$tid = date('YmdHis').rand(1000,9999);
$resp = $client->request('POST', 'https://api.mch.weixin.qq.com/v3/marketing/favor/coupon-stocks', [
    'json' => [ // JSON请求体
        'stock_name' => '彤彤爸创建的券',
        "comment"=>"体验券",
        'belong_merchant' => $merchantId,
        'available_begin_time'=>date('Y-m-d',time()+86400).'T'.date('H:i:s').'.120+08:00',
        'available_end_time'=>date('Y-m-d',time()+2*86400).'T'.date('H:i:s').'.120+08:00',
        'stock_use_rule'=>array(
            'max_coupons'=>10,
            'max_amount'=>10,
            'max_coupons_per_user'=>1,
            'natural_person_limit'=>true,
            'prevent_api_abuse'=>true
        ),
        'coupon_use_rule'=>array(
            'coupon_available_time'=>array(
                'second_day_available'=>false,
                'available_time_after_receive'=>30
            ),

            'available_merchants'=>array(
                $merchantId
            ),
            'fixed_normal_coupon'=>array(
                'coupon_amount'=>1,
                'transaction_minimum'=>10
            )
        ),
        'trade_type'=>['OTHER'],
        'combine_use'=>false,
        'no_cash'=>true,
        'stock_type'=>'NORMAL',
        'out_request_no'=>$tid

    ],
    'headers' => [ 'Accept' => 'application/json' ]
]);