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<?
define ("LOGIN", "user");
define ("PASS", "pwd");
define ("SERVEUR", "server");
define ("BASE", "db");
function connect($host = SERVEUR, $login = LOGIN, $pass = PASS, $base = BASE)
{
$connection = @mysql_pconnect($host, $login, $pass) or die("Connection à ".$host." impossible\n");
mysql_select_db($base, $connection) or die("Accès à la base ".$base." impossible\n");
return $connection;
}
function openSession ($userid)
{
$db = connect ();
// On supprime la session en cours
$requete0 = "DELETE FROM site_session WHERE userid ='".$userid."'";
$resultat0 = @mysql_query ($requete0, $db);
// Re-génération du sid
session_regenerate_id ();
// On insère le nouvel id de session dans la db
$requete1 = "INSERT INTO site_session (sid, userid, ip, browser) VALUES ('".session_id ()."', '".$userid."', '".$_SERVER[REMOTE_ADDR]."', '".$_SERVER[HTTP_USER_AGENT]."')";
//print ($requete1);
$resultat1 = mysql_query ($requete1, $db);
return TRUE;
}
function getLoginCheck ($username, $password)
{
$username = addslashes(trim($username));
$password = md5(addslashes(trim($password)));
// Petite vérification pour éviter une requête sql
if (empty ($username) && empty ($password))
return FALSE;
else
{
$db = connect ();
$requete0 = "SELECT id FROM site_user WHERE username ='".$username."' AND password = '".$password."'";
$resultat0 = mysql_query ($requete0, $db);
$userdata = mysql_fetch_array ($resultat0, MYSQL_ASSOC);
if (!empty($userdata))
$userdata = $userdata['id'];
else
$userdata = FALSE;
return $userdata;
}
}
function getUserInfo ()
{
$db = connect ();
$userdata0 = array ();
$requete0 = "SELECT u.id, u.username FROM site_session s INNER JOIN site_user u ON s.sid ='".session_id()."' AND s.userid = u.id";
$resultat0 = mysql_query ($requete0, $db);
$userdata0 = mysql_fetch_array ($resultat0, MYSQL_ASSOC);
if (empty($userdata0))
$userdata0 = FALSE;
return $userdata0;
}
function getFormView ()
{
$view = "<form action=\"menu.php\" method=\"post\">";
$view .= " <table width=\"25%\" border=\"0\">";
$view .= " <tr><td align=\"left\">Identifiant</td><td align=\"right\"><input type=\"text\" name=\"username\" size=\"20\"></td></tr>";
$view .= " <tr><td align=\"left\">Mot de passe</td><td align=\"right\"><input type=\"password\" name=\"password\" size=\"20\"></td></tr>";
$view .= " <tr><td width=\"100%\" colspan=\"2\"> </td></tr>";
$view .= " <tr><td width=\"100%\" align=\"center\" colspan=\"2\"><input type=\"submit\" value=\"Valider\"></td></tr>";
$view .= " </table>";
$view .= "</form>";
echo $view;
}
function getMsg ($username)
{
$view = "<center>Vous etes connecté en tant que <b>".$username." ";
if (empty ($_POST ['closeSession']))
{
$view .= "<form action=\"menu.php\" method=\"post\">";
$view .= " <input type=\"hidden\" name=\"closeSession\" value=\"1\">";
$view .= "<input type=\"submit\" value=\"Déconnexion\"></center><br />";
}
else
closeSession ();
return $view;
}
function dbClean ()
{
$db = connect ();
$limit = date('Y-m-d H-i-s', mktime(0, 0, 0, date('m'), date('d') - 2, date('Y')));
$requete0 = "DELETE FROM site_session WHERE last_modified < ".$limit;
$resultat0 = mysql_query ($requete0, $db);
}
function closeSession ()
{
$db = connect ();
$requete0 = "DELETE FROM site_session WHERE sid ='".session_id ()."'";
$resultat0 = mysql_query ($requete0, $db);
unset ($_POST ['closeSession']);
$_POST = array ();
$_SESSION = array ();
session_unset ();
setcookie (session_name (), '', time ()-42000, '/');
session_destroy ();
header ("Location:index.php");
//echo '<meta http-equiv="Refresh" content="0;'.$_SERVER['PHP_SELF'].'">';
}
function control ()
{
if (isset ($_POST ['closeSession']))
closeSession ();
if ($userdata = getUserinfo ())
{
openSession ($userdata ['id']);
return getMsg ($userdata ['username']);
}
else
{
//print ("<b>OK !!!</b>");
if (!$_POST)
{
getFormView (); // Affiche le formulaire
exit;
}
else
{
// Vérifie si le couple username/password est correct
if (!$loginCheck = getLoginCheck ($_POST ['username'], $_POST ['password']))
{
print ("Nom d'utilisateur et/ou mot de passe incorrect.<br />");
getFormView (); // On réffiche le form
exit;
}
else
{
dbClean(); // On nettoie la db
// On initialise la session avec le userid récupérer
// par loginCheck
openSession ($loginCheck);
$userdata = getUserInfo ();
if (empty($userdata))
die ('erreur');
//control ();
return getMsg ($userdata ['username']);
}
}
}
}
?> |
