Zend_Filter_Inflector uses
Zend_Loader_PluginLoader to manage loading filters to
use with inflection. By default, any filter prefixed with
Zend_Filter will be available. To access filters with
that prefix but which occur deeper in the hierarchy, such as the
various Word filters, simply strip off the Zend_Filter prefix:
<?php
// use Zend_Filter_Word_CamelCaseToDash as a rule
$inflector->addRules(array('script' => 'Word_CamelCaseToDash'));
To set alternate paths, Zend_Filter_Inflector has a
utility method that proxies to the plugin loader,
addFilterPrefixPath():
<?php
$inflector->addFilterPrefixPath('My_Filter', 'My/Filter/');
Alternatively, you can retrieve the plugin loader from the inflector, and interact with it directly:
<?php
$loader = $inflector->getPluginLoader();
$loader->addPrefixPath('My_Filter', 'My/Filter/');
For more options on modifying the paths to filters, please see the PluginLoader documentation.