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Introduction - Zend_Tag
Zend_Tag is a component suite which provides a facility to work with taggable Items. As its base, it provides two classes to work with Tags, Zend_Tag_Item and Zend_Tag_ItemList. Additionally, it comes with the interface Zend_Tag_Taggable, which allows you to use any of your models as a taggable item in conjunction with Zend_Tag.
Zend_Tag_Item is a basic taggable item implementation which comes with the essential functionality required to work with the Zend_Tag suite. A taggable item always consists of a title and a relative weight (e.g. number of occurrences). It also stores parameters which are used by the different sub-components of Zend_Tag.
To group multiple items together, Zend_Tag_ItemList exists as an array iterator and provides additional functionality to calculate absolute weight values based on the given relative weights of each item in it.
Example #1 Using Zend_Tag
This example illustrates how to create a list of tags and spread absolute weight values on them.
This will output the three items Code, Zend Framework and PHP with the absolute values 10, 1 and 2.