function TimeSpent($sec) {
    $month = (int) ($sec / 2628000);
    $days = (int) ($sec / 86400) % 30;
    $hours = (int) ($sec / 3600) % 24;
    $minuts = (int) (($sec / 60) % 60);
    $seconds = $sec % 60;
 
    $time_arr = array(
        array($month, 'мес'),
        array($days, 'д'),
        array($hours, 'ч'),
        array($minuts, 'м'),
        array($seconds, 'с'),
    );
 
    $result = '';
    foreach ($time_arr as $time) {
        if ($time[0] > 0) {
            $result .= $time[0] . ' ' . $time[1] . ' ';
        }
    }
 
    return trim(str_replace(array('мес д', 'д ч', 'ч м', 'м с'), array('мес ', 'д ', 'ч ', 'м '), $result));
}