public function value()
{
if (func_num_args() == 1) {
$v = func_get_arg(0);
// ctype_digit will fail on timestamps in the past, so typecast here
if (substr($v, 0, 1) == '-' && ctype_digit(substr($v, 1))) {
$v = (int) $v;
}
if (is_int($v) || ctype_digit($v)) {
$v = strftime($this->datetime_format, (int) $v);
}
// unset default field value
if ($v == 'MM/DD/YYYY HH:MM:SS') {
$v = '';
}
parent::value($v);
} else {
return parent::value();
}
}
