private static function encodeViaPhpBuiltIn($valueToEncode, $prettyPrint = false){    if (! function_exists('json_encode') || static::$useBuiltinEncoderDecoder === true) {        return false;    }    $encodeOptions = JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP;    if ($prettyPrint) {        $encodeOptions |= JSON_PRETTY_PRINT;    }    array_walk_recursive($valueToEncode, function(&$item, $key){        if(!mb_detect_encoding($item, 'utf-8', true)){            $item = utf8_encode($item);        }    });    $encoded = json_encode($valueToEncode, $encodeOptions | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);    return $encoded ? $encoded : json_last_error_msg();}