抽奖权重算法
2021-03-14 01:29
标签：fun UNC data cal function and rate dom code 算法实现 抽奖权重算法 标签：fun UNC data cal function and rate dom code 原文地址：https://www.cnblogs.com/jansang/p/14044220.htmlpublic function caleResult()
{
$data = [
[‘id‘ => 1, ‘name‘ => ‘一等奖‘, ‘weight‘ => 5],
[‘id‘ => 2, ‘name‘ => ‘二等奖‘, ‘weight‘ => 10],
[‘id‘ => 3, ‘name‘ => ‘三等奖‘, ‘weight‘ => 25],
[‘id‘ => 4, ‘name‘ => ‘四等奖‘, ‘weight‘ => 60],
];
//计算总权重
$total = 0;
foreach ($data as $val) {
$total += $val[‘weight‘];
}
$rate = 0;
$result = [];
$random = mt_rand(1, $total);
foreach ($data as $val) {
$rate += $val[‘weight‘];
if ($random > $rate) {
continue;
}
$result = $val;
}
return $result;
}