<?php
 
  require_once 'jsonRPCClient.php';
 
  define( 'LS_BASEURL', 'https://pathTo/limeSurvey');  
  define( 'LS_USER', 'admin' );
  define( 'LS_PASSWORD', '*******' );
 
  $iSurveyID = 885886;
  $sToken = '111';
 
 
  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
      $tokenResponse = $myJSONRPCClient->export_responses_by_token($sSessionKey, $iSurveyID, 'json', $sToken, null, 'all', 'code', 'long');
 
      if(is_array($tokenResponse)) {
        // Oops, print any errors
        print_r($tokenResponse);
      }
      else {
        // There is a valid response...
        // Decode the retuned 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]);
        $responseID = $tokenResponseArr2['id'];
        echo $responseID;
        echo '<br /><br />';
 
        // Update a response
        // In this case, we update a multiple-choice sub-question 
        // and it's related comment with null values. 
        // The group ID is 330, the question ID is 5152, the sq-code is SQ001
        $aResponseData = array(
          'id' => $responseID,
          $iSurveyID.'X330X5152SQ001' => '',
          $iSurveyID.'X330X5152SQ001comment' => ''
        );
        $updatedResponse = $myJSONRPCClient->update_response($sSessionKey, $iSurveyID, $aResponseData);
 
        echo $updatedResponse;
      }
    }
 
    // Release the session key
    $myJSONRPCClient->release_session_key( $sSessionKey );
  }
  else { // Invalid SID format
    die( 'Invalid format!' );
  }
 
?>