如何使用 php 在不同的页面中访问我的会话变量？
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How can I access my session variable in a different page with php?
提问by CloudyKooper
everyone I started the session variable at the top of the login.php page. the session is then set and I call the second page using the include statement. I tested with an if statement and it seemed to pass ok. then I try to echo the contents of the variable in the newly displayed page. The page displays meaning that it passes the if block but the contents of the session variable does not show. It's as if the session variable has gone out of scope. How can I access my session variable in a different page.
我在login.php 页面的顶部启动了会话变量。然后设置会话，我使用 include 语句调用第二页。我用 if 语句进行了测试，它似乎通过了。然后我尝试在新显示的页面中回显变量的内容。页面显示意味着它通过了 if 块，但会话变量的内容没有显示。就好像会话变量已经超出了范围。如何在不同的页面中访问我的会话变量。
<?php
session_start();
$username = "";
if (isset($_POST['submit']))
{
$username = $_POST["username"];
$password = $_POST["password"];
$_SESSION["username"] = $found_admin["username"];
if (isset($_SESSION["username"]));
{
redirect_to("index.php");
}
else
{
$_SESSION["message"] = "Username/password not found.";
}
}
?>
<?php include("login.html"); ?>
Here's the html page that's called by my php file:
这是我的 php 文件调用的 html 页面：
<!doctype html>
<head>
</head>
<body>
<?php
echo $_SESSION["username"];
$loggenOnUser=$_SESSION["username"];
?>
<div class="gridContainer clearfix">
<div id="div1" class="fluid">
This page is being called by my login.php file.</div><div id="LoggedInUser" class="fluid ">Hi. I'm <?php $loggenOnUser?> </div>
<img id="homeImage" src="images/home.gif" /> </div>
</div>
</body>
</html>
Can't seem to get why I can't get access to the session variable on another page. Any help would be greatly appreciated. Thanks!
似乎无法理解为什么我无法访问另一个页面上的会话变量。任何帮助将不胜感激。谢谢！
采纳答案by Angry 84
Make sure that you use
确保您使用
session_start();
In the start of every page, or any PHP file that needs to have access to the session.
在每个页面或任何需要访问会话的 PHP 文件的开头。
The easiest way to do this, is have something like a header.phpfile and include/require this at the top of every page of your site or common pages.
最简单的方法是在你的站点的每个页面或公共页面的顶部添加一个header.php文件并包含/要求它。
In this header.php you would have something like
在这个 header.php 你会有类似的东西
<?php
session_start();
if (isset($_SESSION['username'])) {
// This session already exists, should already contain data
echo "User ID:", $_SESSION['id'], "<br />"
} else {
// New PHP Session / Should Only Be Run Once/Rarely/Login/Logout
$_SESSION['username'] = "yourloginprocesshere";
$_SESSION['id'] = 444;
}
?>
The simply have your page like this
只需让您的页面像这样
<?php require "header.php"; ?>
<!doctype html>
<head></head>
<body>
<?php
if (isset($_SESSION["username"])) {
$loggenOnUser = $_SESSION["username"];
echo "Found User: ", $loggenOnUser, "<br />"
} else {
$loggenOnUser = " a public user";
}
?>
<div class="gridContainer clearfix">
<div id="div1" class="fluid">
This page is being called by my login.php file.
</div>
<div id="LoggedInUser" class="fluid ">
Hi. I'm <?php echo $loggenOnUser; ?>
</div>
<img id="homeImage" src="images/home.gif" /> </div>
</div>
</body>
</html>
回答by Bender
*edit
*编辑
- You forget
echo You need to start session before accessing session variables
put
session_start()on top of your page put echoHi. I'm <?php echo $loggenOnUser; ?>
- 你忘记
echo 您需要在访问会话变量之前启动会话
放在
session_start()你的页面顶部放回声Hi. I'm <?php echo $loggenOnUser; ?>
回答by Raghav
Check this site: http://php.net/manual/en/function.session-start.php
检查这个网站：http: //php.net/manual/en/function.session-start.php
You need to write session_start()in all your php files, best at the top.
您需要写入session_start()所有 php 文件，最好在顶部。
回答by Amit
If you have done echo and session start, which absolutely need to be done, and still nothing, then looks like you have 'nothing' in the $found_admin array against that user name
如果你已经完成了 echo 和 session start，这绝对需要完成，但仍然没有，那么看起来你在 $found_admin 数组中针对该用户名没有任何内容
$_SESSION["username"] = $found_admin["username"];
Are you sure there is something in that array? Can you print the $found_admin array?
你确定那个数组中有东西吗？你能打印 $found_admin 数组吗？
回答by Adrian Cid Almaguer
Try this, you forget the session_start() at the beginning
试试这个，你忘记了开头的 session_start()
<?php
session_start();
?>
<!doctype html>
<head>
</head>
<body>
<?php
echo $_SESSION["username"];
$loggenOnUser=$_SESSION["username"];
?>
<div class="gridContainer clearfix">
<div id="div1" class="fluid">
This page is being called by my login.php file.</div><div id="LoggedInUser" class="fluid ">Hi. I'm <?php $loggenOnUser?> </div>
<img id="homeImage" src="images/home.gif" /> </div>
</div>
</body>
</html>
回答by banana_Ai
You should put session_start()before you use session array.
Also, instead of <?php $loggenOnUser?>try <?=$loggenOnUser?>.
您应该session_start()在使用会话数组之前放置。此外，而不是<?php $loggenOnUser?>try <?=$loggenOnUser?>。
