CI框架， 参数验证

 /**
     * 统一API参数检验方法
     *
     * 调用示例 check_param(array('money' => array('required', 'integer', 'greater_than_equal_to[1]', 'less_than_equal_to[200]')));
     *
     * @access public
     * @param array $arr
     * @since 1.0
     * @return  boolean
     */
    public function check_param($arr, $data = array(), $method = 'get')
    {
        /**
         * 设置要验证的请求数据
         */
        if (!empty($arr)) {
            $key_arr = array();
            $rule_arr = array();
            foreach ($arr as $key => $value) {
                $temp_arr = explode(",", $key);
                if (!is_array($value)) {
                    $value = explode("|", $value);
                }
                $key_arr = array_merge($key_arr, $temp_arr);
                if (!empty($temp_arr)) {
                    foreach ($temp_arr as $temp_value) {
                        if (!empty($rule_arr[$temp_value])) {
                            $rule_arr[$temp_value] = array_merge($rule_arr[$temp_value], $value);
                        } else {
                            $rule_arr[$temp_value] = $value;
                        }
                    }
                }
            }
            $key_arr = array_unique($key_arr);
            if (!empty($rule_arr)) {
                foreach ($rule_arr as $rule_key => $rule_value) {
                    $rule_arr[$rule_key] = array_unique($rule_value);
                }
            }
        }
        if ($method === 'post' || $method === 'POST') {
            $request_data = $this->input->post($key_arr, TRUE);
        } else {
            $request_data = $this->input->get($key_arr, TRUE);
        }

        if ('get_post' == $method) {
            $request_data = [];
            foreach ($key_arr as $one_key) {
                $request_data[$one_key] = $this->input->get_post($one_key, TRUE);
            }
        }

        $raw_input_stream = $this->input->raw_input_stream;
//        $raw_input_stream = stripslashes($raw_input_stream);

        $input_stream = json_decode($raw_input_stream, TRUE);
        if (json_last_error() === JSON_ERROR_NONE) {
            foreach ($key_arr as $one_key) {
                if (NULL === $request_data[$one_key] and isset($input_stream[$one_key])) {
                    $request_data[$one_key] = $input_stream[$one_key];
                }
            }
        }
        $this->form_validation->set_data($request_data);
        /**
         * 设置验证规则
         */
        if (!empty($rule_arr)) {
            $lang = $this->lang->line('txt_base_validation');
            foreach ($rule_arr as $rule_key => $rule_value) {
               $ts =  $this->form_validation->set_rules($rule_key, '', $rule_value, array('required' => $lang[0]
                    , 'integer' => $lang[1]
                    , 'regex_match' => $lang[2]
                    , 'greater_than' => $lang[3]
                    , 'max_length' => $lang[4]
                    , 'min_length' => $lang[5]
                ));
            }
        }
        /**
         * 开始验证
         */
        if (!$this->form_validation->run()) {
            //验证失败处理逻辑            
            $errmsg = validation_errors(' ', ' ');
            if (!empty($arr) && !empty($data)) {
                foreach ($arr as $arr_key => $arr_value) {
                    $errmsg = str_replace($arr_key, $data[$arr_key], $errmsg);
                }
            }
            $this->returnError($errmsg . $this->lang->line('txt_base_error_msg'), '400');
            return FALSE;
        }
        return $request_data;
    }