多半是 session.auto_start = 1也不排除你的浏览器不支持 cookie
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我的浏览器支持cookie
session_start();
$_SESSION["name"] = "lifffffff4";
echo $_SESSION["name"];
echo "<br>";
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
<?php
session_start();
echo $_SESSION["name"];
echo session_id();?>
session_start();
$_SESSION["name"] = "lifffffff4";
echo $_SESSION["name"];
echo "<br>";
echo session_id();
echo "<a href=\"/test/index.php\">2222</a>"
?>
一样的效果
print_r($_COOKIE);
print_r($_COOKIE);
我打印了都是空数组
session_start();
$_SESSION["name"] = "lifffffff4";
echo $_SESSION["name"];
echo "<br>";
echo session_id();
echo "<a href=\"/test/index.php\">2222</a>";
print_r($_COOKIE);
?>
<?php
session_start();
echo $_SESSION["name"];
echo session_id();
print_r($_COOKIE);
?>
echo ini_get("session.use_cookies");//这个值多少
这个可以 我试过了 没有问题
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。
; 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 books.
; 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 <input> 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"
这个值去掉吧，，你确认需要？
把这个去掉就可以了
但是为什么啊
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www
session.cookie_domain = .80tao.dev
试下。
是我本地的虚拟主机 配置的虚拟域名