条件配置：如何检测我是本地还是在线？

Question

I want to provide different configurations for local and offline. At the moment, every time I upload my stuff to the web server, I must make sure that I don't mess up with the different config files. One for local development, and one for online.

I slightly remember a couple of years ago, a code snippet distinguished somehow automatically between online and local development.

Is there a safe way to detect that?

Answer 1

I generally use the server name, for that ; for example, here's what I use on my blog :

if ($_SERVER['SERVER_NAME'] === 'blog') {
    // Development
} else {
    // Production
}

This is because :

• On my development machine, the blog is accessed via http://blog (nothing else after), using a VirtualHost with a ServerName directive.
• On the production server, of course, the ServerName directive is a bit longer than this, containing the actual blog server name.