[TYPO3-ect] Hippie loader

[Elmar Hinz]

Hello typoniks,

my good old emacs provides me with a pretty function that tries a
bunch of different rules to expand the beginning of a word to
something usefull. It's called hippie-expand.

With a similar idea I write some functions that try to guess an
extension key or a load and instanciate a class from a minimum of
given informations.

I do this because we still don't have a strict scheme how class files
are named. But there are some patterns that are often used.

This is a snippet of javadoc how a extKey is guessed from information:

     * 1.) A KEY itself is tried.
     *     Example: my_extension
     * 2.) A classname of the pattern tx_KEY_something_else is tried.
     *     Example: tx_myextension_view
     * 3.) A full classname of the pattern ' *
tx_KEY_something_else.php' is tried.
     *     Example: class.tx_myextension_view.php
     *     Example: brokenPath/class.tx_myextension_view.php
     * 4.) A path that starts with the KEY is tried.
     *     Example: my_extension/class.view.php

With this most classes can be loaded with a few bits of information:

tx_div::loadClass('tx_myextension_view');
tx_div::loadClass('my_extension/class.view.php');

But the mayor use of this is for cases like:

$view = tx_div::makeInstance('tx_myextension_view');

It includes autoloading, even for PHP4.

Please consider, that there is some danger in doing this, because you
can't be 100% sure which files will be included. Only use it the
hardcoded way, where you can check the results. Never pass user input
to the function.

Regards

Elmar