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I have some PHP background so this is not a "code for me" post. I just could not find documentation on functions.php (the one that is in each theme folder). Can anyone explain to me or point to the documentation?

I'm looking to make a little random picture script, which shows a random picture from the integrated Gallery system everytime a page loads. Thanks in advance.

The functions.php is there for any theme-related PHP code that you may need. You can actually use PHP in the theme's header.thtml, so if you need to write a function, you can put it into the functions.php and call it from header.thtml.

A random picture script would probably be independent of the theme. A better place for such a piece of code would be lib-custom.php (in the systems directory).

bye, Dirk

So if my function name is picture() all I need to put in the template file is {picture} ?

Err, no, if your function's name is "picture", then of course you call it as picture(). Or, rather,
bye, Dirk

Is there a particular template that your looking to use {picture} in?

Any variable in {braces} is parsed by the template class and replaced by the template->set_var method. So just adding {variable} will only work if the code using that template is also setting that variable.

functions.php is often used to control the template that is being used - where you may set the name of the template to be used for a particular block as in

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