按与PHP的相关性排序结果

Question

I have a search engine that, depending on what the users inputs, displays elements in an array in order of viewCount, uploadDate, and rating, but relevance is kicking my butt; I have no clue where to start.

First, data is retrieved from multiple xml/json feeds.

 $url1 = "http://api.site1.com/?q=$userinput";
 $url2 = "http://api.site2.com/?q=$userinput";
 $url3 = "http://api.site3.com/?q=$userinput";

 //get_and_decode is a function that gets and decodes data from the xml/json feed
 get_and_decode($url1);
 get_and_decode($url2);
 get_and_decode($url3);

Second, all the data is stored in an array.

Finally, the elements in the array are displayed for the user and sorted by either view count, upload date, or rating.

Can someone point me in the right direction? I am trying to learn how to calculate relevance.

Answer 1

Your problem is not related to a specific programming language, but more precisely of the algorithm used. First, try to determine a good algorithm to express relevance as a number. For example, you can try to start from ranking or relevancy .