/**
 * The first element contains multibyte Digit Characters.
 *   But , Zend_Filter_Digits is expected to return only singlebyte digits.
 *
 * The second contains multibyte or singebyte space, and also alphabet.
 * The third  contains various multibyte characters.
 * The last contains only singlebyte digits.
 */

        $valuesExpected = array(
            '1９2八3四８'     => '123',
            'Ｃ 4.5B　6'      => '456',
            '9壱8＠7．6，5＃4' => '987654'
            '789'              => '789',
            );