奪命雷公狗---微信開發35----公衆平臺營銷諮詢系統4（分頁）

時間 2019-12-10

原文原文鏈接

剛纔那幾節課程裏面將功能幾乎都實現了出來，公衆平臺營銷諮詢系統最後一部分就是分頁的實現了，show_info.php這裏修改下代碼分頁便可實現出來，代碼以下所示：javascript

<?php
    //連接數據庫
    $connect = mysql_connect('localhost','root','root');
    mysql_select_db('wxdb',$connect);
    mysql_query('set names utf8');
    //分頁開工咯，先取個別名counts
    $sql = "select count(*) as counts from zx_info";
    $res = mysql_query($sql);
    $row = mysql_fetch_assoc($res);
    //這裏的$row_num是總的諮詢條數
    $row_num = $row['counts'];
    //咱們規定每頁顯示5條記錄
    $page_size = 5;
    //計算總頁數
    $page_count = ceil($row_num/$page_size);
    //接收當前用戶點擊的是第幾頁
    $page_num = $_GET['page_num'];
    //判斷$page_num是否爲空,若是是空的默認給他一個1
    if(empty($page_num)){
        $page_num = 1;
    }
    //計算從那條記錄開始獲取
    $begin = ($page_num-1)*$page_size;
    $sql = "select * from zx_info order by id desc limit {$begin},{$page_size}";
    $info_res = mysql_query($sql);
?>
<!doctype html> 
<html> 
    <head> 
        <meta charset="utf-8">
        <title>公衆平臺營銷諮詢系統</title>
        <meta name="viewport" content="width=device-width,height=device-height,inital-scale=1.0,maximum-scale=1.0,user-scalable=no;">
        <meta name="apple-mobile-web-app-capable" content="yes">
        <meta name="apple-mobile-web-app-status-bar-style" content="black"> 
        <meta name="format-detection" content="telephone=no"> 
        <link href="./jquery.mobile-1.0.min.css" rel="stylesheet" type="text/css"> 
        <script src="./jquery-1.6.4.min.js" type="text/javascript"></script> 
        <script src="./jquery.mobile-1.0.min.js" type="text/javascript"></script> 
    </head> 
    <body>
        <div data-role='page' id='page3'>
            <div data-role='header'>
                <h1>公衆平臺營銷諮詢系統</h1>
            </div>
            
            <div data-role='content'>
                <ul data-role='listview'>
                    <?php
                        $row = array();
                        while($row = mysql_fetch_assoc($info_res)){ 
                    ?>
                        <li>
                            <a href="/reply_view.php?id=<?php echo $row['id']; ?>"><?php echo $row['zx_info']; ?>
                            <p class="ui-li-aside">回覆諮詢</p></a>
                        </li>
                    <?php } ?>
                </ul>
            </div>
            
            <!--分頁的按鈕開始-->
            <div data-role="controlgroup" data-type="horizontal">
            <?php
                if($page_num!=1 && $page_num>1){ ?>
                    <a href="/show_info.php?page_num=<?php echo $page_num-1; ?>" data-role="button">上一頁</a>
                <?php } ?>
            <?php
                if($page_count > $page_num){ ?>
                    <a href="/show_info.php?page_num=<?php echo $page_num+1; ?>" data-role="button">下一頁</a>
                <?php } ?>
            </div>
            <!--分頁的按鈕結束-->
        </div>
    </body> 
</html>

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