如何对foreach循环进行分页？

Question

I have this foreach loop wich shows the supporters located in the post_meta from a custom post type. What I want to do is add pagination to the foreach loop. I have already found a way to decide how many supporters are shown by slicing the array, but now I am at a loss. And have no idea how to proceed.

Function to get the supporters array

function getSupporters($petitieID){
$support = get_post_meta(get_the_ID(), 'supporters', true);

if (!empty($support)){
    return $support;
}}

Function to show the individual supporters in the array

function showSupporters($petitieID){

$supporters = getSupporters($petitieID);
if (!empty($supporters)){
    foreach (array_slice($supporters, 0, 2) as $supporter){

    $supporterID = $supporter->post_author;
        the_author_meta('first_name', $supporterID);
    }

}else {

    echo    'no votes';
}
}

Answer 1

You could determine which page is currently shown in a GET variable in your address

.../supporters.php?page=1

Then you could set the offset of your array_slice function accordingly

$nItemsPerPage = 2;
$page = isset($_GET['page'])?$_GET['page']:1;
array_slice($supporters, $nItemsPerPage*($page-1), $nItemsPerPage)