PHP分页颠倒

Question

我的标准分页效果很好。我想做的就是把它颠倒过来。所以导航将从头开始。 5 | 4 | 3 | 2 | 1.我每页的限制是 15，所以我希望第 1 页包含 15 个元素，最后一页将包含最新的元素。我知道这是非常不寻常的方法，但这是我想做的。但我需要有人让我走上正确的道路并提供一些帮助，拜托。谢谢。

我的功能代码在这里：（缩短）

<?

$adjacents = 4;

$result = $mysqli->query("SELECT * FROM table");
$total_pages = $result->num_rows;
$result->close();

    /* Setup vars for query. */
    $targetpage = "articles";
    $limit = 15;                                
    $page = $_GET['page'];
    if($page) 
        $start = ($page - 1) * $limit;  
    else
        $start = 0;         

    /* Get data. */
    $sql = $mysqli->query("SELECT * FROM table ORDER BY id DESC LIMIT $start, $limit");


    /* Setup page vars for display. */
    if ($page == 0) $page = 1;                  //if no page var is given, default to 1.
    $prev = $page - 1;                          //previous page is page - 1
    $next = $page + 1;                          //next page is page + 1
    $lastpage = ceil($total_pages/$limit);      //lastpage is = total pages / items per page, rounded up.
    $lpm1 = $lastpage - 1;                      //last page minus 1


while($row = $sql->fetch_array())  {

$name = $row['name'];
$ource = $row['source'];

}

?>

<?=$pagination?>
<? $sql->close(); ?>

Answer 1

嗯...第一个提示 - 不要使用短开头的 php 标签。它们已被弃用，并且可能在某些服务器上给您带来问题.. 使用 <?php 启动 php 代码。

其次，在您的代码中，您混合了显示寻呼机和页面内容的混合部分。该 mySql 查询用于获取当前页面的行。但是对于寻呼机，您将需要类似的查询，它将仅返回所有行的计数（因此没有限制部分）。

 $sql = $mysqli->query("SELECT COUNT(*) FROM table");

类似的...

当您获得该计数时（假设您总共有 45 行）。您必须计算总页数。就像：

$pages_number = ceil ($rows_count / $limit );

在我们的例子中，我们将有 3 个（页面）。

然后，您需要一些向后循环的 for 循环，从页数到 1，类似于：

for ($i = $pages_number; $i > 1; $i--){
 // write out current link
}

这个循环会给你数字 3,2,1...所以用它们创建链接并打印出来。

Answer 2

<?php
$result = $mysqli->query("SELECT COUNT(*) FROM webelements WHERE web='ALR' AND cat='Article'");
$total_results = $result->num_rows;
$result->close();

    /* Setup vars for query. */
    $targetpage = "moving-articles";
    $limit = 15;                                
    $page = $_GET['page'];
    if($page) 
        $start = ($page - 1) * $limit;  
    else
        $start = 0;         

    /* Get data. */
    $sql = $mysqli->query("SELECT * FROM webelements WHERE web='ALR' AND cat='Article' ORDER BY datestamp DESC LIMIT $start, $limit");

    $prev = $page - 1;                          //previous page is page - 1
    $next = $page + 1;                          //next page is page + 1
    $lastpage = ceil($total_results/$limit);    //lastpage  = total results / items per page, rounded up.
    if ($page == 0) $page = $lastpage;          //if no page var is given, default to last page (as first page)
    $lpm1 = $lastpage - 1;                      //last page minus 1

    /* Draw the pagination object.  */

    $pagination = "";
    if($lastpage > 1)
    {   
        $pagination .= "
        <div class='pagination'>";
        /* Next Button */
        if ($page < $lastpage) 
            $pagination.= "<a href='$targetpage/page/$next/'>« next</a>";
        else
            $pagination.= "<span class='disabled'>« next</span>";   

        /* Backwards Pagination */
        for ($counter = $lastpage; $counter > 0; $counter--) {
                if ($counter == $page)
                    $pagination.= "<span class='current'>$counter</span>";
                else
                    $pagination.= "<a href='$targetpage/page/$counter/'>$counter</a>";
        }

        /* Previous Button */
        if ($page > $counter - 1) 
            $pagination.= "<a href='$targetpage/page/$prev/'>previous »</a>";
        else
            $pagination.= "<span class='disabled'>previous »</span>";

        $pagination.= "</div>";     
    }
?>

Answer 3

<?php
$result = $mysqli->query("SELECT id FROM table");
$total_results = $result->num_rows;
$result->close();

    /* Setup vars for query. */

    $targetpage = "moving-articles";
    $limit = 5; 
    $adjacents = 5;
    $lastpage = ceil($total_results/$limit);                                
    $page = $_GET['page'];
    if( $page) 
        $start = ($page - 1) * $limit;  
    else
        $start = ($lastpage - 1) * $limit;; 

    /* Get data. */
    $sql = $mysqli->query("(SELECT * FROM table ORDER BY datestamp LIMIT $start, $limit) ORDER BY datestamp DESC");
    if ($page == '') $page = $lastpage; //if no page var is given, default to last page (as first page)
    $prev = $page - 1;                          //previous page is page - 1
    $next = $page + 1;                          //next page is page + 1
    $lpm1 = $lastpage - 1;                          


    /* Draw the pagination object.  */

    $pagination = "";
    if($lastpage > 1)
    {   
        $pagination .= "
        <div class='pagination'>";
        /* Next Button */
        if ($page < $lastpage) 
            $pagination.= "<a href='$targetpage/page/$next/'>« next</a>";
        else
            $pagination.= "<span class='disabled'>« next</span>";   

        if ($lastpage < $adjacents * 4) //not enough pages to bother breaking it up
        {   
        /* Backwards Pagination */
        for ($counter = $lastpage; $counter > 0; $counter--) {
                if ($counter == $page)
                    $pagination.= "<span class='current'>$counter</span>";
                else
                    $pagination.= "<a href='$targetpage/page/$counter/'>$counter</a>";
        }
        }

        else if($lastpage > $adjacents * 4) //enough pages to hide some
        {
            //close to beginning; only hide later pages
            if($page > $lastpage - $adjacents * 2)      
            {

                for ($counter = $lastpage ; $counter > abs(($adjacents * 2) - $lastpage) - 1; $counter--)
                {
                    if ($counter == $page)
                        $pagination.= "<span class='current'>$counter</span>";
                    else
                        $pagination.= "<a href='$targetpage/page/$counter/'>$counter</a>";                  
                }

                $pagination.= "...";
                $pagination.= "<a href='$targetpage/page/2/'>2</a>";
                $pagination.= "<a href='$targetpage/page/1/'>1</a>";

            }
        //in middle; hide some front and some back
            else if($page <= $lastpage - $adjacents * 2 && $page > $adjacents * 2)
            {

                $pagination.= "<a href='$targetpage/page/$lastpage/'>$lastpage</a>";    
                $pagination.= "<a href='$targetpage/page/$lpm1/'>$lpm1</a>";
                $pagination.= "...";
                for ($counter = $page + $adjacents; $counter > $page - $adjacents - 1 ; $counter--)
                {
                    if ($counter == $page)
                        $pagination.= "<span class='current'>$counter</span>";
                    else
                        $pagination.= "<a href='$targetpage/page/$counter/'>$counter</a>";                  
                }
                $pagination.= "...";
                $pagination.= "<a href='$targetpage/page/2/'>2</a>";
                $pagination.= "<a href='$targetpage/page/1/'>1</a>";

            }
            //close to end; only hide early pages
            else
            {
                $pagination.= "<a href='$targetpage/page/$lastpage/'>$lastpage</a>";    
                $pagination.= "<a href='$targetpage/page/$lpm1/'>$lpm1</a>";
                $pagination.= "...";
                for ($counter = ($adjacents * 2) +1 ; $counter >= 1; $counter--)
                {
                    if ($counter == $page)
                        $pagination.= "<span class='current'>$counter</span>";
                    else
                        $pagination.= "<a href='$targetpage/page/$counter/'>$counter</a>";                  
                }
            }

        }


        /* Previous Button */
        if ($page > $counter - 1) 
            $pagination.= "<a href='$targetpage/page/$prev/'>previous »</a>";
        else
            $pagination.= "<span class='disabled'>previous »</span>";

        $pagination.= "</div>";     
    }

?>