没有SQL的PHP​​动态分页

Question

我有一个脚本可以动态调用和显示目录中的图像，最好的分页方式是什么？我希望能够通过脚本中的变量控制每页显示的图像数量。我正在考虑使用 URL 变量(即 - http://domain.com/page.php?page=1)，但我不确定如何去做。

感谢您的帮助。

Answer 1

这是我经常用来做分页的一个函数。希望对您有所帮助。

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));

这将返回:

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
)

有了所有这些数据，您就可以很好地制作分页链接。