php search engine multyple keywords/tags

Can anyone suggest me a database structure or some explicit tut开发者_如何学Goorial for creating a search engine with multiple keywords?

The keywords have to match multiple tags not to be part of a string (like an article title)

example: I type in the search field the words: php mysql database and the script should return all entries with this tags.

Thank you!

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MyISAM has full text search, which basically allows you to search for strings, and returns the results in order of relevance (more info). I think that could be just what you're looking for!