think\Url::build PHP Method

    public static function build($url = '', $vars = '', $suffix = true, $domain = false)
    {
        if (false === $domain && Config::get('url_domain_deploy')) {
            $domain = true;
        }
        // 解析URL
        if (0 === strpos($url, '[') && ($pos = strpos($url, ']'))) {
            // [name] 表示使用路由命名标识生成URL
            $name = substr($url, 1, $pos - 1);
            $url = 'name' . substr($url, $pos + 1);
        }
        $info = parse_url($url);
        $url = !empty($info['path']) ? $info['path'] : '';
        if (isset($info['fragment'])) {
            // 解析锚点
            $anchor = $info['fragment'];
            if (false !== strpos($anchor, '?')) {
                // 解析参数
                list($anchor, $info['query']) = explode('?', $anchor, 2);
            }
            if (false !== strpos($anchor, '@')) {
                // 解析域名
                list($anchor, $domain) = explode('@', $anchor, 2);
            }
        } elseif (strpos($url, '@')) {
            // 解析域名
            list($url, $domain) = explode('@', $url, 2);
        }
        // 解析参数
        if (is_string($vars)) {
            // aaa=1&bbb=2 转换成数组
            parse_str($vars, $vars);
        }
        if ($url) {
            $rule = Route::name(isset($name) ? $name : $url . (isset($info['query']) ? '?' . $info['query'] : ''));
            if (is_null($rule) && isset($info['query'])) {
                $rule = Route::name($url);
                // 解析地址里面参数 合并到vars
                parse_str($info['query'], $params);
                $vars = array_merge($params, $vars);
                unset($info['query']);
            }
        }
        if (!empty($rule) && ($match = self::getRuleUrl($rule, $vars))) {
            // 匹配路由命名标识
            $url = $match[0];
            // 替换可选分隔符
            $url = preg_replace(['/\\((\\W)\\?\\)$/', '/\\((\\W)\\?\\)/'], ['', '\\1'], $url);
            if (!empty($match[1])) {
                $domain = $match[1];
            }
        } elseif (!empty($rule) && isset($name)) {
            throw new \InvalidArgumentException('route name not exists:' . $name);
        } else {
            // 检查别名路由
            $alias = Route::rules('alias');
            if ($alias) {
                // 别名路由解析
                foreach ($alias as $key => $val) {
                    if (is_array($val)) {
                        $val = $val[0];
                    }
                    if (0 === strpos($url, $val)) {
                        $url = $key . substr($url, strlen($val));
                        break;
                    }
                }
            } else {
                // 路由标识不存在 直接解析
                $url = self::parseUrl($url, $domain);
            }
            if (isset($info['query'])) {
                // 解析地址里面参数 合并到vars
                parse_str($info['query'], $params);
                $vars = array_merge($params, $vars);
            }
        }
        // 检测URL绑定
        $type = Route::getBind('type');
        if ($type) {
            $bind = Route::getBind($type);
            if (0 === strpos($url, $bind)) {
                $url = substr($url, strlen($bind) + 1);
            }
        }
        // 还原URL分隔符
        $depr = Config::get('pathinfo_depr');
        $url = str_replace('/', $depr, $url);
        // URL后缀
        $suffix = in_array($url, ['/', '']) ? '' : self::parseSuffix($suffix);
        // 锚点
        $anchor = !empty($anchor) ? '#' . $anchor : '';
        // 参数组装
        if (!empty($vars)) {
            // 添加参数
            if (Config::get('url_common_param')) {
                $vars = urldecode(http_build_query($vars));
                $url .= $suffix . '?' . $vars . $anchor;
            } else {
                foreach ($vars as $var => $val) {
                    if ('' !== trim($val)) {
                        $url .= $depr . $var . $depr . urlencode($val);
                    }
                }
                $url .= $suffix . $anchor;
            }
        } else {
            $url .= $suffix . $anchor;
        }
        // 检测域名
        $domain = self::parseDomain($url, $domain);
        // URL组装
        $url = $domain . (self::$root ?: Request::instance()->root()) . '/' . ltrim($url, '/');
        return $url;
    }

 /**
  * 操作错误跳转的快捷方法
  * @access protected
  * @param mixed $msg 提示信息
  * @param string $url 跳转的URL地址
  * @param mixed $data 返回的数据
  * @param integer $wait 跳转等待时间
  * @return void
  */
 protected function error($msg = '', $url = null, $data = '', $wait = 3)
 {
     $code = 0;
     if (is_numeric($msg)) {
         $code = $msg;
         $msg = '';
     }
     if (is_null($url)) {
         $url = 'javascript:history.back(-1);';
     } else {
         $url = preg_match('/^(https?:|\\/)/', $url) ? $url : Url::build($url);
     }
     $result = ['code' => $code, 'msg' => $msg, 'data' => $data, 'url' => $url, 'wait' => $wait];
     $type = $this->getResponseType();
     if ('html' == strtolower($type)) {
         $result = ViewTemplate::instance(Config::get('template'), Config::get('view_replace_str'))->fetch(Config::get('dispatch_error_tmpl'), $result);
     }
     $response = Response::create($result, $type);
     throw new HttpResponseException($response);
 }