FuzzyIndex indexes text for performing fuzzy searches using PHP and SQLite. It can process a list of text strings and build a database which indexes snippets of those strings and the locations where they appear. The class can also search for given keywords and returns the locations of the indexed strings where the best-matching text appears. It uses SQLite to store the indexed text database, but the class can be extended to use a different database type. It uses certain heuristics to extract the snippets from the indexed text. These heuristics are implemented as separate classes which can be used interchangeably.
Multi-byte Keyword Generator extracts meta keywords from multi-byte text. It is an enhanced version of the "Automatic Keyword Generator" class originally written by Ver Pangonilo. This version provides better word segmentation, the ability to handle multi-byte strings, and support for text in multiple languages.