Session In PHP

To use session, type
session_register("username");    // username is variable 
                                 // $username="lady gaga"
The you check it by using:

session_start();    // this must the first you type in the file.

$name = $_SESSION['username'];

echo $name;

For complete example, look
checklogin.php

<?php

    $username = $_POST['username'];
    $password = $_POST['password'];

    mysql_connect("localhost","root","");
    mysql_select_db("satu");
    $query = "SELECT * FROM login WHERE username='$username'

              AND password='$password'";
    $result = mysql_query($query);
    $count = mysql_num_rows($result);

    if($count==1){
        session_register('username');

        session_register('password');
        header("Location: hello.php");
    }else{
        header("Location: index.php");
    }
?>

Type this in hello.php

<?php 

    session_start();

    if(!session_is_registered('username')){

        header("location: index.php");

    }

  

    echo "<h1>Hello, $_SESSION['username']<h1>";
?>

To make a logout app, type:

<?php

    session_start();

    session_destroy();

?>

           

Session In PHP