[PHP] pobierz, plaintext 
$integer = 2001929823;
echo array_sum(str_split($integer));
[PHP] pobierz, plaintext 

[PHP] pobierz, plaintext 
function str_split($text, $split = 1)
{
if (!is_string($text)) return false;
if (!is_numeric($split) && $split < 1) return false;
$len = strlen($text);
$array = array();
$s = 0;
$e=$split;
while ($s <$len)
    {
        $e=($e <$len)?$e:$len;
        $array[] = substr($text, $s,$e);
        $s = $s+$e;
    }
return $array;
}
}
[PHP] pobierz, plaintext