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When we create classes such as this, it is common practice to place them in a special
folder called 'classes'. When creating a component we place this folder in the backend.
Supporting classes can extend existing Joomla! classes, for example the JObject class.
They can also be completely unrelated and separate works in their own right.
'PHP Classes', www.phpclasses.org/browse, is a good place to look for existing
classes that we can utilize.
Remember that, although Joomla! provides us with an excellent
framework, we should never feel restricted by it. There is nothing to
prevent us from building extensions in other ways.
Extension Design
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Helpers
Helpers are static classes used to perform common functions. Helpers often
complement one other class. For example, the static JToolBarHelper helper class
works in conjunction with the JToolBar class.
There are forty-nine helper classes in the Joomla! core alone.
When building helpers that complement another class, the functions that we place
within the helpers must relate to the other class.


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