Question

I am trying to do a paging from single array

$input = Array
        (
            [0] => 'A',
            [1] => 'B',
            [2] => 'C'
            ...

        )

example $show_per_page=2;

in page 1

paging($input,$page, $show_per_page);

$output = Array(
                [0]=>'A',
                [1]=>'B'
        );

in page 2

$output = Array(                
                [2]=>'B'
        );

I Know about array_slice but it is not right for this case.Anyone know how to do this?

Answer 1

Yes, array_slice is exactly what you want. It’s the most efficient way to do this. Here’s what you need.

function get_page(array $input, $pageNum, $perPage) {
    $start = ($pageNum-1) * $perPage;
    $end = $start + $perPage;
    $count = count($input);

    // Conditionally return results
    if ($start < 0 || $count <= $start) {
        // Page is out of range
        return array(); 
    } else if ($count <= $end) {
        // Partially-filled page
        return array_slice($input, $start);
    } else {
        // Full page 
        return array_slice($input, $start, $end - $start);
    }
}