How do I detect the directory a php file is in

I have a PHP file that I need it to detect it's directory it's in. In my case I want it to return C:\Program Files\Apache Software Foundation\开发者_StackOverflow中文版Apache2.2\htdocs\

I think that this is pretty straightforward but if there is something you don't understand just comment

In PHP 5.3: __DIR__

In lower version: dirname(__FILE__)

The magic-constant __FILE__ contains the full path to the file in which you write it.

The dirname function returns the path to the directory corresponding to a file.

So, in your case, to get the path to the directory containing your file, you can use :

echo dirname(__FILE__);

In addition to the directory the file is in, you may find the directory that corresponds to the web server's / URI (http://www.example.com/ URL) useful. That's stored in $_SERVER['DOCUMENT_ROOT']