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     This is a tutorial where the author describes to create internal search engine using meta tags as this diary entiries would also fetch external search engines. get_meta_tags takes all meta tags and generate associative arrays with name which being the meta name and value of associative arrays which being the content of the meta tag. The algorithms of this search engine is is compare the contents of the meta variable to the search criteria from yesterday's diary entry and if there is a match it displays the appropriate link.