// Ajout/Mise à jour du registre | WORKS
$req = @mysql_query($sql) or die('Erreur SQL !<br>'.$sql.'<br>'.mysql_error()); 
$num_rows = mysql_num_rows($req);
if ($num_rows > 0) {
	$sql = "UPDATE `quizz_users` SET `jour` = '". $jour ."', `heure` = '". $heure ."' WHERE `pseudo` = '". $pseudo ."'";
	$req = @mysql_query($sql) or die('Erreur SQL !<br>'.$sql.'<br>'.mysql_error());
}
else {
	$sql = "INSERT INTO `quizz_users` (`id`, `jour`, `heure`, `pseudo`) VALUES (NULL, '". $jour. "', '". $heure ."', '". $pseudo. "');";
	$req = @mysql_query($sql) or die('Erreur SQL !<br>'.$sql.'<br>'.mysql_error());
}