Question

Sorry it haven’t occurred to me a better title :).

So I have two buttons that increase or decreases the decimal value of $page by 1, the problem is that I need to call external data whom paging system starts with 5 and adds 15 to change to next page, so $page‘s value don’t apply.

The question is: how can I change $page’s values from 1, 2, 3, 4… to 5, 20, 35, 50?

Answer 1

This should do it:

$start = 5;
$step = 15;
$result = $start + ($page-1) * $step;