關於微信公衆號卡券那些事

主要介紹以下兩種微信公衆平臺髮卡券的形式

1、發送到公衆號對話框中

2、Js領取卡券

第一種：

封裝髮卡券的方法

function SendCard($fromUsername, $card_id,$access_token)
    {
    	$postdata ='{
    		"touser": "' . $fromUsername . '", 
    		"wxcard": {
    			"card_id": "' . $card_id . '"
    		}, 
    		"msgtype": "wxcard"
    	}';
    	$opts = array(
    		'http' => array(
    			'method' => 'POST',
    			'Content-Length' => strlen($postdata),
    			'Host' => 'api.weixin.qq.com',
    			'Content-Type' => 'application/json',
    			'content' => $postdata
    			)
    		);
    	$context = stream_context_create($opts);
    	$result = file_get_contents('https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token='.$access_token, true, $context);
    	echo $result;
}

調用髮卡券的方法

$resultCode=SendCard($fromUsername, $card_id,$access_token);

給用戶推送一個卡券領取的圖文回覆

​
$title ="恭喜您獲得".$one['goods_name']."實物券，點擊領取";
$decription = '實物券';
$PicUrl = '圖片路徑';
$Url='圖片鏈接';
$resultStr = sprintf($singleimg, $fromUsername, $toUsername, $time, $title, $decription, $PicUrl, $Url);
echo $resultStr;
exit(0);

​

第二種：

問題1：微信卡券到領取卡券頁面領取不了顯示“簽名錯誤”

解決：jsapi需要簽名，這個簽名用到的是jsapi_ticket 根據jsapi_ticket 生成簽名。

           接口：https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken

           參數：需要生成jsapi的簽名、時間戳、隨機字符串、appid

           傳入參數如圖：

wx.config({
	debug: false,
	appId: '你的appid',
	timestamp: <?php echo $signPackage["timestamp"];?>,
	nonceStr: '<?php echo $signPackage["nonceStr"];?>',
	signature: "<?php echo $signPackage['signature'];?>",
	jsApiList: [
		'addCard',//添加卡券

	]
});

          卡券也需要簽名，這個簽名用到的是WxCardApiTicket

           接口：https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=wx_card&access_token=$accessToken

           參數：card_id、卡券時間戳、卡券隨機字符串、卡券的簽名

           傳入參數如圖：

wx.addCard({
	cardList: [
	{
		cardId: "你的card_id",cardExt: '{"timestamp":"<?php echo $signcard['timestamp'];?>",
		"nonce_str":"<?php echo $signcard['nonce_str'];?>","signature":"<?php echo $signcard['signature'];?>"}'
	}
	],
	success: function (res) {
	    wx.closeWindow();
		WeixinJSBridge.call('closeWindow');
	},
	cancel: function (res) {
		wx.closeWindow();
		WeixinJSBridge.call('closeWindow');
	},
});

附件：生成jsapi簽名、生成卡券簽名

class JSSDK {
	private $appId;
	private $appSecret;

	public function __construct($appId, $appSecret) {
		$this->appId = $appId;
		$this->appSecret = $appSecret;
	}
	public function getSignPackage() {
		$jsapiTicket = $this->getJsApiTicket();
    	// 注意 URL 一定要動態獲取，不能 hardcode.
		$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
		$url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
		$timestamp = time();
		$nonceStr = $this->createNonceStr();
    	// 這裏參數的順序要按照 key 值 ASCII 碼升序排序
		$string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";
		$signature = sha1($string);
		$signPackage = array(
			"appId"     => $this->appId,
			"nonceStr"  => $nonceStr,
			"timestamp" => $timestamp,
			"url"       => $url,
			"signature" => $signature,
			"rawString" => $string
			);
		return $signPackage; 
	}
	public function getcardSign() {//卡券簽名
		$nonceStr = $this->createNonceStr();
		$sign['api_ticket']=$this->getWxCardApiTicket();
		$sign['timestamp']=time();
		$sign['card_id']='你的card_id';
		$sign['nonce_str']=$this->createNonceStr();
		asort($sign,2);
		$buff="";
		foreach ($sign as $k => $v) {
			$buff.=$v;
		}
		$signature=sha1($buff);
		return array('timestamp'=>$sign['timestamp'],'nonce_str'=>$sign['nonce_str'],'signature'=>$signature); 
	}
	private function createNonceStr($length = 16) {
		$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
		$str = "";
		for ($i = 0; $i < $length; $i++) {
			$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
		}
		return $str;
	}
	private function getJsApiTicket() {
    	// jsapi_ticket 應該全局存儲與更新，以下代碼以寫入到文件中做示例
		$data = json_decode(file_get_contents("jsapi_ticket.json"));
		if ($data->expire_time < time()) {
			$accessToken = $this->getAccessToken();
      		// 如果是企業號用以下 URL 獲取 ticket
      		// $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";
			$url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
			$res = json_decode($this->httpGet($url));
			$ticket = $res->ticket;
			if ($ticket) {
				$data->expire_time = time() + 7000;
				$data->jsapi_ticket = $ticket;
				$fp = fopen("jsapi_ticket.json", "w");
				fwrite($fp, json_encode($data));
				fclose($fp);
			}
		} else {
			$ticket = $data->jsapi_ticket;
		}

		return $ticket;
	}

	private function getAccessToken() {
    // access_token 應該全局存儲與更新，以下代碼以寫入到文件中做示例
		$data = json_decode(file_get_contents("access_token.json"));
		if ($data->expire_time < time()) {
      // 如果是企業號用以下URL獲取access_token
      // $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret";
			$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
			$res = json_decode($this->httpGet($url));
			$access_token = $res->access_token;
			if ($access_token) {
				$data->expire_time = time() + 7000;
				$data->access_token = $access_token;
				$fp = fopen("access_token.json", "w");
				fwrite($fp, json_encode($data));
				fclose($fp);
			}
		} else {
			$access_token = $data->access_token;
		}
		return $access_token;
	}
	private function getWxCardApiTicket(){

    // jsapi_ticket 應該全局存儲與更新，以下代碼以寫入到文件中做示例
		$data = json_decode(file_get_contents("wxcard_api_ticket.json"));
		if ($data->expire_time < time()) {
			$accessToken = $this->getAccessToken();
      // 如果是企業號用以下 URL 獲取 ticket
      // $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";
			$url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=wx_card&access_token=$accessToken";
			$res = json_decode($this->httpGet($url));
			$ticket = $res->ticket;
			if ($ticket) {
				$data->expire_time = time() + 7000;
				$data->jsapi_ticket = $ticket;
				$fp = fopen("wxcard_api_ticket.json", "w");
				fwrite($fp, json_encode($data));
				fclose($fp);
			}
		} else {
			$ticket = $data->jsapi_ticket;
		}

		return $ticket;


	}


	private function httpGet($url) {
		$curl = curl_init();
		curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($curl, CURLOPT_TIMEOUT, 500);
		curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
		curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
		curl_setopt($curl, CURLOPT_URL, $url);

		$res = curl_exec($curl);
		curl_close($curl);

		return $res;
	}
}
$jssdk = new JSSDK("你的appid", "你的secret");
$signPackage = $jssdk->GetSignPackage();//jaspi簽名
$signcard=$jssdk->getcardSign();//卡券簽名