PUBLIC MARKS with tags php & "search engine"

Xapian is an Open Source Probabilistic Information Retrieval library, released under the GPL. It's written in C++, with bindings to allow use from other languages (Perl, Python, PHP, Java, and TCL are currently supported; Guile and C# are being worked on). Xapian is designed to be a highly adaptable toolkit to allow developers to easily add advanced indexing and search facilities to their own applications. If you're after a packaged search engine for your website, you should take a look at Omega, which is an application we supply built upon Xapian. But unlike most other website search solutions, Xapian's versatility allows you to extend Omega to meet your needs as they grow.