Login user

[agutierrezd]

Este es el código , como hago para mantener la sesion activa,,gracias


<?php
// *** Validate request to login to this site.
if (!isset($_SESSION)) {
session_start();
}

$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
$_SESSION['PrevUrl'] = $_GET['accesscheck'];
}

if (isset($_POST['user'])) {
$loginUsername=$_POST['user'];
$password=$_POST['pass'];
$MM_fldUserAuthorization = "";
$MM_redirectLoginSuccess = "sena_edit.php";
$MM_redirectLoginFailed = "error.php";
$MM_redirecttoReferrer = true;
mysql_select_db($database_oConnIntranet, $oConnIntranet);

$LoginRS__query=sprintf("SELECT cedula, pass FROM datogeneral WHERE cedula='%s' AND pass='%s'",
get_magic_quotes_gpc() ? $loginUsername : addslashes($loginUsername), get_magic_quotes_gpc() ? $password : addslashes($password));

$LoginRS = mysql_query($LoginRS__query, $oConnIntranet) or die(mysql_error());
$loginFoundUser = mysql_num_rows($LoginRS);
if ($loginFoundUser) {
$loginStrGroup = "";

//declare two session variables and assign them
$_SESSION['MM_Username'] = $loginUsername;
$_SESSION['MM_UserGroup'] = $loginStrGroup;

if (isset($_SESSION['PrevUrl']) && true) {
$MM_redirectLoginSuccess = $_SESSION['PrevUrl'];
}
header("Location: " . $MM_redirectLoginSuccess );
}
else {
header("Location: ". $MM_redirectLoginFailed );
}
}
?>