/**
*
* @param $packet_total 红包总额
* @param $packet_count 红包个数
* @param $packet_max 每个小红包的最大额
* @param $packet_min 每个小红包的最小额
* @return 存放生成的每个小红包的值的一维数组
*/
public function getpacket() {
$father_toal = $packet_total = input('packet_total');
$packet_count = input('packet_count');
$middle = $packet_count/2; //用于判断用那种方法发红包
//当已经分配了半数后最小值用$packet_min
$packet_min = ($packet_total/$packet_count)*0.1;
//当已经分配了小于半数时最小值用$packet_min1
$packet_min1 = ($packet_total/$packet_count)*0.5;
if($packet_min<0.01 && $packet_min1<0.01){
return json_encode(array('status'=>0,'msg'=>"金额太少，红包数太多，小气鬼！"));
}
$n = $packet_count;
for ($i = 0; $i < $packet_count - 1; $i++) {
if($i <= $middle){
$safe_total1 = (($packet_total - ($packet_count - $i) * $packet_min1) / ($packet_count - $i))*5; //随机安全上限
$money = mt_rand($packet_min1 * 100, $safe_total1 * 100) / 100;
if($money<=0){
echo "hello";break;
}
$result[] = round($money,2);
$packet_total = $packet_total - $money;
}else{
$safe_total = ($packet_total - ($packet_count - $i) * $packet_min) / ($packet_count - $i); //随机安全上限
$money = mt_rand($packet_min * 100, $safe_total * 100) / 100;
if($money<=0){
$money = 0.01;
}
$result[] = $money;
$packet_total = $packet_total - $money;
}
}
$left_money = $father_toal - array_sum($result);
$result[] = $left_money;
return json_encode($result);
}