Re: include_once() isnt!

"Rob" <midnightstudent@shaw.ca> wrote in message news:20040203220433.95299.qmail@pb1.pair.com... > Ive programmed with C/C++ for years and have recently started to dabble in > PHP. Ive written a multi-part script for a friend and Ive run into a > problem. > > Ive got 14 include files 3 of which are basic components that may or may not > be used by other components. One is an authorisation class, another is a > Dbase clas (For MySQL) and another is a file system component. > > Now heres the problem. My authorisation component uses the DBase component. > Some of my other components use the DBase component only some of the time > and the Auth and DBase components some of the time and the Auth component > some of the time. SO... In the Auth component ive included (via > include_once()) the DB component, because it needs it. NOW... in other > modules Ive included (via include_once()) the auth, DB, and gallery > components. > Heres where the problem lies. Each component is in a separate file, and when > I run the script, I get an arror saying I cant re-define the classes. > Which makes me believe that the include_once() function is trying to include > the other components even though they are already included. So, does that > mean that include_once() only works right when it is used in the same file? > It wont recognise that an include was already included in another include? > Have I confused you yet? I am. There may be a problem with include_once, something about where it's placed and so on... But anyway I would advise you to not generally rely on include_once() or require_once(). These are just meant to protect you from making an error, but you should check to see that you don't use include_once() on the same file many times. It's bad practice to include one file several times. One tip i would give you, is to set up one file, something like "define_classes.inc.php", which is responsable for including the classes and defining them. In this way you can just include define_classes.inc.php in the scripts where you need classes, and your work will be a lot more structured. I personally use this system on my web-site, and it does that i don't have to be worried about if I am getting the correct classes, because I get them all through define_classes.inc.php Eric