這篇文章主要介紹了一個抽獎程序，要求一等獎的中獎概率是0.12%，二等獎中獎概率是3%，三等獎中獎概率是12%，其他中獎概率是都是謝謝惠顧
代碼如下: <?php /** * 抽獎 * @param int $total */ function getReward($total=1000) { $win1 = floor((0.12*$total)/100); $win2 = floor((3*$total)/100); $win3 = floor((12*$total)/100); $other = $total-$win1-$win2-$win3; $return = array(); for ($i=0;$i<$win1;$i++) { $return[] = 1; } for ($j=0;$j<$win2;$j++) { $return[] = 2; } for ($m=0;$m<$win3;$m++) { $return[] = 3; } for ($n=0;$n<$other;$n++) { $return[] = '謝謝惠顧'; } shuffle($return); return $return[array_rand($return)]; } $data = getReward(); echo $data; ?>
