Recharger un bout de code php toute les x secondes

function deco_auto($temps_minute){ 
	if(isset($_SESSION['id'])){
        if(is_valid_userpanel()){
		  if(!isset($bdd)){
		  	$bdd = connexion_bdd("administration");
		  } 
		  $times_limit = (60*$temps_minute);
		  	if($_SESSION['timeout'] + $times_limit <= time()) {
                header('Location: deconnexion.php?id_membre='.$_SESSION['panel_id'].'&token='.$_SESSION['token_panel']);
		  	} else {
 	 	    		$_SESSION['timeout'] = time();
		  	}
        }
	}
}

$_SESSION['timeout']

$times_limit

time()