stumped on SESSIONS!!

Anon

i am having a mental block over the use of sessions.
i want the user to register, then i want them to log in, from which i want to hold their details so i can transfer them form page to page.

i'm coming unstuck with the session() process. as much as i've read books and looked at php.net and devshed and webmonkey i cant seem to implement it into my site.
can anyone help??

how do i do it, and how does it work?

thanks

Richard

Anon

Sessions fairly easy.

Lets say you have a login page. Username and password. The basic setup.

You want to keep Username and Password from page to page once logged in.

To start a session use:

session_start();

To register the username and password simply do this:

session_register(username);
session_register(password);

(username) and (password) is the variable that was passed to it from the login form. But instead of the $ you just use the name of the variable.

So when you use (username) or (password) in the session you really are holding $username and $password.

Now you have to have the sessions on every page that you want to pass the info to.

I would use one page for all the sessions and simply include it on every page.

Do get the value simply echo the variable.

echo $username;
echo $password;

If you want to know how to check to see if the session is valid then let me know. That is easy as well.

Let me know if that helps

Anon

John,
does that mean that i can have the same value for the session_register as i have for the fields in my db table?
then if i want to see if the values are true ie they have logged in would i use session_is_registered(username,password)

Anon

You can use the same name, yes. To check to see if it is valid try

session_start();

if (!isset($password)) {

echo "Sorry bub! You cant come in here until you log in.";

} else

session_register (username);
session_register (passsword);

Heck if you want you can open a connection to the db and validate the username and password. But hitting the db like that everytime you hit a page is a bad thing.

$sql="SELECT * FROM userdb WHERE username='$username' AND password='$password';"
$result=mysql_query($sql);
$num=mysql_num_rows($result);

if (!$num) {

echo "Scram! Beat It you worthless hack!";

} else

the rest here.

Anon

John,
can i have more than one session.
my scenario is that i have to build a travel agents for an assignment.
i was thinking along the lines of customer comes onto site, can register, process deatils and set cookie, start session.
then the customer views locations. then how do i take the customer details and the location details into a booking page where the location details comes in automatically as well as the customer details. my booking form is thus:
locationid (from location table)
location name (from location table)
customer id (from customer table/session)
customer name (from custome table/session)
startdate
enddate
people(number of people)
total cost(individual cost held in location table)