/**
* @param $value
* @param $charlist
* @param bool $utf8
*
* @return null|string
*/
public static function trimAsNULL($value, $charlist = NULL, $utf8 = TRUE)
{
if (NULL !== $value) {
if ($utf8) {
$value = Kohana_UTF8::trim($value, $charlist);
if (!Kohana_UTF8::strlen($value)) {
$value = NULL;
}
} else {
$value = trim($value, $charlist);
if (!strlen($value)) {
$value = NULL;
}
}
}
return $value;
}
