时间戳

首页 > 解决方案 > 如果未设置会话，则打印默认消息

php - 如果未设置会话，则打印默认消息

问题描述

我有一个书店网站，该网站目前具有登录功能，可在成功登录时设置会话。我试图在我的 index.php 文件上实现一个标题，如果用户没有登录，它会打印出“Guest”，并在成功登录时用他们的名字替换“Guest”。目前，当用户登录时，我的网页打印出“欢迎来到书店，（姓名）”。但是如果用户没有登录并且没有设置会话，它只会打印出“Welcome to the Bookstore”。这是我的代码：

<?php
    session_start();
    include "connection.php";

    $greeting = "";

    if(!isset($_SESSION)) {
        $greeting = "Guest";
    }
    if(isset($_SESSION)) {
        $greeting = $_SESSION['name'];
    }



 ?>



<!DOCTYPE html>
 <html>
    <head>
        <title>UND Bookstore</title>
        <meta name="viewport" content="width=device-width, initial-scale=1.0"></meta>
        <meta name="author" content="Sai Peri"></meta>
        <meta name="description" content="CSCI 457 Assignment 1"></meta>
        <!-- Latest compiled and minified CSS -->
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
        <!-- Optional theme -->
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
        <!-- Latest compiled and minified JavaScript -->
        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
        <!-- Latest jQuery libraries -->
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
    </head>
    <body>
        <div class="container">
            <div class="row">
                <div class="col-md-12">
                    <nav id="nav" class="navbar navbar-inverse text-center">
                        <ul class="nav navbar-nav">
                            <li class="active"><a href="index.php">Home</a></li>
                            <li><a href="login.php">Login</a></li>
                            <li><a href="search.php">Search</a></li>
                            <li><a href="check.php">Add/Delete/Edit</a></li>
                        </ul>
                    </nav>
                </div> <!-- End col-md-12 -->
            </div>  <!-- End row (nav)-->
            <div class="row" id="body">
                <div class="col-md-12">
                    <div class="page-header">
                        <h3 class="text-center">Welcome to the Bookstore, <?php echo $greeting; ?></h3>
                    </div> <!-- End of page-header -->
                    <p class="text-center">In order to get the full functionalty of the website you need to login. If you do not have an account you can register on the same "Login" webpage. You do not need to be logged in to use the search functionality, however. It should be noted that only the administrator can access the "Add/Delete/Edit" page.</p>
                </div> <!-- End col-md-12 -->
            </div> <!-- End row (nav)-->
            <div class="row" id="footer">
                <div class="col-md-12 text-center">
                    <footer>Created 2019 by Sai Peri</footer>
                </div> <!-- End col-md-12 -->
            </div> <!-- End row (nav)-->
        </div> <!-- End container -->
    </body>
</html>

标签： phpsession

解决方案

除了我的评论之外，检查用户是否未登录还有什么意义吗？为什么不只是假设是这种情况，如果找到的话，将用户名添加到问候语中。

就像是：

<?php
    session_start();
    include "connection.php";

    $greeting = "Guest";

    if(isset($_SESSION['name'])) {
        $greeting = htmlspecialchars($_SESSION['name']);
        // added special chars to avoid xss attacks
    }



 ?>

推荐阅读