企业宣传网站案例产品推广计划

date_default_timezone_set('prc');/*** 求取从某日起经过一定天数后的日期,* 排除周六周日和节假日* @param $start       开始日期* @param $offset      经过天数* @param $exception 例外的节假日* @param $allow       允许的日期(预留参数)* @return*  examples:输入(2010-06-25,5,''),得到2010-07-02*/function getendday( $start='now', $offset=0, $exception='', $allow='' ){//先计算不排除周六周日及节假日的结果$starttime = strtotime($start);$endtime = $starttime + $offset * 24 * 3600;$end = date('y-m-d', $endtime);//然后计算周六周日引起的偏移$weekday = date('n', $starttime);//得到星期值：1-7$remain = $offset % 7;$newoffset = 2 * ($offset - $remain) / 7;//每一周需重新计算两天if( $remain > 0 ){//周余凑整$tmp = $weekday + $remain;if( $tmp >= 7 ){$newoffset += 2;}else if( $tmp == 6 ){$newoffset += 1;}//考虑当前为周六周日的情况if( $weekday == 6 ){$newoffset -= 1;}else if( $weekday == 7 ){$newoffset -= 2;}}//再计算节假日引起的偏移if( is_array($exception) ){//多个节假日foreach ($exception as $day){$tmp_time = strtotime($day);if( $tmp_time>$starttime && $tmp_time<=$endtime ){//在范围(a,b]内$weekday_t = date('n', $tmp_time);if($weekday_t <= 5){//防止节假日与周末重复$newoffset += 1;}}}}else{//单个节假日if( $exception!='' ){$tmp_time = strtotime($exception);if( $tmp_time>$starttime && $tmp_time<=$endtime ){$weekday_t = date('n', $tmp_time);if($weekday_t <= 5){$newoffset += 1;}}}}//根据偏移天数，递归做等价运算111cn.netif($newoffset > 0){#echo "[{$start} -> {$offset}] = [{$end} -> {$newoffset}]"."
n";return getendday($end,$newoffset,$exception,$allow);}else{return $end;}}/*** 暴力循环方法*/function getendday2( $start='now', $offset=0, $exception='', $allow='' ){$starttime = strtotime($start);$tmptime = $starttime + 24*3600;while( $offset > 0 ){$weekday = date('n', $tmptime);$tmpday = date('y-m-d', $tmptime);$bfd = false;//是否节假日if(is_array($exception)){$bfd = in_array($tmpday,$exception);}else{$bfd = ($exception==$tmpday);}if( $weekday<=5 && !$bfd){//不是周末和节假日$offset--;#echo "tmpday={$tmpday}"."
";}$tmptime += 24*3600;}return $tmpday;}$exception = array('2010-01-01','2010-01-02','2010-01-03','2010-04-03','2010-04-04','2010-04-05','2010-05-01','2010-05-02','2010-05-03','2010-06-14','2010-06-15','2010-06-16','2010-09-22','2010-09-23','2010-09-24','2010-10-01','2010-10-02','2010-10-03','2010-10-04','2010-10-05','2010-10-06','2010-10-07',);//echo getendday('2010-08-27',3,'');//echo getendday('2010-06-25',15,'2010-07-07');$t1 = microtime();echo getendday('2010-05-12',66,$exception)."
";$t2 = microtime();echo "use ".($t2-$t1)." s
";echo getendday2('2010-05-12',66,$exception)."
";$t3 = microtime();echo "use ".($t3-$t2)." s
";