Class yii\web\UrlManager

                public function addRules($rules, $append = true)
{
    if (!$this->enablePrettyUrl) {
        return;
    }
    $rules = $this->buildRules($rules);
    if ($append) {
        $this->rules = array_merge($this->rules, $rules);
    } else {
        $this->rules = array_merge($rules, $this->rules);
    }
}

            

                protected function buildRules($ruleDeclarations)
{
    $builtRules = $this->getBuiltRulesFromCache($ruleDeclarations);
    if ($builtRules !== false) {
        return $builtRules;
    }
    $builtRules = [];
    $verbs = 'GET|HEAD|POST|PUT|PATCH|DELETE|OPTIONS';
    foreach ($ruleDeclarations as $key => $rule) {
        if (is_string($rule)) {
            $rule = ['route' => $rule];
            if (preg_match("/^((?:($verbs),)*($verbs))\\s+(.*)$/", $key, $matches)) {
                $rule['verb'] = explode(',', $matches[1]);
                $key = $matches[4];
            }
            $rule['pattern'] = $key;
        }
        if (is_array($rule)) {
            $rule = Yii::createObject(array_merge($this->ruleConfig, $rule));
        }
        if (!$rule instanceof UrlRuleInterface) {
            throw new InvalidConfigException('URL rule class must implement UrlRuleInterface.');
        }
        $builtRules[] = $rule;
    }
    $this->setBuiltRulesCache($ruleDeclarations, $builtRules);
    return $builtRules;
}

            

                protected function canBeCached(UrlRuleInterface $rule)
{
    return
        // if rule does not provide info about create status, we cache it every time to prevent bugs like #13350
        // @see https://github.com/yiisoft/yii2/pull/13350#discussion_r114873476
        !method_exists($rule, 'getCreateUrlStatus') || ($status = $rule->getCreateUrlStatus()) === null
        || $status === UrlRule::CREATE_STATUS_SUCCESS
        || $status & UrlRule::CREATE_STATUS_PARAMS_MISMATCH;
}

            

                public function createAbsoluteUrl($params, $scheme = null)
{
    $params = (array) $params;
    $url = $this->createUrl($params);
    if (strpos($url, '://') === false) {
        $hostInfo = $this->getHostInfo();
        if (strncmp($url, '//', 2) === 0) {
            $url = substr($hostInfo, 0, strpos($hostInfo, '://')) . ':' . $url;
        } else {
            $url = $hostInfo . $url;
        }
    }
    return Url::ensureScheme($url, $scheme);
}

            

                public function createUrl($params)
{
    $params = (array) $params;
    $anchor = isset($params['#']) ? '#' . $params['#'] : '';
    unset($params['#'], $params[$this->routeParam]);
    $route = trim(isset($params[0]) ? $params[0] : '', '/');
    unset($params[0]);
    $baseUrl = $this->showScriptName || !$this->enablePrettyUrl ? $this->getScriptUrl() : $this->getBaseUrl();
    if ($this->enablePrettyUrl) {
        $cacheKey = $route . '?';
        foreach ($params as $key => $value) {
            if ($value !== null) {
                $cacheKey .= $key . '&';
            }
        }
        $url = $this->getUrlFromCache($cacheKey, $route, $params);
        if ($url === false) {
            /* @var $rule UrlRule */
            foreach ($this->rules as $rule) {
                if (in_array($rule, $this->_ruleCache[$cacheKey], true)) {
                    // avoid redundant calls of `UrlRule::createUrl()` for rules checked in `getUrlFromCache()`
                    // @see https://github.com/yiisoft/yii2/issues/14094
                    continue;
                }
                $url = $rule->createUrl($this, $route, $params);
                if ($this->canBeCached($rule)) {
                    $this->setRuleToCache($cacheKey, $rule);
                }
                if ($url !== false) {
                    break;
                }
            }
        }
        if ($url !== false) {
            if (strpos($url, '://') !== false) {
                if ($baseUrl !== '' && ($pos = strpos($url, '/', 8)) !== false) {
                    return substr($url, 0, $pos) . $baseUrl . substr($url, $pos) . $anchor;
                }
                return $url . $baseUrl . $anchor;
            } elseif (strncmp($url, '//', 2) === 0) {
                if ($baseUrl !== '' && ($pos = strpos($url, '/', 2)) !== false) {
                    return substr($url, 0, $pos) . $baseUrl . substr($url, $pos) . $anchor;
                }
                return $url . $baseUrl . $anchor;
            }
            $url = ltrim($url, '/');
            return "$baseUrl/{$url}{$anchor}";
        }
        if ($this->suffix !== null) {
            $route .= $this->suffix;
        }
        if (!empty($params) && ($query = http_build_query($params)) !== '') {
            $route .= '?' . $query;
        }
        $route = ltrim($route, '/');
        return "$baseUrl/{$route}{$anchor}";
    }
    $url = "$baseUrl?{$this->routeParam}=" . urlencode($route);
    if (!empty($params) && ($query = http_build_query($params)) !== '') {
        $url .= '&' . $query;
    }
    return $url . $anchor;
}

            

                public function getBaseUrl()
{
    if ($this->_baseUrl === null) {
        $request = Yii::$app->getRequest();
        if ($request instanceof Request) {
            $this->_baseUrl = $request->getBaseUrl();
        } else {
            throw new InvalidConfigException('Please configure UrlManager::baseUrl correctly as you are running a console application.');
        }
    }
    return $this->_baseUrl;
}

            

                protected function getBuiltRulesFromCache($ruleDeclarations)
{
    $cache = $this->ensureCache();
    if (!$cache) {
        return false;
    }
    return $cache->get([$this->cacheKey, $this->ruleConfig, $ruleDeclarations]);
}

            

                public function getHostInfo()
{
    if ($this->_hostInfo === null) {
        $request = Yii::$app->getRequest();
        if ($request instanceof \yii\web\Request) {
            $this->_hostInfo = $request->getHostInfo();
        } else {
            throw new InvalidConfigException('Please configure UrlManager::hostInfo correctly as you are running a console application.');
        }
    }
    return $this->_hostInfo;
}

            

                public function getScriptUrl()
{
    if ($this->_scriptUrl === null) {
        $request = Yii::$app->getRequest();
        if ($request instanceof Request) {
            $this->_scriptUrl = $request->getScriptUrl();
        } else {
            throw new InvalidConfigException('Please configure UrlManager::scriptUrl correctly as you are running a console application.');
        }
    }
    return $this->_scriptUrl;
}

            

                protected function getUrlFromCache($cacheKey, $route, $params)
{
    if (!empty($this->_ruleCache[$cacheKey])) {
        foreach ($this->_ruleCache[$cacheKey] as $rule) {
            /* @var $rule UrlRule */
            if (($url = $rule->createUrl($this, $route, $params)) !== false) {
                return $url;
            }
        }
    } else {
        $this->_ruleCache[$cacheKey] = [];
    }
    return false;
}

            

                public function init()
{
    parent::init();
    if ($this->normalizer !== false) {
        $this->normalizer = Yii::createObject($this->normalizer);
        if (!$this->normalizer instanceof UrlNormalizer) {
            throw new InvalidConfigException('`' . get_class($this) . '::normalizer` should be an instance of `' . UrlNormalizer::className() . '` or its DI compatible configuration.');
        }
    }
    if (!$this->enablePrettyUrl) {
        return;
    }
    if (!empty($this->rules)) {
        $this->rules = $this->buildRules($this->rules);
    }
}

            

                public function parseRequest($request)
{
    if ($this->enablePrettyUrl) {
        /* @var $rule UrlRule */
        foreach ($this->rules as $rule) {
            $result = $rule->parseRequest($this, $request);
            if (YII_DEBUG) {
                Yii::debug([
                    'rule' => method_exists($rule, '__toString') ? $rule->__toString() : get_class($rule),
                    'match' => $result !== false,
                    'parent' => null,
                ], __METHOD__);
            }
            if ($result !== false) {
                return $result;
            }
        }
        if ($this->enableStrictParsing) {
            return false;
        }
        Yii::debug('No matching URL rules. Using default URL parsing logic.', __METHOD__);
        $suffix = (string) $this->suffix;
        $pathInfo = $request->getPathInfo();
        $normalized = false;
        if ($this->normalizer !== false) {
            $pathInfo = $this->normalizer->normalizePathInfo($pathInfo, $suffix, $normalized);
        }
        if ($suffix !== '' && $pathInfo !== '') {
            $n = strlen($this->suffix);
            if (substr_compare($pathInfo, $this->suffix, -$n, $n) === 0) {
                $pathInfo = substr($pathInfo, 0, -$n);
                if ($pathInfo === '') {
                    // suffix alone is not allowed
                    return false;
                }
            } else {
                // suffix doesn't match
                return false;
            }
        }
        if ($normalized) {
            // pathInfo was changed by normalizer - we need also normalize route
            return $this->normalizer->normalizeRoute([$pathInfo, []]);
        }
        return [$pathInfo, []];
    }
    Yii::debug('Pretty URL not enabled. Using default URL parsing logic.', __METHOD__);
    $route = $request->getQueryParam($this->routeParam, '');
    if (is_array($route)) {
        $route = '';
    }
    return [(string) $route, []];
}

            

                public function setBaseUrl($value)
{
    $this->_baseUrl = $value === null ? null : rtrim(Yii::getAlias($value), '/');
}

            

                protected function setBuiltRulesCache($ruleDeclarations, $builtRules)
{
    $cache = $this->ensureCache();
    if (!$cache) {
        return false;
    }
    return $cache->set([$this->cacheKey, $this->ruleConfig, $ruleDeclarations], $builtRules);
}

            

                public function setHostInfo($value)
{
    $this->_hostInfo = $value === null ? null : rtrim($value, '/');
}

            

                protected function setRuleToCache($cacheKey, UrlRuleInterface $rule)
{
    $this->_ruleCache[$cacheKey][] = $rule;
}

            

                public function setScriptUrl($value)
{
    $this->_scriptUrl = $value;
}