PHP实现微信红包金额拆分试玩的算法示例

<?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();?>