PHP Dynamic Pagination Without SQL

Question

I've got a script that dynamically calls and displays images from a directory, what would be the best way to paginate this? I'd like to be able to control the number of images that are displayed per page through a variable within the script. I'm thinking of using URL varriables (ie - http://domain.com/page.php?page=1) but am unsure how to go about this.

Thanks for the help.

Answer 1

pagination is the same concept with or without sql. you just need your basic variables, then you can create the content you want. here's some quasi-code:

$itemsPerPage = 5;

$currentPage = isset($_GET['page']) ? $_GET['page'] : 1;
$totalItems = getTotalItems();
$totalPages = ceil($totalItems / $itemsPerPage);

function getTotalItems() {
// since they're images, perhaps we'll scan a directory of images to determine
// how many images we have in total
}

function getItemsFromPage($page, $itemsPerPage) {
// function to grab $itemsPerPage based on which $page we're on
}

function getPager($totalPages, $currentPage) {
// build your pager
}

hope that helps you get started!

Answer 2

If you name your images 01.jpg, 02.jpg it makes it easier to paginate. Then use glob to get all the images into an array and sort it.

Answer 3

This is a function I often use to do pagination. Hope it helps.

function paginate($page, $total, $per_page) {
 if(!is_numeric($page)) { $page = 1; }
 if(!is_numeric($per_page)) { $per_page = 10; }
 if($page > ceil($total / $per_page)) $page = 1;
 if($page == "" || $page == 0) { 
  $page = 1;
  $start = 0;
  $end = $per_page;
 } else {
  $start = ($page * $per_page) - ($per_page);
  $end = $per_page;
 }

 $prev_page = "";
 $next_page = "";
 $all_pages = array();
 $selected = "";
 $enabled = false;

 if($total > $per_page) {
  $enabled = true;
  $prev = $page - 1;
  $prev_page = ($prev == 0) ? 0 : $prev;

  $next = $page + 1;
  $total_pages = ceil($total/$per_page);

  $next_page = ($next <= $total_pages) ? $next : 0;

  for($x=1;$x<=$total_pages;$x++) {
   $all_pages[] = $x;
   $selected = ($x == $page) ? $x : $selected; 
  }
 }

 return array(
  "per_page" => $per_page,
  "page" => $page,
  "prev_page" => $prev_page,
  "all_pages" => $all_pages,
  "next_page" => $next_page,
  "selected" => $selected,
  "start" => $start,
  "end" => $end,
  "enabled" => $enabled
 );
}

// ex: we are in page 2, we have 50 items, and we're showing 10 per page
print_r(paginate(2, 50, 10));

This will return:

Array
(
    [per_page] => 10
    [page] => 2
    [prev_page] => 1
    [all_pages] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
            [3] => 4
            [4] => 5
        )
    [next_page] => 3
    [selected] => 2
    [start] => 10
    [end] => 10
    [enabled] => 1
)

With all that data you are then pretty well armed to make the pagination links.

Answer 4

When in doubt use javascript! This might help too: http://www.webplicity.net/flexigrid/

Might be good for galery-like apps, though I've never tried it :)