src/Broadcast/Broadcast.php
public function send($msgType, $message, $to = null)
    {
        $message = (new MessageBuilder())->msgType($msgType)->message($message)->to($to)->build();

        $api = is_array($to) ? self::API_SEND_BY_OPENID : self::API_SEND_BY_GROUP;

        return $this->post($api, $message);
    }
public function send($msgType, $message, $to = null)
    {
        $message = (new MessageBuilder())->msgType($msgType)->message($message)->to($to)->build();

        $api = is_array($to) ? self::API_SEND_BY_OPENID : self::API_SEND_BY_GROUP;

        return $this->post($api, $message);
    }
Send a message.

@param string $msgType message type
@param mixed  $message message
@param mixed  $to

@return mixed