获取时间戳

/**

 * 取与某个日期指定天数差的日期

 */

function getOneDate($days = 1, $date = null) {

if (!is_int($days)) {

$days = 0;

}

$objDate = new DateTime($date);

$objDate->modify("$days day");

return $objDate->format('Y-m-d');

}