require_once(), seemingly including files more then once.

[Sean Quinn]

Hi,

I don't know if anyone has run into similar problems, but it seems like
when I use `require_once(. ..)' with files that contain functions I get
an error indicating that it can't redeclare the functions. I thought
the point of the once directive was to PREVENT the system from
including duplicate files (and thus attempting to redeclare the
functions).

It has worked elsewhere, for instance I have a database.php file, that
just wraps the mysql database query functions into my own functions. I
have used it in the following manner in two files one that calls
another:
require_once "./directory/database.php";

And it works fine, it doesn't give me any errors about redeclaring
functions.

Now when I do the following in one file:
require_once "./directory/database.php";

and the following in the file the first calls
require_once $DOCUMENT_ROOT . "/directory/database.php";

I get the redeclare error. Is this because the system is perceiving
these as two seperate files? Syntax wise the above two work exactly
the same as if I had parantheses (I thought this might be the cause of
the error) but it wasn't. Any help/insight on this would be greatly
appreciated.

[Alvaro G Vicario]

Re: require_once(), seemingly including files more then once.

*** Sean Quinn wrote/escribió (10 Aug 2005 13:26:02 -0700):[color=blue]
> I get the redeclare error. Is this because the system is perceiving
> these as two seperate files?[/color]

Try using absolute paths. $_SERVER['DOCUMENT_ROOT'] may help.

--
-- Álvaro G. Vicario - Burgos, Spain
-- http://bits.demogracia.com - Mi sitio sobre programación web
-- Don't e-mail me your questions, post them to the group
--

[Michael Phipps]

Re: require_once(), seemingly including files more then once.

> Now when I do the following in one file:[color=blue]
> require_once "./directory/database.php";
>
> and the following in the file the first calls
> require_once $DOCUMENT_ROOT . "/directory/database.php";
>
> I get the redeclare error. Is this because the system is perceiving
> these as two seperate files? Syntax wise the above two work exactly
> the same as if I had parantheses (I thought this might be the cause of
> the error) but it wasn't. Any help/insight on this would be greatly
> appreciated.[/color]

why don't you try the "document root" syntax in both files to test your
theory?

oh and just a pointer, use $_SERVER['DOCUMENT_ROOT'] because if register
globals gets switched off you're going to be grumpy.

[Sean Quinn]

Re: require_once(), seemingly including files more then once.

Thanks for the advice. I actually decided to test it before I received
any replies, and just forgot to post it.

It seems that if you use two different file designations (i.e. just
"./directory/filepath.ext", and $_SERVER['DOCUMENT_ROOT'] .
"/directory/fielpath.ext" the system will include both files regardless
if they are the same file. So I guess it looks like its time to start
using $_SERVER['DOCUMENT_ROOT'] more religiously now in my scripts.
heh.

Thanks again for the input, and advice though!