，0-9和“-”
[2015年9月30日10:12:50 UTC] PHP警告：未知：无法写入会话数据（文件）。请在第0行的Unknown中验证session.save_path的当前设置正确（/ tmp）
[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
正如您所看到的那样，它们似乎都是成组发生的，只需看看9月30日，它就会在一分钟之内发生很多次，而一天中的其余时间都不会发生...
它为自定义插件，简单的新闻论坛（我认为）和愿望清单优惠券2.0引发了sessionid问题
我的自定义插件代码具有：
if(!session_id()) {
session_start();
}
我从下面尝试了选项2，但没有帮助/解决问题。
导致某些错误的其他WordPress插件的摘要：
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, $require_wlm);
session_start();
另一个堆栈溢出帖子具有一些变通方法，可解决此问题，但我不确定什么是正确的，因为该帖子已有5年以上的历史了，您可能希望在那时修复一个错误。
<?php
function my_session_start()
{
if (ini_get('session.use_cookies') && isset($_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;
}
?>
try {
session_start();
} catch(ErrorExpression $e) {
session_regenerate_id();
session_start();
}
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();
}
<?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;
}
?>
$ok = @session_start();
if(!$ok){
session_regenerate_id(true); // replace the Session ID
session_start();
}
问题：
session_start()依靠$_COOKIE[session_name()]，因此，如果您将cookie值编辑为类似#$#$FDSFSR#"#"$"#$"或只是将其清空（不删除cookie）并使用代码刷新页面：
if (!session_id()) {
session_start();
}
生成以下警告：
PHP警告：session_start（）：会话ID太长或包含非法字符，有效字符为第7行/home/username/public_html/session_start.php中的az，AZ，0-9和'-'。
发生这种情况是因为php正在检查是否session_id()存在，实际上，它是否存在，但是包含不允许用作session_id名称的非法字符。
甲有效 session id可含有仅数字，字母A到Z（大写和小写），逗号和破折号（[-,a-zA-Z0-9]之间）1首128个字符。
我的解决方案：
检查是否$_COOKIE[session_name()]设置了，并且session_id在之前包含有效的session_start()，否则，请删除会话cookie，然后再删除session_start()，例如：
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在您的上定义php.ini为session.name = SOMETHING（默认值为PHPSESSID），因此，您可能正在寻找与匹配的Cookie session.name。您可以使用该session_name()函数来检索它。
2-如果设置了会话cookie操作，黑客可以使用它们从服务器（username和path）中转储信息ini_set('display_errors', 1);。
3-session_regenerate_id(true)有效，但是因为它session_id在分配新的电流之前先检查电流，所以会生成警告。
4-我用几个无效的会话名称测试了代码，没有错误或警告生成，一切正常。
参考文献：
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我来说两句