TelegramBot Webhook is set, but it doesn't work
<p>I have some questions about setting the Webhook in <code>TelegramBot</code>. At first I followed a YouTube tutorial. I hosted free webspace at <a href="https://www.lima-city.de/" rel="nofollow">lima-city.de (lang-DE)</a> with an SSL certificate and set the Webhook with
<a href="https://api.telegram.org/bot183900136:AAEk7QYske1vtpl9GlR_-7KMye2g6jMfynQ/setwebhook?url=https://telegram-bot.lima-city.de/helloworld.php" rel="nofollow">https://api.telegram.org/bot183900136:AAEk7QYske1vtpl9GlR_-7KMye2g6jMfynQ/setwebhook?url=https://telegram-bot.lima-city.de/helloworld.php</a></p>

<p>Is used the following code:</p>

<pre><code>$botToken = "MyBotToken";
$website = "https://api.telegram.org/bot".$botToken;
$update = file_get_contents("php://input");
file_get_contents($website."/sendmessage?chat_id=217296540&amp;text=hi");
</code></pre>

<p>But my Bot doesn't react to my messages. Here are some tips from <code>TelegramBot</code>:</p>

<ol>
<li>You will not be able to receive updates using <code>getUpdates</code> for as long as an outgoing Webhook is set up.  </li>
<li>To use a self-signed certificate, you need to upload your public key certificate using certificate parameter. Please upload as <code>InputFile</code>, sending a String will not work.  </li>
<li>Ports currently supported for Webhooks: 443, 80, 88, 8443.</li>
</ol>

<p>I don't know what I could do next to solve the problem.</p>