i write this code :
<?php
$date = explode('-', gmdate('m-d-Y-H-i', CURRENT_TIME + $Info->option['timezone']*3600));
$month = intval($date[0]); // for update with option form
$day = intval($date[1]);
$year = intval($date[2]);
$time = $date[3] .":". $date[4]; ?>
so
<?php
$this->data["ptime"] = gmmktime($hour, $minute, 0, $this->data["month"], $this->data["day"], $this->data["year"]) - $Info->option['timezone']*3600; ?>
and INSERT $this->data["ptime"] in table . but with this save date & time with unix timestamp .