Question

我的会话无效。每次我重新加载页面时，它都会生成一个新的会话ID并删除所有会话变量..我不确定我的代码或配置中是否有错误。我在Mac上使用MAMP作为本地服务器软件，使用php 5.2.17

每个php文件首先包含layout_top.php。 layout_top每次都会启动会话：

<?php

        session_start();

    ?>

此外还有一个登录网站：

<?php

include 'layout_top.php';

include 'db_connect.php';

$username = $_POST["li_username"]; 
$pw = $_POST["li_passwort"];

    if ($username == "" || $pw == "") {
        echo "Fülle bitte alle Felder aus!";
        }

    else {

        $check_pw_query = mysql_query("SELECT password FROM user WHERE username = '$username'") or die(mysql_error());

        $check_pw = mysql_fetch_assoc($check_pw_query);

        if ($pw == $check_pw{'password'}) {
            echo "Juhu! </br>";



            $first_name_query = mysql_query("SELECT first_name FROM user WHERE username = '$username'") or die(mysql_error());

            $first_name = mysql_fetch_assoc($first_name_query);

            $second_name_query = mysql_query("SELECT second_name FROM user WHERE username = '$username'") or die(mysql_error());

            $second_name = mysql_fetch_assoc($second_name_query);        

            $id_query = mysql_query("SELECT id FROM user WHERE username = '$username'") or die(mysql_error());

            $id = mysql_fetch_assoc($id_query);

            if (!isset($_SESSION['username'])) {
                $_SESSION['username'] = $username;
            }

            if (!isset($_SESSION['first_name'])) {
                $_SESSION['first_name'] = $first_name{'first_name'};
            }    

            if (!isset($_SESSION['second_name'])) {
                $_SESSION['second_name'] = $second_name{'second_name'};
            }

            if (!isset($_SESSION['id'])) {
                $_SESSION['id'] = $id{'id'};
            }
            if (!isset($_SESSION['gender'])) {
                $_SESSION['gender'] = $gender{'gender'};
            }

        }

    }

它设置会话变量..但如果我重新加载页面，所有会话变量都消失了。希望你能理解我的问题。谢谢你的帮助。

编辑：这是phpinfo（），也许这有助于发现问题..

session.auto_start          Off Off
session.bug_compat_42   On  On
session.bug_compat_warn On  On
session.cache_expire    180 180
session.cache_limiter   nocache nocache
session.cookie_domain   no value    no value
session.cookie_httponly Off Off
session.cookie_lifetime 0   0
session.cookie_path /   /
session.cookie_secure   Off Off
session.entropy_file    no value    no value
session.entropy_length  0   0
session.gc_divisor  100 100
session.gc_maxlifetime  1440    1440
session.gc_probability  1   1
session.hash_bits_per_character|4   4
session.hash_function   0   0
session.name            PHPSESSID|PHPSESSID
session.referer_check   no value    no value
session.save_handler    files   files
session.save_path   /Applications/MAMP/tmp/php  /Applications/MAMP/tmp/php
session.serialize_handler   php php
session.use_cookies On  On
session.use_only_cookies    Off Off
session.use_trans_sid   0   0

编辑2：

Strict Standards: session_start() [function.session-start]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CET/1.0/no DST' instead in /Applications/MAMP/htdocs/network/layout_top.php on line 6

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /Applications/MAMP/htdocs/network/layout_top.php:1) in /Applications/MAMP/htdocs/network/layout_top.php on line 6

Strict Standards: session_start() [function.session-start]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CET/1.0/no DST' instead in /Applications/MAMP/htdocs/network/layout_top.php on line 6

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /Applications/MAMP/htdocs/network/layout_top.php:1) in /Applications/MAMP/htdocs/network/layout_top.php on line 6

Answer 1

为什么你要这么多查询...试试这个

       $query = mysql_query("SELECT * FROM user WHERE username = '$username'") or die(mysql_error());

        while($row = mysql_fetch_array($first_name_query))
        {

        if (!isset($_SESSION['username'])) {
            $_SESSION['username'] = $row['username'];
        }

        if (!isset($_SESSION['first_name'])) {
            $_SESSION['first_name'] = $row['first_name'];
        }    

        if (!isset($_SESSION['second_name'])) {
            $_SESSION['second_name'] = $row['second_name'];
        }

        if (!isset($_SESSION['id'])) {
            $_SESSION['id'] = $row['id'];
        }
        if (!isset($_SESSION['gender'])) {
            $_SESSION['gender'] = $row['gender'];
        }
        }

我将不建议您在会话中保存多个数据 ..只需在会话变量中保存userid，因为会话变量保存在服务器上所以它会在你的服务器上加载..

如果您的会话目录（如您所说的那样/ tmp）不可写，那么它将无法保存，并且每次都必须重新生成一个新目录。以下是验证方法：

if ( !is_writable(session_save_path()) ) { echo 'Session save path "'.session_save_path().'" is not writable!'; }

如果不可写，请更改目录权限 ...

时区错误.. 请看这个链接..你需要set default timezone http://pl.php.net/manual/en/function.date-default-timezone-set.php

并且标头已发送错误请检查 How to fix "Headers already sent" error in PHP

所以你将完成.. :)）

如果您需要任何进一步的指导，请告诉我。

Answer 2

你确定包含“layout_top.php”吗？可能是路径问题，如果您使用include代替require并且您已禁用error_reporting，那么此问题可能会发生，因为包含失败将导致警告，而不是错误，并且它不会显示警告信息。

请在> <{strong> session_start之后>为您的layout_top.php添加一行，以查看会话是否已开始或仅使用echo "hello! session started!";代替require因此，如果找不到该文件，您的脚本将因致命错误而死亡。

Answer 3

这是一种模糊的答案，但有时可能会有所帮助。

不要在包含layout_top.php的每个文件上使用sesison_start()。尝试在第一次加载时启动会话，然后再避免再次调用session_start()。

PHP会话未保存

3 个答案: