一个简单php 抽奖小程序

一个抽奖小程序,概论可控,也可某个奖品在前端显示,而程序中根本不可能获得,把所有的概率x10后相加起来,新数组中每项的值等于它前几个的和加上它本身,然后随即生成一个0到最大数之间的一个数,通过循环查看它属于那个区间,返回该区间的key,代码如下:

<?php
$prize = array(
    1 => 3.5, //3.5%机率
    2 => 2.5,
    3 => 6,
    4 => 2,
    5 => 42, //42%机率
    6 => 36,
    7 => 2,
    8 => 4,
    9 => 2
);
//最后确认相加等于100
$prizeList = array(
    1 => array(
        &#39;小仙子&#39;
    ) ,
    2 => array(
        &#39;5Q币&#39;
    ) ,
    3 => array(
        &#39;38888游戏币&#39;
    ) ,
    4 => array(
        &#39;88888游戏币&#39;
    ) ,
    5 => array(
        &#39;谢谢参与!&#39;
    ) ,
    6 => array(
        &#39;欢迎下次再来！&#39;
    ) ,
    7 => array(
        &#39;10Q币&#39;
    ) ,
    8 => array(
        &#39;888银元宝（绑定）&#39;
    ) ,
    9 => array(
        &#39;随机高级坐骑（绑定）&#39;
    )
);
//unset($prize[7]); 直接把10Q这个奖品去掉
$times = 10;
$max = 0;
foreach ($prize as $k => $v) {
    $max = $v * $times + $max;
    $row[&#39;v&#39;] = $max;
    $row[&#39;k&#39;] = $k;
    $prizeZone[] = $row;
}
$max--; //临界值
$rand = mt_rand(0, $max);
$zone = 1;
foreach ($prizeZone as $k => $v) {
    if ($rand >= $v[&#39;v&#39;]) {
        if ($rand >= $prizeZone[$k + 1][&#39;v&#39;]) {
            continue;
        } else {
            $zone = $prizeZone[$k + 1][&#39;k&#39;];
            break;
        }
    }
    $zone = $v[&#39;k&#39;];
    break;
}
print_r($prizeList[$zone][0]);
?>