title: Facebook Chat Bot - How do I test the welcome message?
body: <p>My chat bot is working great but I am having trouble debugging the Welcome message functionality because it only shows up when a conversation is initiated (although i'm pretty sure it's not working having tried it on a colleagues phone). How do I reset my chat so it sees me as a new user interacting with it?</p>
  
  <p>This is my welcome PHP Script at the moment</p>
  
  <pre><code>&lt;?php
  
  function webhook() {
  $challenge = $_REQUEST['hub_challenge'];
  $verify_token = $_REQUEST['hub_verify_token'];
  
  if ($verify_token === 'MYTOKEN') {
    echo $challenge;
  }
  
  $input = json_decode(file_get_contents('php://input'), true); 
  $sender = $input['entry'][0]['messaging'][0]['sender']['id'];
  
  $welcomejson = welcomemessage();
  
  welcomesend($json);
  
  function message() {
  $json = '{
  "setting_type":"call_to_actions",
  "thread_state":"new_thread",
  "call_to_actions":[
       {
        "message":{
        "text":"Welcome to My BOT!"
       }
  }
  ]
  }';
  return $json;
  }
  
  function send($json) {
  $url = 'https://graph.facebook.com/v2.6/MYPAGEID/thread_settings?access_token=MYTOKEN';
  
  //Initiate cURL.
  $ch = curl_init($url);
  
  //Tell cURL that we want to send a POST request.
  curl_setopt($ch, CURLOPT_POST, 1);
  
  //Attach our encoded JSON string to the POST fields.
  curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonData);
  
  //Set the content type to application/json
  curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
  
   //Execute the request
   $result = curl_exec($ch);
  }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/m2R80.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/m2R80.png" alt="exampleofissue"></a></p>