session_dureedevie

<?php



//Déclaration de la session

session_start();





//test si la variable existe

if(!isset($_SESSION['time'])){





//elle n' existe pas on la déclare

$_SESSION['time'] = time()+1200;





}



//test de la durée

if($_SESSION['time'] < time()){



        //destruction de la session

        session_unset();

	    session_destroy();



        //redirection

	    header("Location: ./index.php");

        exit();





}else{



//reste de ton code





}



?>

<?php

if( isset( $_REQUEST[session_name()] ) ) {

  session_start();

  if( ! isset( $_SESSION['logged'] ) ) {

    header('Location: http://' . $_SERVER['SERVER_NAME'] . '/' );

    exit;

  }

}

?>

<?php

require 'prepend.inc.php';

// .... le reste

?>

<?php

<?php

session_start();

$_SESSION['logged'] = true;

// la suite ...

?>