php session_id 不停的变化

请问 我的页面上的session_id 为什么在不停的变化 不是固定的 我每刷新一次它就变化一次 这个应该是固定的啊
是什么问题导致的啊

回复讨论(解决方案)

浏览器不支持cookie？

多半是 session.auto_start = 1

也不排除你的浏览器不支持 cookie

session.auto_start = 0
我的浏览器支持cookie

那只能贴代码说话啦

rss.php

session_start();
$_SESSION["name"] = "lifffffff4";
echo $_SESSION["name"];
echo "
";
echo session_id();
?>
先访问上面的文件 然后访问下面的文件 两次的session_id 不一样
index.php
session_start();
echo $_SESSION["name"];
echo session_id();

?>

rss.php加url跳转过去

不要新开浏览器窗口

session_start();
$_SESSION["name"] = "lifffffff4";
echo $_SESSION["name"];
echo "
";
echo session_id();
echo "2222"
?>
一样的效果

在每段代码的后面加上
print_r($_COOKIE);

在每段代码的后面加上
print_r($_COOKIE);
我打印了都是空数组

session_start();
$_SESSION["name"] = "lifffffff4";
echo $_SESSION["name"];
echo "
";
echo session_id();
echo "2222";
print_r($_COOKIE);
?>


session_start();
echo $_SESSION["name"];
echo session_id();
print_r($_COOKIE);
?>

那就是 cookie 不支持了，无论如何 $_COOKIE['PHPSESSID'] 都应该有的

你更改了 php.ini 中 session 相关的设置了吗？

我没有改 php.ini 现在要怎么办

现在要怎么解决问题我也郁闷了 怎么没有 phpsession 这个cookie

我的浏览器是支持cookie的 这个不用怀疑

弱弱的问一下，session_id 对程序而言有什么特殊用途吗？通常是操作$_SESSION就可以了吧

你用 setcookie 设一个 cookie 变量再试试是否能读回来

同样的代码 放在别人的电脑上面都可以的 我的是怎么回事啊

echo     ini_get("session.use_cookies");//这个值多少

你用 setcookie 设一个 cookie 变量再试试是否能读回来
这个可以 我试过了 没有问题

注意开启错误提示看有无错误信息

error_reporting(E_ALL);ini_set('display_errors',true);

然后session相关的php.ini配置信息贴出来，大家好帮你分析。

[Session]
; Handler used to store/retrieve data.
; http://php.net/session.save-handler
session.save_handler = files

; Argument passed to save_handler. In the case of files, this is the path
; where data files are stored. Note: Windows users have to change this
; variable in order to use PHP's session functions.
;
; The path can be defined as:
;
; session.save_path = "N;/path"
;
; where N is an integer. Instead of storing all the session files in
; /path, what this will do is use subdirectories N-levels deep, and
; store the session data in those directories. This is useful if you
; or your OS have problems with lots of files in one directory, and is
; a more efficient layout for servers that handle lots of sessions.
;
; NOTE 1: PHP will not create this directory structure automatically.
; You can use the script in the ext/session dir for that purpose.
; NOTE 2: See the section on garbage collection below if you choose to
; use subdirectories for session storage
;
; The file storage module creates files using mode 600 by default.
; You can change that by using
;
; session.save_path = "N;MODE;/path"
;
; where MODE is the octal representation of the mode. Note that this
; does not overwrite the process's umask.
; http://php.net/session.save-path
session.save_path = "d:/wamp/tmp"

; Whether to use cookies.
; http://php.net/session.use-cookies
session.use_cookies = 1

; http://php.net/session.cookie-secure
;session.cookie_secure =

; This option forces PHP to fetch and use a cookie for storing and maintaining
; the session id. We encourage this operation as it's very helpful in combatting
; session hijacking when not specifying and managing your own session id. It is
; not the end all be all of session hijacking defense, but it's a good start.
; http://php.net/session.use-only-cookies
session.use_only_cookies = 1

; Name of the session (used as cookie name).
; http://php.net/session.name
session.name = PHPSESSID

; Initialize session on request startup.
; http://php.net/session.auto-start
session.auto_start = 0

; Lifetime in seconds of cookie or, if 0, until browser is restarted.
; http://php.net/session.cookie-lifetime
session.cookie_lifetime = 1000

; The path for which the cookie is valid.
; http://php.net/session.cookie-path
session.cookie_path = /

; The domain for which the cookie is valid.
; http://php.net/session.cookie-domain
session.cookie_domain =80tao.dev

; Whether or not to add the httpOnly flag to the cookie, which makes it inaccessible to browser scripting languages such as JavaScript.
; http://php.net/session.cookie-httponly
session.cookie_httponly =

; Handler used to serialize data. php is the standard serializer of PHP.
; http://php.net/session.serialize-handler
session.serialize_handler = php

; Defines the probability that the 'garbage collection' process is started
; on every session initialization. The probability is calculated by using
; gc_probability/gc_divisor. Where session.gc_probability is the numerator
; and gc_divisor is the denominator in the equation. Setting this value to 1
; when the session.gc_divisor value is 100 will give you approximately a 1% chance
; the gc will run on any give request.
; Default Value: 1
; Development Value: 1
; Production Value: 1
; http://php.net/session.gc-probability
session.gc_probability = 1

; Defines the probability that the 'garbage collection' process is started on every
; session initialization. The probability is calculated by using the following equation:
; gc_probability/gc_divisor. Where session.gc_probability is the numerator and
; session.gc_divisor is the denominator in the equation. Setting this value to 1
; when the session.gc_divisor value is 100 will give you approximately a 1% chance
; the gc will run on any give request. Increasing this value to 1000 will give you
; a 0.1% chance the gc will run on any give request. For high volume production servers,
; this is a more efficient approach.
; Default Value: 100
; Development Value: 1000
; Production Value: 1000
; http://php.net/session.gc-divisor
session.gc_divisor = 1000

; After this number of seconds, stored data will be seen as 'garbage' and
; cleaned up by the garbage collection process.
; http://php.net/session.gc-maxlifetime
session.gc_maxlifetime = 1440

; NOTE: If you are using the subdirectory option for storing session files
; (see session.save_path above), then garbage collection does *not*
; happen automatically. You will need to do your own garbage
; collection through a shell script, cron entry, or some other method.
; For example, the following script would is the equivalent of
; setting session.gc_maxlifetime to 1440 (1440 seconds = 24 minutes):
; cd /path/to/sessions; find -cmin +24 | xargs rm

; PHP 4.2 and less have an undocumented feature/bug that allows you to
; to initialize a session variable in the global scope, even when register_globals
; is disabled. PHP 4.3 and later will warn you, if this feature is used.
; You can disable the feature and the warning separately. At this time,
; the warning is only displayed, if bug_compat_42 is enabled. This feature
; introduces some serious security problems if not handled correctly. It's
; recommended that you do not use this feature on production servers. But you
; should enable this on development servers and enable the warning as well. If you
; do not enable the feature on development servers, you won't be warned when it's
; used and debugging errors caused by this can be difficult to track down.
; Default Value: On
; Development Value: On
; Production Value: Off
; http://php.net/session.bug-compat-42
session.bug_compat_42 = On

; This setting controls whether or not you are warned by PHP when initializing a
; session value into the global space. session.bug_compat_42 must be enabled before
; these warnings can be issued by PHP. See the directive above for more information.
; Default Value: On
; Development Value: On
; Production Value: Off
; http://php.net/session.bug-compat-warn
session.bug_compat_warn = On

; Check HTTP Referer to invalidate externally stored URLs containing ids.
; HTTP_REFERER has to contain this substring for the session to be
; considered as valid.
; http://php.net/session.referer-check
session.referer_check =

; How many bytes to read from the file.
; http://php.net/session.entropy-length
session.entropy_length = 0

; Specified here to create the session id.
; http://php.net/session.entropy-file
;session.entropy_file = /dev/urandom
session.entropy_file =

; http://php.net/session.entropy-length
;session.entropy_length = 16

; Set to {nocache,private,public,} to determine HTTP caching aspects
; or leave this empty to avoid sending anti-caching headers.
; http://php.net/session.cache-limiter
session.cache_limiter = nocache

; Document expires after n minutes.
; http://php.net/session.cache-expire
session.cache_expire = 180

; trans sid support is disabled by default.
; Use of trans sid may risk your users security.
; Use this option with caution.
; - User may send URL contains active session ID
; to other person via. email/irc/etc.
; - URL that contains active session ID may be stored
; in publically accessible computer.
; - User may access your site with the same session ID
; always using URL stored in browser's history or bookmarks.
; http://php.net/session.use-trans-sid
session.use_trans_sid = 0

; Select a hash function for use in generating session ids.
; Possible Values
; 0 (MD5 128 bits)
; 1 (SHA-1 160 bits)
; http://php.net/session.hash-function
session.hash_function = 0

; Define how many bits are stored in each character when converting
; the binary hash data to something readable.
; Possible values:
; 4 (4 bits: 0-9, a-f)
; 5 (5 bits: 0-9, a-v)
; 6 (6 bits: 0-9, a-z, A-Z, "-", ",")
; Default Value: 4
; Development Value: 5
; Production Value: 5
; http://php.net/session.hash-bits-per-character
session.hash_bits_per_character = 5

; The URL rewriter will look for URLs in a defined set of HTML tags.
; form/fieldset are special; if you include them here, the rewriter will
; add a hidden field with the info which is otherwise appended
; to URLs. If you want XHTML conformity, remove the form entry.
; Note that all valid entries require a "=", even if no value follows.
; Default Value: "a=href,area=href,frame=src,form=,fieldset="
; Development Value: "a=href,area=href,frame=src,input=src,form=fakeentry"
; Production Value: "a=href,area=href,frame=src,input=src,form=fakeentry"
; http://php.net/url-rewriter.tags
url_rewriter.tags = "a=href,area=href,frame=src,input=src,form=fakeentry"

session.cookie_domain =80tao.dev


这个值去掉吧，，你确认需要？

这个是我项目的一个 配置 有影响吗

你说的去掉指的是什么意思

session.cookie_domain =80tao.dev
把这个去掉就可以了
但是为什么啊

session.cookie_domain =80tao.dev
把这个去掉就可以了
但是为什么啊

看命名还不清楚啊，，限制域啦

那个是设置session对应的cookie在什么域有效的
你是本地测试么？是http://localhost这么去访问你的项目的么？是的话就去掉，如果是正式站点，你改成

#注意加的那个点,表明所有子域有效，包括wwwsession.cookie_domain = .80tao.dev 

试下。

我填写那个域为什么就不行了啊 默认是空的 为什么 给我解释一下吧

那个是设置session对应的cookie在什么域有效的
你是本地测试么？是http://localhost这么去访问你的项目的么？是的话就去掉，如果是正式站点，你改成
PHP code
#注意加的那个点,表明所有子域有效，包括www
session.cookie_domain = .80tao.dev

试下。


这个很奇怪啊，我好像没见过.dev的正式域名，有吗？

session.cookie_domain =80tao.dev

表示 session 只在 80tao.dev 域有效

所以需要也在这个域中测试你的代码

引用 24 楼 的回复:

session.cookie_domain =80tao.dev
把这个去掉就可以了
但是为什么啊


看命名还不清楚啊，，限制域啦
我是本地反问

我填写那个域为什么就不行了啊 默认是空的 为什么 给我解释一下吧
是我本地的虚拟主机 配置的虚拟域名

引用 26 楼 的回复:

那个是设置session对应的cookie在什么域有效的
你是本地测试么？是http://localhost这么去访问你的项目的么？是的话就去掉，如果是正式站点，你改成
PHP code
#注意加的那个点,表明所有子域有效，包括www
session.cookie_domain = .80tao.dev

试下。



这个很奇怪啊，我好像没……
怎么一说还真是，有点奇葩了，我也没见过dev的域名。

这个很奇怪啊，我好像没见过.dev的正式域名，有吗？
是我本地的虚拟主机 配置的虚拟域名

好吧 表示我不知道

知道这个是个老帖了，可是我最近也遇到这个问题了。也是session_id不段变化，无法做购物车。然后我人为地用session_id("某个值'),可是竟然session不会过期了，无论怎样关浏览器，上一个会话还是存在。希望有大神在这里给我解答一下。谢谢了