Drupal爱好者

/**
* 取得后几天的日期函数 
*
* @param unknown_type $sDate 日期
* @param unknown_type $month_ 要减几个月
* @param unknown_type $day_ 要减几天
* @param unknown_type $year 要减几年
* @return unknown
*/
function _mktime($sDate,$month_ = 0, $day_ = 0, $year = 0)
{
if (empty($year_))
{
$year_ = 0;
}
$year = substr($sDate, 0 , 4);
$month = substr($sDate, 5, 2);
$day = substr($sDate, 8, 2);
$hour = substr($sDate, 11, 2);
$minute = substr($sDate, 14, 2);
$second = substr($sDate, 17, 2);
return date("Y-m-d",mktime($hour, $minute, $second, $month - $month_, $day - $day_, $year-$year_));
}