php - 用于动态显示来自 mysql 的 10 条记录的 PHP 代码

Question

嗨，我有 25 行的 MySql 表，我想使用 PHP 在页面中显示前 10 行。当我单击下一步按钮时，它会显示表中的另外 10 行，依此类推...帮助我。谢谢..

Answer 1

非常广泛的问题，但基本可以使用“LIMIT” MySQL 命令解决。基本上，您的 PHP 代码会检测是否有人转到另一个页面，然后当它进行查询时，会调整“LIMIT”。所以对于第 1 页，这个 MySQL 伪代码中的“LIMIT”将是：

SELECT * FROM {my table} WHERE {criteria is this} LIMIT 0,10

对于第 2 页，“限制”将是这样的：

SELECT * FROM {my table} WHERE {criteria is this} LIMIT 11,20

至于 PHP 分页，你必须想出一些逻辑。也许——也是最传统的——通过 POST 传递 URL 变量，例如：

http://localhost/index.php?pn=2

然后你的 PHP 逻辑会做一些数学运算来确定范围的开始和结束。所以在这个例子中可能会做类似的事情：

$pn = $GET['pn'];
$per_page = 10;
$bottom_limit = (($pn*$per_page)-$per_page)+1);
$top_limit = ($pn*$per_page);

然后在 PHP 中，LIMIT 将按照以下方式放置：

$limit = " LIMIT " . $bottom_limit . ", " . $top_limit;

Answer 2

在查询中使用 LIMIT 语句.. 您需要使用 Php 进行分页..

Answer 3

示例分页代码如下。

尝试一下。

<?php

    include('config.php');  // include your code to connect to DB.
    $tbl_name="";       //your table name
    $adjacents = 3;

    $query = "SELECT COUNT(*) as num FROM $tbl_name";
    $total_pages = mysqli_fetch_array(mysqli_query($query));
    $total_pages = $total_pages[num];


    $targetpage = "filename.php";   //your file name  (the name of this file)
    $limit = 10;                                //how many items to show per page
    $page = $_GET['page'];
    if($page) 
        $start = ($page - 1) * $limit;          //first item to display on this page
    else
        $start = 0;                             //if no page var is given, set start to 0

    /* Get data. */
    $sql = "SELECT column_name FROM $tbl_name LIMIT $start, $limit";
    $result = mysqli_query($sql);

    /* 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

    /* 
        Now we apply our rules and draw the pagination object. 
        We're actually saving the code to a variable in case we want to draw it more than once.
    */
    $pagination = "";
    if($lastpage > 1)
    {   
        $pagination .= "<div class=\"pagination\">";
        //previous button
        if ($page > 1) 
            $pagination.= "<a href=\"$targetpage?page=$prev\">? previous</a>";
        else
            $pagination.= "<span class=\"disabled\">? previous</span>"; 

        //pages 
        if ($lastpage < 7 + ($adjacents * 2))    //not enough pages to bother breaking it up
        {   
            for ($counter = 1; $counter <= $lastpage; $counter++)
            {
                if ($counter == $page)
                    $pagination.= "<span class=\"current\">$counter</span>";
                else
                    $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
            }
        }
        elseif($lastpage > 5 + ($adjacents * 2)) //enough pages to hide some
        {
            //close to beginning; only hide later pages
            if($page < 1 + ($adjacents * 2))     
            {
                for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
                {
                    if ($counter == $page)
                        $pagination.= "<span class=\"current\">$counter</span>";
                    else
                        $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
                }
                $pagination.= "...";
                $pagination.= "<a href=\"$targetpage?page=$lpm1\">$lpm1</a>";
                $pagination.= "<a href=\"$targetpage?page=$lastpage\">$lastpage</a>";       
            }
            //in middle; hide some front and some back
            elseif($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2))
            {
                $pagination.= "<a href=\"$targetpage?page=1\">1</a>";
                $pagination.= "<a href=\"$targetpage?page=2\">2</a>";
                $pagination.= "...";
                for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++)
                {
                    if ($counter == $page)
                        $pagination.= "<span class=\"current\">$counter</span>";
                    else
                        $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
                }
                $pagination.= "...";
                $pagination.= "<a href=\"$targetpage?page=$lpm1\">$lpm1</a>";
                $pagination.= "<a href=\"$targetpage?page=$lastpage\">$lastpage</a>";       
            }
            //close to end; only hide early pages
            else
            {
                $pagination.= "<a href=\"$targetpage?page=1\">1</a>";
                $pagination.= "<a href=\"$targetpage?page=2\">2</a>";
                $pagination.= "...";
                for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++)
                {
                    if ($counter == $page)
                        $pagination.= "<span class=\"current\">$counter</span>";
                    else
                        $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
                }
            }
        }

        //next button
        if ($page < $counter - 1) 
            $pagination.= "<a href=\"$targetpage?page=$next\">next ?</a>";
        else
            $pagination.= "<span class=\"disabled\">next ?</span>";
        $pagination.= "</div>\n";     
    }
?>

    <?php
        while($row = mysqli_fetch_array($result))
        {

        // Your while loop here

        }
    ?>

<?=$pagination?>