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Modules
Modules are used to display small pieces of content, usually to the left, right, top or
bottom of a rendered page. There are a number of core modules with which we will
be instantly familiar, for example the menu modules.
Plugins
There are various types of plugin, each of which can be used differently; however,
most plugins are event driven. Plugins can attach listener functions and classes to
specific events that Joomla! can throw using the global event dispatcher.
Chapter 1
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This table describes the different core plugin types:
Plugin Type Description
authentication Authenticate users during the login process
content Process content items before they are displayed
editors WYSIWYG editors that can be used to edit content
editors-xtd Editor extensions (normally additional editor buttons)
search Search data when using the search component
system System event listeners
user Process a user when actions are performed
xmlrpc Create XML-RPC responses
In addition to the core plugin types we can define our own types.


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