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：http://mp.weixin.qq.com/wiki/15/5380a4e6f02f2ffdc7981a8ed7a40753.html

获取实例

<?php
use EasyWeChat\Foundation\Application;
// ...
$app = new Application($options);
$broadcast = $app->broadcast;

API

注意：

下面提到的 `$messageType` 、`$message` 可以是：
- `$messageType = Broadcast::MSG_TYPE_NEWS;` 图文消息类型，所对应的 `$message` 为 media_id
- `$messageType = Broadcast::MSG_TYPE_TEXT;` 文本消息类型，所对应的 `$message` 为一个文本字符串
- `$messageType = Broadcast::MSG_TYPE_VOICE;` 语音消息类型，所对应的 `$message` 为 media_id
- `$messageType = Broadcast::MSG_TYPE_IMAGE;` 图片消息类型，所对应的 `$message` 为 media_id
- `$messageType = Broadcast::MSG_TYPE_CARD;` 卡券消息类型，所对应的 `$message` 为 card_id
- `$messageType = Broadcast::MSG_TYPE_VIDEO;` 视频消息为两种情况：
    - 视频消息类型，群发视频消息给**组或预览群发视频消息**给用户时所对应的 `$message` 为`media_id`
    - 群发视频消息**给指定用户**时所对应的 `$message` 为一个数组 `['MEDIA_ID', 'TITLE', 'DESCRIPTION']`

群发消息给所有粉丝

$broadcast->send($messageType, $message);
// 别名方式
$broadcast->sendText("大家好！欢迎使用 EasyWeChat。");
$broadcast->sendNews($mediaId);
$broadcast->sendVoice($mediaId);
$broadcast->sendImage($mediaId);
//视频：
// - 群发给组用户，或者预览群发视频时 $message 为 media_id
// - 群发给指定用户时为数组：[$media_Id, $title, $description]
$broadcast->sendVideo($message);
$broadcast->sendCard($cardId);

群发消息给指定组

$broadcast->send($messageType, $message, $groupId);
// 别名方式
$broadcast->sendText($text, $groupId);
$broadcast->sendNews($mediaId, $groupId);
$broadcast->sendVoice($mediaId, $groupId);
$broadcast->sendImage($mediaId, $groupId);
$broadcast->sendVideo($message, $groupId);
$broadcast->sendCard($cardId, $groupId);

群发消息给指定用户

至少两个用户的openid，必须是数组。

$broadcast->send($messageType, $message, [$openId1, $openId2]);
// 别名方式
$broadcast->sendText($text, [$openId1, $openId2]);
$broadcast->sendNews($mediaId, [$openId1, $openId2]);
$broadcast->sendVoice($mediaId, [$openId1, $openId2]);
$broadcast->sendImage($mediaId, [$openId1, $openId2]);
$broadcast->sendVideo($message, [$openId1, $openId2]);
$broadcast->sendCard($cardId, [$openId1, $openId2]);

发送预览群发消息给指定的 openId 用户

$broadcast->preview($messageType, $message, $openId);
// 别名方式
$broadcast->previewText($text, $openId);
$broadcast->previewNews($mediaId, $openId);
$broadcast->previewVoice($mediaId, $openId);
$broadcast->previewImage($mediaId, $openId);
$broadcast->previewVideo($message, $openId);
$broadcast->previewCard($cardId, $openId);

发送预览群发消息给指定的微信号用户

$broadcast->previewByName($messageType, $message, $wxname);
// 别名方式
$broadcast->previewTextByName($text, $wxname);
$broadcast->previewNewsByName($mediaId, $wxname);
$broadcast->previewVoiceByName($mediaId, $wxname);
$broadcast->previewImageByName($mediaId, $wxname);
$broadcast->previewVideoByName($message, $wxname);
$broadcast->previewCardByName($cardId, $wxname);

删除群发消息

$broadcast->delete($msgId);

查询群发消息发送状态

$broadcast->status($msgId);

有关群发信息的更多细节请参考微信官方文档：http://mp.weixin.qq.com/wiki/