View source for Extension Installer/Installer Hooks

== The ''install/update/discover_install/uninstall'' Hooks == <!--T:7-->

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The ''install/update'' hooks run where ''com_install'' ran that was after the files have been copied (except the manifest) and the database has been updated (except for the ''#__extensions'' or equivalent entry).

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The ''install'' hook runs only when a component is being installed, i.e. it wasn't already installed. The ''update'' hook runs when the component is being updated, i.e. when it was already installed. The ''discover_install'' hook runs when a component has all its files copied manually and the user is using the Discover feature of extensions manager to install it, i.e. let Joomla! update its database so that it "knows" about this component. The ''uninstall'' hook runs when the extension is being uninstalled.