replace session with cookie

setcookie("kt_source", substr($val,0,255), time() + 3153600, '/', '.kemptechnologies.com');
 setcookie("kt_utm",rtrim($utm_data, '| '), time() + 3153600, '/', '.kemptechnologies.com');

 function kt_webform_cookie_get($key){
  return isset($_COOKIE) && isset($_COOKIE[$key]) ? $_COOKIE[$key] : false;
}
replace all kt_webform_session_get with kt_webform_cookie_get

function kt_webform_cookie_set($key, $value, $time = 0, $dir = '/', $host = '.kemptechnologies.com'){
  $time = ($time == 0) ? time() + 3153600 : $time;
  setcookie($key, $value, $time, $dir, $host);
}

replace all kt_webform_session_set with kt_webform_cookie_set