<?php function getPortion($products, $page, $per_page) { $index = $page * $per_page; // to get always positive module $real_index = ($index % sizeof($products) + sizeof($products)) % sizeof($products); $return = array_slice($products, $real_index, $per_page); while (sizeof($return) < $per_page) { $return = array_merge($return, array_slice($products, 0, $per_page - sizeof($return))); } return $return; } $products = array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k'); // 0 page echo json_encode(getPortion($products, 0, 3)); // ["a","b","c"] // 3 page echo json_encode(getPortion($products, 3, 3)); // ["j","k","a"] // -1 page echo json_encode(getPortion($products, -1, 3)); // ["i","j","k"] // 0 page, but per_page larger than array length. echo json_encode(getPortion(array('a', 'b', 'c'), 0, 5)); // ["a","b","c","a","b"]
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