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I followed this method of getting images from the media library.

// get the first image attached to the current post
function aldenta_get_post_image($size = 'thumbnail') {
    global $post;

    $photos = get_children( array('post_parent' => $post->ID, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID') );

    if ($photos) {
        $photo = array_shift($photos);
        return wp_get_attachment_image($photo->ID, $size);
    }

    return false;
}

But I want to paginate the results, how can I do that?

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Paginate it based on what? A set query var? A value passed into the function? –  t31os Mar 9 '11 at 15:59
    
@t31os, currently, if there are 100 images, it will show them all, I want to limit the results to something like 20 maybe? so that the user wont see 100s of images at once –  JM at Work Mar 10 '11 at 2:18
    
Did you post the wrong function then, the above function looks like it would only give a single result. Also, you unfortunately didn't answer my question(see previous comment). –  t31os Mar 10 '11 at 11:37

2 Answers 2

get_children() returns an array of posts, not a query that can be looped through and therefore paginated.

I would encourage you to use WP_Query instead. This WPSE answer should provide a code snippet to get you started. Then it should just be a matter of looping through the query and using standard WP paging.

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Downside to WP_Query is that there is no hierarchical argument. You can only get children 1 layer deep. –  AlxVallejo Sep 28 '12 at 15:17

Use the 'offset' parameter like in get_posts(). You can take the number of the page you're on as value.

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This assumes your page is $paged. How do you break up a get_children query (or get_posts) to be paged? –  AlxVallejo Sep 28 '12 at 15:49
    
The same way. You have the current page number stored somewhere. Otherwise the code is broken already. –  toscho Sep 28 '12 at 15:51
    
'posts_per_page' does not work in get_pages, like it does in wp_query. You can limit the query, but not the display. –  AlxVallejo Sep 28 '12 at 17:04

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