群发
微信的群发消息接口有各种乱七八糟的注意事项及限制，具体请阅读微信官方文档。
发送消息
以下所有方法均有第二个参数 $to 用于指定接收对象：
- 当
$to为整型时为标签 id- 当
$to为数组时为用户的 openid 列表（至少两个用户的 openid）- 当
$to为null时表示全部用户
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$app->broadcasting->sendMessage(Message $message, array | int $to = null);下面的别名方法 sendXXX 都是基于上面 sendMessage 方法的封装。
文本消息
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$app->broadcasting->sendText("大家好！欢迎使用 EasyWeChat。");
// 指定目标用户
// 至少两个用户的 openid，必须是数组。
$app->broadcasting->sendText("大家好！欢迎使用 EasyWeChat。", [$openid1, $openid2]);
// 指定标签组用户
$app->broadcasting->sendText("大家好！欢迎使用 EasyWeChat。", $tagId); // $tagId 必须是整型数字图文消息
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$app->broadcasting->sendNews($mediaId);
$app->broadcasting->sendNews($mediaId, [$openid1, $openid2]);
$app->broadcasting->sendNews($mediaId, $tagId);图片消息
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$app->broadcasting->sendImage($mediaId);
$app->broadcasting->sendImage($mediaId, [$openid1, $openid2]);
$app->broadcasting->sendImage($mediaId, $tagId);语音消息
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$app->broadcasting->sendVoice($mediaId);
$app->broadcasting->sendVoice($mediaId, [$openid1, $openid2]);
$app->broadcasting->sendVoice($mediaId, $tagId);视频消息
用于群发的视频消息，需要先创建消息对象，
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// 1. 先上传视频素材用于群发：
$video = '/path/to/video.mp4';
$videoMedia = $app->media->uploadVideoForBroadcasting($video, '视频标题', '视频描述');
// 结果如下：
//{
// "type":"video",
// "media_id":"IhdaAQXuvJtGzwwc0abfXnzeezfO0NgPK6AQYShD8RQYMTtfzbLdBIQkQziv2XJc",
// "created_at":1398848981
//}
// 2. 使用上面得到的 media_id 群发视频消息
$app->broadcasting->sendVideo($videoMedia['media_id']);卡券消息
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$app->broadcasting->sendCard($cardId);
$app->broadcasting->sendCard($cardId, [$openid1, $openid2]);
$app->broadcasting->sendCard($cardId, $tagId);发送预览群发消息给指定的 openId 用户
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$app->broadcasting->previewText($text, $openId);
$app->broadcasting->previewNews($mediaId, $openId);
$app->broadcasting->previewVoice($mediaId, $openId);
$app->broadcasting->previewImage($mediaId, $openId);
$app->broadcasting->previewVideo($message, $openId);
$app->broadcasting->previewCard($cardId, $openId);发送预览群发消息给指定的微信号用户
$wxanme 是用户的微信号，比如：notovertrue
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$app->broadcasting->previewTextByName($text, $wxname);
$app->broadcasting->previewNewsByName($mediaId, $wxname);
$app->broadcasting->previewVoiceByName($mediaId, $wxname);
$app->broadcasting->previewImageByName($mediaId, $wxname);
$app->broadcasting->previewVideoByName($message, $wxname);
$app->broadcasting->previewCardByName($cardId, $wxname);删除群发消息
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$app->broadcasting->delete($msgId);查询群发消息发送状态
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$app->broadcasting->status($msgId);