本文实例讲述了PHP大转盘中奖概率算法的实现方法,分享给大家供大家参考。具体如下:
大转盘是最近很多线上网动中一个比较有意思的东西了,下面我们就来看看这个大转盘中奖概率算法与例子,希望对各位有所帮助。
这是一个APP客户端有大转盘抽奖算法,具体如何抽奖当然在我们服务端实现了。下面和大家简单分享一下实现代码:
$prize_arr = array(
'0' => array('id'=>1,'prize'=>'平板电脑','v'=>1),
'1' => array('id'=>2,'prize'=>'数码相机','v'=>5),
'2' => array('id'=>3,'prize'=>'音箱设备','v'=>10),
'3' => array('id'=>4,'prize'=>'4G优盘','v'=>12),
'4' => array('id'=>5,'prize'=>'10Q币','v'=>22),
'5' => array('id'=>6,'prize'=>'下次没准就能中哦','v'=>50),
);
$actor = 100;
foreach ($prize_arr as $v) {
$arr[$v['id']] = $v['v'];
}
foreach ($arr as &$v) {
$v = $v*$actor;
}
asort($arr);
$sum = array_sum($arr); //总概率
$rand = mt_rand(1,$sum);
$result = ''; //中奖产品id
foreach ($arr as $k => $x)
{
if($rand {
$result = $k;
break;
}
else
{
$rand -= $x;
}
}
$res['yes'] = $prize_arr[$result-1]['prize']; //中奖项
print_r($res);
希望本文所述对大家的PHP程序设计有所帮助。

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