As I said before it’s just a guidance.
It changes nothing, but you can check the XHR request with your browser developer tools, where besides the regular request you will see the dumped structure of the $pageposts variable.
If you want to change the results, you need to change the content of the $pageposts variable, but before you can do that, you need to understand what’s in there, that’s why I suggested that function.
I highly recommend reading about filters and actions first before you proceed: http://codex.wordpress.org/Plugin_API
I don’t know what you are trying to achieve exactly, so that’s why I suggested the guidelines.
Best,Ernest Marcinko
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