{"id":29285,"date":"2023-01-06T17:37:12","date_gmt":"2023-01-06T12:07:12","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-search-engine-in-php-closed\/"},"modified":"2023-01-06T17:37:12","modified_gmt":"2023-01-06T12:07:12","slug":"solved-search-engine-in-php-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-search-engine-in-php-closed\/","title":{"rendered":"[Solved] Search Engine in php? [closed]"},"content":{"rendered":"

[ad_1]
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There are four basic functions that a search engine must perform:<\/p>\n

    \n
  1. Gather a list of websites to crawl.<\/li>\n
  2. Download the content of each of those web sites, and build up a mapping of “keywords” to pages.<\/li>\n
  3. Allow users to type in keywords and then match those keywords against the mapping you built in step #2.<\/li>\n
  4. Display the results from step #3 in a order that is relevant to the user.<\/li>\n<\/ol>\n

    It sounds simple, and if you have a small number of pages to search then it typically is. The difficulty comes from scaling from a 100s of pages to the billions of pages on the internet today.<\/p>\n

    Most of the difficulty – and what makes google better than many other engines – is not the technical ability to “search” billions of pages (that is, step 1-3), but deciding which<\/em> of those billions of pages to show at (or near) the top<\/em> of results (that’s step #4).<\/p>\n

    For example, when you type “stack overflow” into google, there’s 2.1 million<\/em> pages in their index that matches those keywords: the thing that makes google good is it’s algorithm for deciding that this<\/em> stack overflow should appear as the first result (as opposed to say, the wikipedia article on the subject)<\/p>\n

    The way they do that is the subject of many<\/em> university student dissertations, white papers, books and speculation. Rest assured the actual algorithm is a closely guarded secret at google and I doubt there’s many who know the intimate details of every aspect of it. It’s also something that’s constantly changing.<\/p>\n<\/p><\/div>\n

    <\/div>\n<\/div>\n

    <\/span> <\/p><\/div>\n<\/div>\n

    [ad_2]<\/p>\n

    solved Search Engine in php? [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"

    [ad_1] There are four basic functions that a search engine must perform: Gather a list of websites to crawl. Download the content of each of those web sites, and build up a mapping of “keywords” to pages. Allow users to type in keywords and then match those keywords against the mapping you built in step … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[529,339,5146],"class_list":["post-29285","post","type-post","status-publish","format-standard","hentry","category-solved","tag-logic","tag-php","tag-search-engine"],"yoast_head":"\n[Solved] Search Engine in php? 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