src/Server.php
static function app(string $app) : self {
        if (!isset(self::$_apps[$app]))
            Console::fatal("Failed to fetch app. App \"$app\" not exist!");
        return self::$_apps[$app];
    }
static function app(string $app) : self {
        if (!isset(self::$_apps[$app]))
            Console::fatal("Failed to fetch app. App \"$app\" not exist!");
        return self::$_apps[$app];
    }
static function app ( string $ app ) : self { if ( ! isset ( self :: $ _apps [ $ app ] ) ) Console :: fatal ( "Failed to fetch app. App \"$app\" not exist!" ) ; return self :: $ _apps [ $ app ] ; }
选择服务

@param string $app
@return Server
选择服务