|string If an array of values is passed as the argument, then the returned result will also be an array * with the same dimensions */ public static function lower(mixed $mixedCaseValue): array|string { if (is_array($mixedCaseValue)) { return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $mixedCaseValue); } try { $mixedCaseValue = Helpers::extractString($mixedCaseValue, true); } catch (CalcExp $e) { return $e->getMessage(); } return StringHelper::strToLower($mixedCaseValue); } /** * UPPERCASE. * * Converts a string value to upper case. * * @param mixed $mixedCaseValue The string value to convert to upper case * Or can be an array of values * * @return array|string If an array of values is passed as the argument, then the returned result will also be an array * with the same dimensions */ public static function upper(mixed $mixedCaseValue): array|string { if (is_array($mixedCaseValue)) { return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $mixedCaseValue); } try { $mixedCaseValue = Helpers::extractString($mixedCaseValue, true); } catch (CalcExp $e) { return $e->getMessage(); } return StringHelper::strToUpper($mixedCaseValue); } /** * PROPERCASE. * * Converts a string value to proper or title case. * * @param mixed $mixedCaseValue The string value to convert to title case * Or can be an array of values * * @return array|string If an array of values is passed as the argument, then the returned result will also be an array * with the same dimensions */ public static function proper(mixed $mixedCaseValue): array|string { if (is_array($mixedCaseValue)) { return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $mixedCaseValue); } try { $mixedCaseValue = Helpers::extractString($mixedCaseValue, true); } catch (CalcExp $e) { return $e->getMessage(); } return StringHelper::strToTitle($mixedCaseValue); } }