noahbuscher/macaw组建的一个疑问，求解答

Question

今天看一个路由包的源码，觉得这步判断有点多余，希望大家可以帮助理解下这块的源码。

项目地址:https://github.com/noahbusche...

这个包很小，下面是主要代码部分，不理解为何有了(in_array($uri, self::$routes))这个if判断，还需要下面的(preg_match('#^' . $route . '$#', $uri, $matched))正则判断，这俩判断从结果上有什么不同么

if (in_array($uri, self::$routes)) {
    $route_pos = array_keys(self::$routes, $uri);
    foreach ($route_pos as $route) {

        // Using an ANY option to match both GET and POST requests
        if (self::$methods[$route] == $method || self::$methods[$route] == 'ANY' || in_array($method, self::$maps[$route])) {
            $found_route = true;
            ...
        }
    }
} else {
    // Check if defined with regex
    $pos = 0;
    foreach (self::$routes as $route) {
        if (strpos($route, ':') !== false) {
            $route = str_replace($searches, $replaces, $route);
        }

        if (preg_match('#^' . $route . '$#', $uri, $matched)) {
            if (self::$methods[$pos] == $method || self::$methods[$pos] == 'ANY' || (!empty(self::$maps[$pos]) && in_array($method, self::$maps[$pos]))) {
                $found_route = true;
                 ...
            }
        }
    }
}