会话在 PHP 中的页面刷新时被破坏 [英] Session is destroyed on page refresh in PHP

问题描述

我正在使用 PHP 开发 Web 应用程序，用户最初必须在其中登录并查看其内容.我正在使用 PHP 会话来维护状态.我遇到了以下问题:

I am developing a web application using PHP in which a user initially has to sign in and view his content. I am using PHP sessions to maintain state. I encountered following problems:

1. 尽管我在每个页面上启动了会话，并且在设置了相关会话变量后，每次刷新页面或在不同选项卡上浏览相同 URL 时，会话都会被销毁.
2. 当用户已登录浏览登录页面时，我需要将用户重定向到他的内容页面.

我对 PHP 很陌生，所以我不知道如何解决这些问题.我在stackoverflow中提到了几个问题，但他们都说会话不会在页面刷新时被破坏.我不明白我的页面有什么问题.非常感谢任何带有解释的解决方案.

I'm really new to PHP, So I have no idea how to solve these problems. I referred several questions in the stackoverflow, but they all say that sessions are not destroyed on page refresh. I could not understand what's wrong with my page. Any solution with explaination is greatly appreciated.

登录页面

<?php

session_start();

class Sessions{
        public static function setSessionState($userdata){
            unset($userdata['password']);
            unset($userdata['timestamp']);
            $_SESSION['user']=$userdata;
        }
    }

if(isset($_POST['username']) && isset($_POST['password'])){
        $dbcon = new DBConnection();
        $dbcon->connect();
        $username= strip_tags(stripslashes(trim($_POST['username'])));
        $password = strip_tags(stripcslashes($_POST['password']));
        echo "<script>alert($username);</script>";
        $result = $dbcon->getUser($username,$password);
        if(mysqli_num_rows($result)==1){
            $user = $dbcon->getUserData($result);     #getUserData function accepts mysqli result as an input and returns a row(array) of user details.
            if(isset($user)){
                Sessions::setSessionState($user);
                header("location:index.php");
            }
            else{
                echo "user variable is not set!!!";
            }
        }
        else if(mysqli_num_rows($result)==0){
            echo "Login error! Username or Password incorrect!";
        }
        else{
            die("Unknown Error occured!");
        }
    }
............

索引页(用户隐私内容可见)

<?php 

    session_start();

    if(isset($_SESSION['user'])){
        print_r($_SESSION['user']);
    }
    else{
        echo "session variable not set";
    }
?>

谢谢.

推荐答案

我终于找到了实际上是我不好的答案.我没有提到 index.php 文件的最后一部分，因为我认为那部分无关紧要.在那部分我有一部分，

I finally found the answer which is actually my bad. I didn't mention the last part of the index.php file as I though that part is irrelevant.In that part I have a part,

<form action="<?php session_destroy(); ?>">

在评论 session_destroy() 方法调用后，我可以解决我的问题并使会话保持活动状态.

After commenting that session_destroy() method call, I could solve my problem and keep session alive.

抱歉代码不完整.

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