ajax分页代码

Posted 2020-11-19 hopelooking

show.php

<meta charset="utf-8">
<?php
//连接数据库
$link = mysqli_connect(‘127.0.0.1‘,‘root‘,‘root‘,‘mone‘);
//设置字符集
mysqli_query($link,‘set names utf8‘);

//进行分页的操作

//接收当前页(如果是空的，我们就使用第一页，如果不是空的，我们就用接收到的值)
$page = empty($_GET[‘page‘])?1:$_GET[‘page‘];
//求出总条数
$sql = "select * from user";
$res = mysqli_query($link,$sql);
$count = mysqli_num_rows($res);
//每页显示的条数
$length = 3;
//总页数
$zong_page = ceil($count/$length);
//偏移量
$limit = ($page-1)*$length;
//查询
$sql2 = "select * from user limit $limit,$length";
$res2 = mysqli_query($link,$sql2);
while ($a = mysqli_fetch_assoc($res2)) {
    $data[] = $a;
}
?>

<table>
    <tr>
        <th>ID</th>
        <th>姓名</th>
        <th>密码</th>
        <th>性别</th>
        <th>年龄</th>
        <th>班级</th>
        <th>手机</th>
    </tr>

    <tbody id="tbody">

    <?php foreach($data as $k => $v){ ?>
    <tr>
        <td><?php echo $v[‘user_id‘];?></td>
        <td><?php echo $v[‘username‘];?></td>
        <td><?php echo $v[‘pwd‘];?></td>
        <td><?php echo $v[‘sex‘];?></td>
        <td><?php echo $v[‘age‘];?></td>
        <td><?php echo $v[‘class_name‘];?></td>
        <td><?php echo $v[‘phone‘];?></td>
    </tr>
    <?php } ?>

    </tbody>
</table>

<!--定义一个当前页的hidden-->
<input type="hidden" name="page" id="page" value="1">
<a href="javascript:void(0);" onclick="page(‘first‘)">首页</a>
<a href="javascript:void(0);" onclick="page(‘prev‘)">上一页</a>
<a href="javascript:void(0);" onclick="page(‘next‘)">下一页</a>
<a href="javascript:void(0);" onclick="page(‘last‘)">尾页</a>

<script>
    function page(obj){
        //获取一下当前页
        var current_page = document.getElementById(‘page‘).value;

        //判断页码
        if(obj==‘first‘){
            //首页
            var zhi = 1;
        }else if(obj==‘prev‘){
            var zhi = parseInt(current_page)-1;
        }else if(obj==‘next‘){
            var zhi = parseInt(current_page)+1;
        }else{
            var zhi = <?php echo $zong_page;?>
        }

        //发起ajax的请求

        //创建ajax对象
        var ajax = new XMLHttpRequest();
        //拼接路由
        ajax.open("get","fenye.php?page="+zhi);
        //发起请求
        ajax.send();
        //判断结果
        ajax.onreadystatechange=function(){
            if(ajax.readyState==4 && ajax.status==200){
                if(ajax.responseText==0){
                    alert(‘无数据‘);
                    return false;
                }else{
                    //有数据
                    var res = JSON.parse(ajax.responseText);
                    var str = ‘‘;
                    //开始我的循环
                    for(var i=0;i<res.length;i++){
                        //  res[i][‘username‘]
                        str+="<tr>";
                        str+="<td>"+res[i][‘user_id‘]+"</td>";
                        str+="<td>"+res[i][‘username‘]+"</td>";
                        str+="<td>"+res[i][‘pwd‘]+"</td>";
                        str+="<td>"+res[i][‘sex‘]+"</td>";
                        str+="<td>"+res[i][‘age‘]+"</td>";
                        str+="<td>"+res[i][‘class_name‘]+"</td>";
                        str+="<td>"+res[i][‘phone‘]+"</td>";
                        str+="</tr>";
                    }


                    //替换一下所有的内容
                    document.getElementById(‘tbody‘).innerhtml = str;
                    document.getElementById(‘page‘).value = zhi;
                }
            }
        }
    }
</script>

 

 

fenye.php

 

<?php
//连接数据库
$link = mysqli_connect(‘127.0.0.1‘,‘root‘,‘root‘,‘mone‘);
//设置字符集
mysqli_query($link,‘set names utf8‘);

//进行分页的操作

//接收当前页(如果是空的，我们就使用第一页，如果不是空的，我们就用接收到的值)
$page = empty($_GET[‘page‘])?1:$_GET[‘page‘];
//求出总条数
$sql = "select * from user";
$res = mysqli_query($link,$sql);
$count = mysqli_num_rows($res);
//每页显示的条数
$length = 3;
//总页数
$zong_page = ceil($count/$length);
//偏移量
$limit = ($page-1)*$length;
//查询
$sql2 = "select * from user limit $limit,$length";
$res2 = mysqli_query($link,$sql2);
while ($a = mysqli_fetch_assoc($res2)) {
    $data[] = $a;
}

//判断一下数组有没有值
if(empty($data)){
    //如果是空的，我这里输出一个0
    echo 0;
}else{
    //如果有值，echo一个json数据
    echo json_encode($data);
}
?>