/**
* 开奖
*
* @param $lid
* @param $city_id
* @param $property
* @return array
*/
public static function calculate_lucky_draw($lid, $city_id, $property, $lucky_draw_times, $lucky_times)
{
$lucky_draw_prize = Dao_Cms_LuckyDrawPrize::get_prize_list($lid);
/** 过滤地区 */
$lucky_draw_prize = Bll_Cms_LuckyDrawLuckyArea::filter_lucky_prize($lucky_draw_prize, $city_id, $lid);
/** 过滤积分 */
$lucky_draw_prize = Bll_Cms_LuckyDrawLuckyProperty::filter_lucky_prize($lucky_draw_prize, $lid, $property);
if (empty($lucky_draw_prize)) {
return array('status' => 0, 'message' => '谢谢参与', 'prize_id' => 0, 'debug' => __CLASS__, 'debug_info' => __LINE__, 'prize_title' => '谢谢参与');
}
/** 计算各奖品的中奖区间 */
$max = mt_getrandmax();
$lucky_number = mt_rand() % $max;
// 中奖号码
$luck_prize = array();
$start = 0;
foreach ($lucky_draw_prize as $prize) {
@file_put_contents('/home/www/' . __CLASS__ . '.log', "{$prize['title']}: ", FILE_APPEND);
$probability = explode('/', $prize['probability']);
if (count($probability) != 2) {
continue;
}
list($dividend, $divisor) = $probability;
if ($dividend == 0 || $divisor == 0) {
continue;
}
$probability = $dividend / $divisor;
if ($lucky_times == 0 && $prize['mulriple'] == 1) {
$probability = $probability * (1 << $lucky_draw_times);
}
$end = min(floor($max * $probability + $start), $max);
@file_put_contents('/home/www/' . __CLASS__ . '.log', "max={$max}\tstart={$start}\tend={$end}\tLucky={$lucky_number}\n", FILE_APPEND);
if ($lucky_number >= $start && $lucky_number < $end) {
$luck_prize = $prize;
break;
}
$start = $end;
}
if (empty($luck_prize)) {
return array('status' => 0, 'message' => '谢谢参与', 'prize_id' => 0, 'debug' => __CLASS__, 'debug_info' => __LINE__, 'prize_title' => '谢谢参与');
}
return array('status' => $luck_prize['id'], 'message' => $luck_prize['title'], 'prize_id' => $luck_prize['prize_id'], 'prize_title' => $luck_prize['title'], 'lucky_prize' => $luck_prize);
}
