RiSearch PHP is a high performance, powerful search engine, especially suitable for small and medium-sized site. RiSearch PHP is very fast, it can search 5000-10000 pages in less than 1 seconds. RiSearch is a search engine index, which means it first so your site index and establish a number according to the keyword database to store all your website pages for quick search of the. Risearch is a full-text search engine script, it put all the words are indexed in a single document in addition to define the key words of the configuration files excluded. RiSearch using classic reverse indexing algorithm (with the same large search engine), which is why it will be faster than any other search engine.
Sphinx is a SQL based full-text retrieval engine, can be combined with MySQL, PostgreSQL full text search, it can provide more professional search function than the database itself, make applications more easily achieve the full-text specialized retrieval. The Sphinx special for some scripting language designed to search the API interface, such as PHP, Python, Perl, Ruby, and MySQL also designed a storage engine plug-ins.
The characteristics of Sphinx:
High speed index (in the new CPU, nearly 10 MB/ seconds);
High speed search (text of 2-4G average query speed of less than 0.1 seconds);
High availability (text, a single CPU can support 100 GB 100M document);
Provide ranking good correlation
To support distributed search;
Provide document summary generation;
Provides search from a pluggable storage engine inside the MySQL on
Supports Boolean, phrase, and synonyms query;
Support each document a plurality of full-text retrieval domain (the default maximum 32);
Support multiple attributes of each document;
Support single byte code and UTF-8 code.
PhpDig is a development with PHP Web crawlers and search engines. Based on the dynamic and static pages are indexed to create a glossary. When a search query, it will sort rules must display contains the keyword search results page. PhpDig contains a template system and can index PDF, Word, Excel, and PowerPoint documents. PHPdig search engine is applicable to professional stronger, deeper personalization, use it to create a vertical search engine in a certain field is the best choice.
Snoopy is a powerful web content collector. Provides access to web content, submit the form function.
OpenWebSpider is an open source multi thread of Web Spider (robot: robot, crawler: Reptiles) and contains many interesting features of the search engine.
Sphider is a lightweight, using web spider and search engine PHP development, use Mysql to store data. Can use it to add your website search function. Sphider is very small, easy to install and modify, there have been thousands of websites using it.
Yioop! PHP is a search engine, general purpose and can be used for the Web search, or can provide the URL search and index all document search, including: HTML, PDF, DOC, PPT, RTF, RSS, XML, SVG, PNG, JPG, BMP, GIF, and sitemaps.