protected static function convertContains($string, $caseSensetive = false)
{
if ($caseSensetive) {
return sprintf('text() = "%s"', $string);
}
if (function_exists('mb_strtolower')) {
return sprintf('php:functionString("mb_strtolower", .) = php:functionString("mb_strtolower", "%s")', $string);
} else {
return sprintf('php:functionString("strtolower", .) = php:functionString("strtolower", "%s")', $string);
}
}