?php/ * @param $total [你要发的红包总额] * @param int $num [发几个] @return array [生成红包金额] /function getRedGift($total, $num = 10) {
$min = 0.01;//最小的红包金额$wamp = array();
$returnData = array();
for ($i = 1; $i  $num; $i++) {
  $safe_total = ($total - ($num - $i) * $min) / ($num - $i); //当前允许红包金额的最大值if ($safe_total  0) {//如果红金金额的最大值小于0就跳出循环break; 
  }
  $money = @mt_rand($min * 100, $safe_total * 100) / 100; //随机产生一个红包金额, mt_rand(min,max)是生成min到max的随机整数,包含min和max,所以为了生成的红包金额有小数,所以*100先,再100$total = $total - $money; //剩余红包总额$wamp[$i] = round($money, 2); //保留两位有效数字}
$wamp[$i] = round($total, 2);//最后一个红包金额$returnData['MoneySum'] = $w
$returnData['newTotal'] = array_sum($wamp);//array_sum是计算数组中所有值的和 return $returnData;
}
//测试$data = getRedGift(100, 10);
echo 'pre>';
print_r($data);
?>