Joomla! provides us with the class
JRegistry; this class enables us to store and retrieve data using namespaces. Data stored in a
JRegistry object is organized using a hierarchy based on namespaces.
Namespaces are unique hierarchical tree identifiers used to categorize data. Imagine we want to store the number of sightings of animals in an area. We could use the following hierarchy:
animal animal.total animal.bird animal.bird.chaffinch animal.bird.swan animal.mammal animal.mammal.badger animal.mammal.squirrel.red animal.mammal.squirrel.grey
Based on this example, if we wanted to know how many badgers we have sighted, we would retrieve the value using the registry path
animal.mammal.badger. If we wanted to know how many mammals ...