function timestamp_to_ago($ts){
 
	$now = time();
	$life = $now-$ts;
	$seconds = $life;
	$minutes = floor($life / 60);
	$hours = floor($life / (60 * 60));
	$days = floor($life / (60 * 60 * 24));
 
	if($seconds && !$minutes) {
		$qty = $seconds;
		$unit = $seconds == 1 ? 'secondo' : 'secondi';
	}elseif($seconds && $minutes && !$hours){
		$qty = $minutes;
		$unit = $minutes == 1 ? 'minuto' : 'minuti';
	}elseif($seconds && $minutes && $hours && !$days){
		$qty = $hours;
		$unit = $hours == 1 ? 'ora' : 'ore';
	}elseif($seconds && $minutes && $hours && $days){
		$qty = $days;
		$unit = $days == 1 ? 'giorno' : 'giorni';
	}
	$time = "{$qty} {$unit} fa";
	return $time;
}