src/Stats/Stats.php
public function freeCardSummary($from, $to, $condSource = 0, $cardId = '')
    {
        $ext = [
            'cond_source' => intval($condSource),
            'card_id' => $cardId,
        ];

        return $this->query(self::API_FREE_CARD_SUMMARY, $from, $to, $ext);
    }
public function freeCardSummary($from, $to, $condSource = 0, $cardId = '')
    {
        $ext = [
            'cond_source' => intval($condSource),
            'card_id' => $cardId,
        ];

        return $this->query(self::API_FREE_CARD_SUMMARY, $from, $to, $ext);
    }
获取免费券数据接口.

@param string $from
@param string $to
@param int    $condSource
@param string $cardId

@return \EasyWeChat\Support\Collection