PHP抽奖算法有关问题

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Release: 2016-06-13 10:19:52
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PHP抽奖算法问题
现在要做一个抽奖的活动
 中奖概率具体如下:
一等奖 5%
二等奖 10%
三等奖 60%
参与奖 25%

我的思路很笨 :
我是随机一个0-100的数,然后按照中奖概率 来划分区间 
一等奖 96-100
二等奖 86-95
三等奖 26-85
参与奖 1-25

没接触过算法 请大神们帮忙

------解决方案--------------------
楼主这个想法可以的

PHP code
<?php $arr=array(5=>'一等奖',10=>'二等奖',60=>'三等奖',25=>'参与奖');$pool=array();foreach($arr as $k=>$v)//构造奖池    $pool+=array_fill(count($pool),$k,$v);echo $pool[rand(0,99)];//开始抽奖<div class="clear">
                 
              
              
        
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