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Wordpress allows administrators to change the number of posts that are printed out on a page at once on the page Settings > Reading. However, this also has an impact on the number of search results that Wordpress will display. In order to keep the size of the home page down many Wordpress admins will reduce the number of articles to two or three. This can instantly make search results with only a few results reach many pages.

If you want to incorporate a W3C validation check into an application then you can use the following class. It uses file_get_contents() to get the contents of the file and then uses regular expressions to return either the number of errors or -1 is any errors occur. Of course if the document is valid the function will return 0.