<script type="text/javascript" charset="utf-8">
      $(document).ready(function(){
            $('#ls-button-submit').hide();
            setTimeout(function () {
               $('#ls-button-submit').trigger('click').show();
          }, 30000);  // Proceed after 30 seconds
    });
</script>

<p>Please click to be redirected to the choice tasks.</p>
<button>Go to choice tasks</button><script>
$(document).ready(function() {
      var idnum=1234;
      // var idnum="{TOKEN:TOKEN}";
      var url="https://mystudy.com/cgi-bin/ciwweb.pl?studyname=mystudy&amp;amp;panelid="+idnum;
 
      $('#ls-button-submit').hide();
 
      $('button').click(function () {
            $('#ls-button-submit').trigger('click').show()
            $(location).attr("href", url);
            return false;
            });
 
      });
</script>

<a class="btn btn-primary btn-lg active" href="http://www.server.de?panelid={SAVEDID}" role="button" target="_blank">Please, click to enter the experiment</a>        
 
<script type="text/javascript" charset="utf-8">
      $(document).ready(function(){
            $('#ls-button-submit').hide();
            setTimeout(function () {
               $('#ls-button-submit').trigger('click').show();
          }, 30000);  // Proceed after 30 seconds
    });
</script>

<?php
 
  require_once 'jsonRPCClient.php';
 
  define( 'LS_BASEURL', 'http://localhost/limeSurvey3x');  
  define( 'LS_USER', 'admin' );
  define( 'LS_PASSWORD', 'password' );
 
  $iSurveyID = $_GET['sid'];
  $sToken = $_GET['token'];
 
  if(ctype_alnum($iSurveyID) &amp;&amp; (strlen($iSurveyID) == 5 || strlen($iSurveyID) == 6)) { // Valid SID format
 
    // Instantiate a new RPC client
    $myJSONRPCClient = new jsonRPCClient( LS_BASEURL.'/index.php/admin/remotecontrol' );
 
    // Get a session key
    $sSessionKey= $myJSONRPCClient->get_session_key( LS_USER, LS_PASSWORD );
 
    if(is_array($sSessionKey)) { // Invalid session
      echo $sSessionKey['status'];
    }
    else if($sSessionKey) { // Valid session
 
      // Get a response by token to determine the response ID and lastpage values
      $aFields = array('id', 'lastpage');
      $tokenResponse = $myJSONRPCClient->export_responses_by_token($sSessionKey, $iSurveyID, 'json', $sToken, null, 'all', 'code', 'short', $aFields);
 
      if(is_array($tokenResponse)) {
        // Oops, a response error...
 
        // Print any errors
        print_r($tokenResponse);
 
        // Release the session key
        $myJSONRPCClient->release_session_key( $sSessionKey );
      }
      // 
      else {
        // There is a valid response...
 
        // Decode the returned base-64 string and convert to an array
        $decodedString = base64_decode($tokenResponse);
        $tokenResponseArr = json_decode($decodedString, True);
        // Get the first item in the $tokenResponseArr['responses'][0] array
        $tokenResponseArr2 = reset($tokenResponseArr['responses'][0]);
 
        // Define vars for the response ID and lastpage values
        $responseID = $tokenResponseArr2['id'];
        $responseLastpage = $tokenResponseArr2['lastpage'];
 
        // Increment the lastpage
        // ...or, you could hard-code a lastpage value here instead
        $responseLastpage++;
 
        // Update the response lastpage value
        $aResponseData = array(
          'id' => $responseID,
          'lastpage' => $responseLastpage
        );
        $updatedResponse = $myJSONRPCClient->update_response($sSessionKey, $iSurveyID, $aResponseData);
 
        // Release the session key
        $myJSONRPCClient->release_session_key( $sSessionKey );
 
        // Redirect to the next site
        header("Location: https://google.com");
        die();
      }
    }
  }
  else { // Invalid SID format
    die( 'Invalid format!' );
  }
 
?>