PHP 将一个数分成区间的数

/**
 * money数值
 * num分成数量
 * min最小值
 * max最大值
 */
public function getBonus($money=300, $num=750, $min=0.3, $max=0.5)
    {
        $data = array();
        if ($min * $num > $money) {
            return array();
        }
        if ($max * $num < $money) {
            return array();
        }
        while ($num >= 1) {
            $num--;
            $kmix = max($min, $money - $num * $max);
            $kmax = min($max, $money - $num * $min);
            $kAvg = $money / ($num + 1);
            //获取最大值和最小值的距离之间的最小值
            $kDis = min($kAvg - $kmix, $kmax - $kAvg);
            //获取0到1之间的随机数与距离最小值相乘得出浮动区间，这使得浮动区间不会超出范围
            $r = ((float)(rand(1, 10000) / 10000) - 0.5) * $kDis * 2;
            $k = round($kAvg + $r, 2);
            $money -= $k;
            $data[] = $k;
        }
        print_r($data);
    }