CS_REST_BaseSerialiser::check_encoding PHP Метод

        function check_encoding($data)
        {
            foreach ($data as $k => $v) {
                // If the element is a sub-array then recusively encode the array
                if (is_array($v)) {
                    $data[$k] = $this->check_encoding($v);
                    // Otherwise if the element is a string then we need to check the encoding
                } else {
                    if (is_string($v)) {
                        if (function_exists('mb_detect_encoding') && mb_detect_encoding($v) !== 'UTF-8' || function_exists('mb_check_encoding') && !mb_check_encoding($v, 'UTF-8')) {
                            // The string is using some other encoding, make sure we utf-8 encode
                            $v = utf8_encode($v);
                        }
                        $data[$k] = $v;
                    }
                }
            }
            return $data;
        }