public static function changeCase($string, $case)
{
if (!function_exists('mb_strtolower') || !function_exists('mb_strtoupper')) {
return $string;
}
if (is_array($string)) {
array_walk($string, function (&$value, $key, $case) {
$value = WFUtility::changeCase($value, $case);
}, $case);
} else {
switch ($case) {
case 'lowercase':
$string = mb_strtolower($string);
break;
case 'uppercase':
$string = mb_strtoupper($string);
break;
}
}
return $string;
}
