Secure pages Sessions vs. Cookies & session_destroy() help
Posted on
16th Feb 2014 07:03 pm by
admin
Im new here and new to PHP, I hope you can help me with some questions.
Im writing my web app, and i have login screen where user enters his username and passoword, then I check im MySQL database is it ok, and if its ok and user exists, I send him to protected pages, i have 3 protected pages that only registred users can acess.
Now the problem is I dont know should I use Sessions or Cookies to check if user is loged in? Cookies are cool and simple but I dont know how to encrypt them so anyone can see them. What is the best method to encrypt cookie?
And with Sessions I joust cant destroy session with session_destroy();
Here is the code of secure pages, and logout.php
Secure page (there are 3 of them but they are all the same as this one):
Code: <?php
session_start();
$username = $_SESSION['username'];
$password = $_SESSION['password'];
include 'database_connect.php';
$sql = "SELECT * FROM users WHERE username='$username' AND password='$password'";
$sql = mysql_query($sql) or die(mysql_error());
$count = mysql_num_rows($sql);
if ($count !== 1) { header("location: login-fail.php"); }
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>PHP generated</title>
</head>
<body>
<?php echo $username . " <p>welcome to Content Manager</p>" ?>
<a href="admin-site-manager.php">Site Manager</a>
<a href="admin-account-manager.php">Account Manager</a>
<br/>
<a href="logout.php">Logout</a>
</body>
</html>
And this is logout.php
Code: <?php
session_start();
session_destroy();
header("location: index.php");
?>
So my questions are:
1. Whats wrong with this script, it works great, but logout is not working, when i click logout, it sends me to index.php, but if I enter URL of "secured" page it show me that page and tells me Im loged in :/. So i gues my logout.php is not working. I guess that after 24 minutes it wouldnt show me secure page anymore but i didnt wait that long. In documentation it writes that it takes 24 minutes for session to compleatly destroy, if we dont change php.ini file.
2. To secure pages so only registred users can acess them, like I did now, what is better, Sessions, or Cookies, or is there any way to combain them? Is it ok to use only sessions like I did? Is it secure, and what would could I get if I use cookies too. Can someone explain me when should I use Sessions and when Cookies?
3. About Cookies encryption, what is the best way to encrypt a cookie, so if Im sending $password from one page to another and store that password in a cookie, how to secure it from users to see it? What is the best way to do that?
No comments posted yet
Your Answer:
Login to answer
344 
49 
Other forums
Are sessions secure at all?..
I haven't really gotten into yet, but I was just thinking of something weird..
Lets say you h
How to make a mail Form secure?
I want to create an email Form on my web site. How can I make the Form secure so the submitted info
Thread in PHP
Thread in PHP
Some basic use and basic code for thread in php
This is my question?
session variable problem
Session variable is not working in Fire fox i am getting null value but it is working fine in IE.duplicate record notification
In my database, after insertion of records, I want to know if the record inserted is duplicate or no
Error in query: Resource id #4??
hey guys, having a minor (i think) problem here that i havent been able to figure out. long story sh
Displaying a record from mysql in a simple swf file
Hi,
I have a mysql database containing information I would like to display in my swf.
Help With editting and deleting form
So look at this image :
http://img194.imageshack.us/img194/8272/snapshot5f.png
This table
Effort Estimation Template for Steady State Support
Hi Everyone,
Is there any SAP provided template/format for system change and enhancements
Need Help with a query
Hello,
For some reason I am just not getting the right answer when I do this query and not quite
