title: How to send external link to the telegram group from my bot using php? what should be the value to reply_markup in the link?
body: <p>I am using the telegram bot to send some text with external link in it as a button. i have tried with following code bot i dont know the Json value to send. please, can anybody can help me?</p>
  
  <pre><code>$sendMsg = file_get_contents($boturl."/sendmessage?chat_id=".$chat_id."&amp;text=".$c."&amp;parse_mode=HTML&amp;reply_markup=json_encode("?????")"); 
  </code></pre>
  
  <p>please help me</p>