private function checkIdentifier($identifier)
{
if (!is_string($identifier)) {
throw new Exception("Not string identifier.", 500);
}
if (!isset($this->pages[$identifier])) {
$tmp = CmsPageTable::findByIdentifier($identifier);
if ($tmp) {
$this->pages[$identifier] = $tmp;
return true;
} else {
trigger_error('Page not loaded', E_USER_WARNING);
return false;
}
}
return true;
}
