Telegram bot doesn't respond to messages in channel?
<p>I have created a channel in telegram and I added a bot as an administrator of the channel. When I send a message to channel the bot doesn't answer, why? </p>

<p>I can send a message with <b>/sendmessage</b></p>

<p><a href="https://api.telegram.org/bot[key]/sendmessage?chat_id=@MyChannelID&amp;text=This" rel="nofollow noreferrer">https://api.telegram.org/bot[key]/sendmessage?chat_id=@MyChannelID&amp;text=This</a> text is from bot to channel.</p>

<p>I am using: <a href="https://github.com/Eleirbag89/TelegramBotPHP" rel="nofollow noreferrer">https://github.com/Eleirbag89/TelegramBotPHP</a> </p>

<p>And this is a simple test code for bot:</p>

<pre><code> &lt;?php 

include 'connection.php';
include("Telegram.php");
define('bot_id', '227493781:AAE2x0l3BRrjGN3S8wMVo9zOTYbbwr8');
$telegram = new Telegram(bot_id);

$text = $telegram-&gt;Text();
$chat_id = $telegram-&gt;ChatID();

if ($text == "call") {
    $content = array('chat_id' =&gt; $chat_id, 'text' =&gt; "This is test     message!!!");
    $telegram-&gt;sendMessage($content);   
 }

?&gt;
</code></pre>