Sessions
If you want to store information temporarily between pages and refreshes then sessions is a good way to do it.
This stores data for a particular user at the server.
In order to use sessions you must first call the
start_session function.
start_session();
You can then assign values to the
$_SESSION global array like so.
$username = "tom";
$_SESSION["username"] = $username;
The name
username is the index of the session value and can be retrieved like a normal associative array value, so you
can access the values like so...
echo $_SESSION["username"];
You can delete a session value with the
unset function...
unset($_SESSION["username"]);
While
session_destroy destroys all data registered to a session.
session_destroy();
How to find out if you have started a session
The function
session_id will return the string id of the current session, or if there is no session
it will return an empty string, so the following can detect if you currently have a session active.
if (empty(session_id())
{
echo "You have no session";
}
If you start a session twice you can get a notice saying that a session has already started, so to get around this you
can do something like...
if (empty(session_id())
{
start_session();
}
Comments to date: 1. Page 1 of 1. Average Rating:
Ajaykumar 5:39pm on Saturday, September 4th, 2010 Give small projects for beginners thanks keep going.
Written by Dominic Skinner
Last Updated: 2011-10-25 16:00:38
