mb_convert_case add compatibility with the same PHP function, when mode = MB_CASE_TITLE 'hello   world' -> 'Hello   World'
mb_convert_case add compatibility with the same PHP function, when mode = MB_CASE_TITLE
'hello   world' -> 'Hello   World'

cetver/yii2-validation-filters,cetver/yii2-validation-filters,cetver/yii2-validation-filters