короче сделал так
<?
$user = mysqli_fetch_assoc(mysqli_query($connection,"SELECT * FROM `users` WHERE `id` = " . (int) $iduser));
$_time = 2;
if($user['last_update'] < (time() - $_time)){

mysqli_query($connection,'UPDATE `users` SET `last_update` = "'.time().'" WHERE `id` = "'.$user['id'].'"');

}


if((time() - $user['last_update']) > $_time) {

mysqli_query($connection,'UPDATE `users` SET `last_update` = "'.time().'" WHERE `id` = "'.$user['id'].'"');



$energi = $user['vit'] * 2;

if($user['energi'] < $energi) {
$_energi = (((time() - $user['last_update']) / $_time) - 1 );
if($_energi > $energi) {
$_energi = $energi - $user['energi'];
}
mysqli_query($connection,'UPDATE `users` SET `energi` = "'.($user['energi'] + $_energi ).'" WHERE `id` = "'.$user['id'].'"');




}
}

проблем не будет?
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посл. ред. 23.02.2018 в 00:48; всего 1 раз(а); by Sheyx