php 如何循环遍历php中的会话数组
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How to loop through session array in php
提问by Wern Ancheta
I'm trying to loop through the session. But I can't seem to get the expected results. I'm still trying to explore things. So please teach me a better way to do this. If you find my code unsecure or inappropriate. First I have this login form:
我正在尝试遍历会话。但我似乎无法得到预期的结果。我仍在努力探索事物。所以请教我一个更好的方法来做到这一点。如果您发现我的代码不安全或不合适。首先我有这个登录表单：
<form name="x" action="login.php" method="post">
Username:<input type="text" name="uname" value=""></input><br/>
Password:<input type="password" name="pword" value=""></input>
<input type="submit" value="login"></input>
</form>
And here's login.php which sets the session if the record is found on the mysql database:
如果在 mysql 数据库中找到记录，这里是 login.php 设置会话：
<?php
require_once("conn.php");
$username=$_POST['uname'];
$pword=md5($_POST['pword']);
echo $username."<br/>";
echo $pword;
$check=mysql_query("SELECT * FROM users WHERE Uname='$username' AND Hpword='$pword'");
if(mysql_num_rows($check)==0){
header('Location:loginform.php');
}else{
session_start();
while($result=mysql_fetch_assoc($check)){
$_SESSION['uid'].=$result['ID'];
$_SESSION['uname'].=$result['Uname'];
}
}
?>
And here's the file which loops through the session:
这是在会话中循环的文件：
<?php
session_start();
echo "Logged in users:<br/>";
foreach($_SESSION as $sir){
}
echo "User id: ". $_SESSION['uid']."<br/>";
echo "Username: ".$_SESSION['uname']."<br/>";
?>
I get this:
我明白了：
While I'm expecting to get something like this:
虽然我期待得到这样的东西：
User id: 1 Username: yoh
用户名：1 用户名：yoh
User id: 2 Username: max
用户 id：2 用户名：max
回答by fabrik
$_SESSION is available only for the visitor who opens the page actually. (It would be nice to see everyone's $_SESSION variables, isn't it?)
$_SESSION 仅对实际打开页面的访问者可用。（很高兴看到每个人的 $_SESSION 变量，不是吗？）
You may want to store these $_SESSION vars in your db then loop through them.
您可能希望将这些 $_SESSION 变量存储在您的数据库中，然后循环遍历它们。
Update:
更新：
- create a sessions table where you can store your currently logged in users
- every time when a logged in user opens a page, increment a value (timestamp) like
last_seen - at the same time check dead sessions (e.g. delete all rows where
last_seen?value is smaller thannow- server's session lifetime
- 创建一个会话表，您可以在其中存储当前登录的用户
- 每次登录用户打开页面时，增加一个值（时间戳），如
last_seen - 同时检查死会话（例如删除所有
last_seen?value 小于now- 服务器会话生命周期的行
回答by Your Common Sense
Aside from extremely correct fabrik's answer, just a few lines on your code:
除了非常正确的 fabrik 的答案之外，您的代码中只有几行：
foreach($_SESSION as $sir){
}
this loop obviously does nothing. you can't get any output from the code that outputs nothing :)
这个循环显然什么都不做。您无法从不输出任何内容的代码中获得任何输出:)
Also, if you want to store multiple values into session, like in shopping cart, you have to store in in array, not long concatenated string:
此外，如果您想将多个值存储到会话中，例如在购物车中，您必须存储在数组中，而不是长连接字符串：
$_SESSION['cart'][] =$result;
will produce an array called $_SESSION['cart'] which can be iterated the way you desired:
将生成一个名为 $_SESSION['cart'] 的数组，它可以按照您想要的方式进行迭代：
foreach ($_SESSION['cart'] as $result){
echo "Item id: ".$result['id'].", name: ".$result['name']."<br>\n";
}
回答by Pere
session_start();
foreach ($_SESSION as $name => $value)
{
echo $name."=".$value."<br>";
}
回答by Yoann
UPDATE: non numerical index.
更新：非数字索引。
In login.php
在登录.php
while($result=mysql_fetch_assoc($check)){
$_SESSION[$result['Uname'].$result['ID']] = array(
"uid"=>$result['ID'],
"uname"=>$result['Uname']
);
}
And in you foreach
在你 foreach
foreach($_SESSION as $uinfos){
echo "User id: ".$uinfos["uid"]."<br/>Username: ".$uinfos["uname"]."<br/>";
}
Like this you have only one entry for each user.
像这样，每个用户只有一个条目。
回答by sharpner
why don't you store it like
你为什么不把它储存起来
$_SESSION[$uid] = $name; or $_SESSION[] = array('uid' => $uid, 'name' => $name);
$_SESSION[$uid] = $name; 或 $_SESSION[] = array('uid' => $uid, 'name' => $name);
then you can simply iterate through all entries..
然后你可以简单地遍历所有条目..
foreach($_SESSION as $uid=> $name){
....
}
or
或者
foreach($_SESSION as $userArray){
$uid = $userArray['uid'];
$name = $userArray['name'];
}
