php 排除週末與公休日程式實例代碼

php教程 排除週末與公休日程式實例代碼


date_default_timezone_set('prc');


/**


* 求取從某日起經過一定天數後的日期,


* 排除週六周日和公休日


* @param $start       開始日期


* @param $offset      經過天數


* @param $exception 例外的公休日


* @param $allow       允許的日期(預留參數)


* @return


*  examples:輸入(2010-06-25,5,''),得到2010-07-02


*/


function getendday( $start='now', $offset=0, $exception='', $allow='' ){


    //先計算不排除週六周日及公休日的結果


    $starttime = strtotime($start);


    $endtime = $starttime + $offset * 24 * 3600;


    $end = date('y-m-d', $endtime);


    //然後計算週六周日引起的偏移


$weekday = date('n', $starttime);//得到星期值：1-7


    $remain = $offset % 7;


    $newoffset = 2 * ($offset - $remain) / 7;//每一周需重新計算兩天


    if( $remain > 0 ){//周余湊整


        $tmp = $weekday + $remain;


        if( $tmp >= 7 ){


            $newoffset += 2;


        }else if( $tmp == 6 ){


            $newoffset += 1;


        }


        //考慮當前為週六周日的情況


        if( $weekday == 6 ){


$newoffset -= 1;


        }else if( $weekday == 7 ){


            $newoffset -= 2;


        }


    }


    //再計算公休日引起的偏移


    if( is_array($exception) ){//多個公休日


        foreach ($exception as $day){


            $tmp_time = strtotime($day);


            if( $tmp_time>$starttime && $tmp_time<=$endtime ){//在範圍(a,b]內


                $weekday_t = date('n', $tmp_time);


if($weekday_t <= 5){//防止公休日與週末重複


                    $newoffset += 1;


                }


            }


        }


    }else{//單個公休日


        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;


                }


            }


        }


       


    }


    //根據偏移天數，遞迴做等價運算jzread.com


    if($newoffset > 0){


#echo "[{$start} -> {$offset}] = [{$end} -> {$newoffset}]"." <br />n";


        return getendday($end,$newoffset,$exception,$allow);


    }else{


        return $end;


    }


}


/**


* 暴力迴圈方法


*/


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;//是否公休日


        if(is_array($exception)){


            $bfd = in_array($tmpday,$exception);


        }else{


            $bfd = ($exception==$tmpday);


        }


        if( $weekday<=5 && !$bfd){//不是週末和公休日


            $offset--;


            #echo "tmpday={$tmpday}"." <br />";


        }


        $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)." <br />";


$t2 = microtime();echo "use ". ($t2-$t1)." s <br />";


echo getendday2('2010-05-12',66,$exception)." <br />";


$t3 = microtime();echo "use ". ($t3-$t2)." s <br />";