PHP - Pagination withouth SQL [duplicate] - php

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

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 2

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 3

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 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 :)