裂变红包 php

<?php
class RedPacket {
    private $totalAmount;
    private $totalCount;
    private $remainingAmount;
    private $remainingCount;
    private $packets;

    public function __construct($totalAmount, $totalCount) {
        $this->totalAmount = $totalAmount;
        $this->totalCount = $totalCount;
        $this->remainingAmount = $totalAmount;
        $this->remainingCount = $totalCount;
        $this->packets = [];
        $this->generatePackets();
    }

    private function generatePackets() {
        for ($i = 0; $i < $this->totalCount; $i++) {
            if ($i == $this->totalCount - 1) {
                $packetAmount = $this->remainingAmount;
            } else {
                $packetAmount = round(rand(1, $this->remainingAmount / $this->remainingCount) * 100) / 100;
            }
            $this->packets[] = $packetAmount;
            $this->remainingAmount -= $packetAmount;
            $this->remainingCount--;
        }
    }

    public function getPacket($userId) {
        if ($this->remainingCount > 0) {
            $packet = array_shift($this->packets);
            $this->remainingCount--;
            return $packet;
        } else {
            return false;
        }
    }
}

// 示例使用
$redPacket = new RedPacket(100, 10); // 总金额100元，总数量10个
$packet = $redPacket->getPacket(1); // 用户1领取红包
if ($packet !== false) {
    echo "用户1领取了红包: " . $packet . "元";
} else {
    echo "红包已领完";
}
?>