一个小玩意 PHP实现微信红包金额拆分试玩

<meta charset="utf-8">
<?php
// 新年红包金额拆分试玩

class CBonus
{
    public $bonus;//红包
    public $bonus_num;//红包个数
    public $bonus_money;//红包总金额
    public $money_single_max;//单个红包限额

    public function __construct(){
        $this->bonus_num = 10;
        $this->bonus_money = 200;
        $this->money_single_max = 60;
    }

    private function randomFloat($min = 0, $max = 1) {
        $mt_rand = mt_rand();
        $mt_getrandmax = mt_getrandmax();
        echo 'mt_rand=' . $mt_rand . ', mt_getrandmax=' . $mt_getrandmax . '<hr/>';
        return $min + $mt_rand / $mt_getrandmax * ($max - $min);
    }
    //计算
    public function compute()
    {
        $this->bonus = array();
        $bonus_money_temp = $this->bonus_money;
        $money_single_max = $this->money_single_max;
        $i = 1;
        while($i < $this->bonus_num)
        {
            if ($money_single_max > $bonus_money_temp)
            {
                $money_single_max = floatval(sprintf("%01.2f", $bonus_money_temp / 2));//剩余金额不够分时,把剩余金额的一半作为备用金
            }
            $bonus_money_rad = $this->randomFloat(0.01, $money_single_max);//一个红包随机金额 最小的1分钱
            $bonus_money_rad = floatval(sprintf("%01.2f", $bonus_money_rad));
            $bonus_money_temp = $bonus_money_temp - $bonus_money_rad ;//待分配的总剩余金额
            $bonus_money_temp = floatval(sprintf("%01.2f", $bonus_money_temp));
            $this->bonus[] = $bonus_money_rad;
            //echo $bonus_money_rad . ',' . $bonus_money_temp . '<hr/>';
            $i++;
        }
        $this->bonus[] = $bonus_money_temp;//分配剩余金额给最后一个红包
    }
    //打印
    public function output(){
        $total = 0;
        foreach($this->bonus as $k => $v)
        {
            echo '红包' . ($k+1) . '=' . $v . '<br/>';
            $total += $v;
        }
        echo '红包总金额:'.$total;
    }
}

$CBonus = new CBonus();
$CBonus->compute();
$CBonus->output();
?>

演示结果：

红包1=12.36
红包2=24.37
红包3=42.71
红包4=36.92
红包5=25.84
红包6=23.17
红包7=15.92
红包8=1.35
红包9=7.75
红包10=9.61
红包总金额:200

红包1=24.59
红包2=17.66
红包3=29.67
红包4=32.34
红包5=12.67
红包6=37.15
红包7=17.41
红包8=15.23
红包9=6.13
红包10=7.15
红包总金额:200