I want to get related searches or keywords

问题:

How can I use php to categorise different keywords together for example to consider shoes, boots, nike, etc in the similar categories.

Any code would be appreciated.

回答1:

(Warning: a fundamentalist approach) Go to http://commons.media.mit.edu/ and http://www.cyc.com/cyc/opencyc. These are two open databases of common sense. Make several searches by categories you're interested in. You'll get some related terms for each category. Put it in a fast database of your liking, and you're set.

Also, various SEO people like to create clouds of related keywords in meta tags of relevant pages. Take a look at source of several such pages, extract and filter keywords.