Zend_Search_Lucene is a general purpose text search engine
written entirely in PHP 5. Since it stores its index on the
filesystem and does not require a database server, it can add search capabilities to
almost any PHP-driven website.
Zend_Search_Lucene supports the following features:
Ranked searching - best results returned first
Many powerful query types: phrase queries, boolean queries, wildcard queries, proximity queries, range queries and many others.
Search by specific field (e.g., title, author, contents)
Zend_Search_Lucene was derived from the Apache Lucene project.
The currently (starting from ZF 1.6) supported Lucene index format versions are 1.4 -
2.3. For more information on Lucene, visit http://lucene.apache.org/java/docs/.
Previous Zend_Search_Lucene implementations support the
Lucene 1.4 (1.9) - 2.1 index formats.
Starting from Zend Framework 1.5 any index created using pre-2.1 index format is
automatically upgraded to Lucene 2.1 format after the
Zend_Search_Lucene update and will not be compatible with
Zend_Search_Lucene implementations included into Zend
Framework 1.0.x.