<?php
 
  require_once 'jsonRPCClient.php';
 
  define( 'LS_BASEURL', 'https://pathTo/limeSurvey/');  
  define( 'LS_USER', 'username' );
  define( 'LS_PASSWORD', 'password' );
 
  $iSurveyID = 11111; 
 
  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      
 
      // Expire survey
      $aSurveyData = array('expires'=>'2018-01-27 00:00:00');
      $newSurveyProperties = $myJSONRPCClient->set_survey_properties($sSessionKey, $iSurveyID, $aSurveyData);
    }
 
    // Release the session key
    $myJSONRPCClient->release_session_key( $sSessionKey );
  }
  else { // Invalid SID format
    die( 'Invalid format!' );
  }
 
?>