refering to the very top of the filesystem

my executed file is in

/homez.x/user/www/file.php

I need a f开发者_如何转开发unction to only get

/homez.x/user/

fair enough I can build a function stripping $_SERVER['document_root'] without the last folder, but need to know if is there only one method to achieve this

I'd merely do this:

$path = '/home/' . trim(`whoami`);

See also: shell_exec()

/homez.x/user/ isn't the root of the filesystem -- / is. Are you looking for the home directory, or just the parent of the document root? (They may not be the same at all.)

The former can be determined using posix_getpwuid(). The latter is simply dirname($_SERVER["DOCUMENT_ROOT"]).

By hardcoding a directory structure you lessen the reusability of your code.

So what I would recommend is to add this directory-level to your include_path somewhere central - php.ini or by using set_include_path.

fopen, file & Co will look for the file in the "included paths" if you provide them with the propper flags.