PHP-使会话在X分钟后过期 [英] PHP - make session expire after X minutes

问题描述

我正在使用以下技术...

i am using the following technique...

从login.php表单发布到页面check.php，我在其中进行此操作

From the login.php the form posts to the page check.php where i do this

<?php    
$uzer = $_POST['user_name'];
$pass = $_POST['user_pass'];

require ('DB_connection.php');

$result = mysql_query("SELECT * FROM accounts WHERE user_Name='$uzer' AND user_Pass='$pass'");

if( mysql_num_rows( $result ) > 0)
{
    $array = mysql_fetch_assoc($result);    

    session_start();
    $_SESSION['user_id'] = $uzer;
    header("Location:loggedin.php");            
}
else
{
    header("Location:login.php");
}
?>

在loggedin.php页面上，我要做的第一件事是

and on loggedin.php page the first thing i do is

<?php
session_start();
if( !isset( $_SESSION['user_id'] ) )
{
    header("Location:login.php");
}
else
{
    echo ( "this session is ". $_SESSION['user_id'] );
    //show rest of the page and all
}
?>

但是当我直接输入网址localhost\myProject\loggedin.php时登录后，它会显示页面...这很有意义，因为会话已开始

but once logged in when i directly type the url localhost\myProject\loggedin.php it displays the page...which makes perfect sense because the session has started

我要实现的是

• 直接URL \会话将在会话终止\过期\超时后工作10分钟，然后使用必须再次登录，并且可能会获得相同的会话ID，但是10分钟后，使用将无法使用同一会话

我需要做什么或学习

推荐答案

在会话中存储时间戳:

<?php    
$uzer = $_POST['user_name'];
$pass = $_POST['user_pass'];

require ('DB_connection.php');

// Hey, always escape input if necessary!
$result = mysql_query(sprintf("SELECT * FROM accounts WHERE user_Name='%s' AND user_Pass='%s'", mysql_real_escape_string($uzer), mysql_real_escape_string($pass));

if( mysql_num_rows( $result ) > 0)
{
    $array = mysql_fetch_assoc($result);    

    session_start();
    $_SESSION['user_id'] = $uzer;
    $_SESSION['login_time'] = time();
    header("Location:loggedin.php");            
}
else
{
    header("Location:login.php");
}
?>

检查时间戳是否在允许的时间范围内(600秒为10分钟):

Check if the timestamp is within the allowed time window (600 seconds is 10 minutes):

<?php
session_start();
if( !isset( $_SESSION['user_id'] ) || time() - $_SESSION['login_time'] > 600)
{
    header("Location:login.php");
}
else
{
    // uncomment the next line to refresh the session, so it will expire after ten minutes of inactivity, and not 10 minutes after login
    //$_SESSION['login_time'] = time();
    echo ( "this session is ". $_SESSION['user_id'] );
    //show rest of the page and all
}
?>

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