数据分页显示

<?php require_once "header.php" ?>
<!DOCTYPE html>
<html lang="en">
    <head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>显示用户信息</title>
    <link rel="stylesheet" href="bootstrap.css">
    <style>
  /* 1. 添加表格线,添加给单元格 */
  tbody td,
  th {
    border: 1px solid;
  }
  /* 2. 折叠表格线 */
  table {
    border-collapse: collapse;
    width: 90%;
    /* 对齐 */
    text-align: center;
    margin: 2em auto;
  }
  /* 标题 */
  table thead {
    background-color: lightskyblue;
    line-height: 80px;
  }
  table tbody{
    line-height: 80px;
  }
  tbody tr:nth-of-type(2n){
      background-color: #ddd;
  }
  .show h2{
      text-align: center;
  }
</style>
</head>
<body>
    <?php 
     require_once "auto.php";  
     $p=$_GET['p']??1;
     $count=5;  //每页显示的记录条数
    $data=UserContr::GetAllUserPage($p,$count);
    //总记录行数
    $rowCount=UserContr::GetRowCount();
    $pages=ceil($rowCount/$count);
    ?>
    <div class="show">
        <h2>用户信息</h2>
        <table>
    <thead>
        <tr>
        <th><input type="checkbox" id="check_all"></th>
        <th>ID</th>
        <th>用户名</th>
        <th>姓名</th>
        <th>电话</th>
        <th>邮箱</th>
        <th>创建时间</th>   
        <th>最后登录时间</th> 
        <th>状态</th> 
    </tr>
</thead>
    <tbody>
    <?php foreach($data as $user):  ?>
    <tr>
        <td><input type="checkbox" class="chk_item"></td>
        <td class="id"><?=$user->id?></td>
        <td><a href="edituser.php?id=<?=$user->id?>" title="点击修改用户信息" ><?=$user->account?></a></td>
        <td><?=$user->name?></td>
        <td><?=$user->phone?></td>
        <td><?=$user->email?></td>
        <td><?=date('Y-m-d',$user->createtime)?></td>   
        <td><?=date('Y-m-d',$user->updatetime)?></td> 
        <td><?=$user->state==1?'开启':'关闭'?></td> 
    </tr>        
    <?php endforeach ?>
    </tbody>
    <tfoot>
        <tr>
            <td colspan="9">
        <nav aria-label="...">
  <ul class="pagination">
    <li class="page-item <?=$p==1?'disabled':''?>">
      <a class="page-link" href="showuser.php?p=<?=$p-1 ?>" tabindex="-1" aria-disabled="true">上一页</a>
    </li>
    <?php for($i=1;$i<=$pages;$i++): ?>
    <li class="page-item <?=$p==$i?'active':''?>"><a class="page-link" href="showuser.php?p=<?=$i ?>"><?=$i ?></a></li>
    <?php endfor ?>
    <li class="page-item <?=$p==$pages?'disabled':''?>">
      <a class="page-link  " href="showuser.php?p=<?=$p+1 ?>">下一页</a>
    </li>
  </ul>
</nav>
        </td></tr>
        <tr><td colspan="3"><button onclick="del()">删除</button></td>
        <td><a href="adduser.php">添加用户</a></td>
    </tr>
    </tfoot> 
        </table>
    </div>
    <script>
        const chkAll=document.querySelector("#check_all");
        const chkItems=document.querySelectorAll(".chk_item");
        chkAll.onchange=ev=>chkItems.forEach(item=>item.checked=ev.target.checked);
        chkItems.forEach(item=>item.onchange=()=>chkAll.checked=[...chkItems].every(item=>item.checked));
        function del(){
            if(confirm('您确定要删除这些用户吗？')){
                const chkItems=document.querySelectorAll(".chk_item");
                chkItems.forEach(item=>{
                    if(item.checked){
                       const id=item.parentElement.nextElementSibling.textContent;
                       let isDel=delOpt(id);  
                       if(isDel){
                        //    console.log( item.parentElement.parentElement);
                           item.parentElement.parentElement.remove();
                       }                     
                    }
                })
            }else{
                alert("NO");
            }
        }
        async function delOpt(id){
            const response = await fetch("del_user.php?id=" + id);
            const comments = await response.json();
            return comments;
        }
    </script>
    <script src="./js/jquery-3.5.1.min.js"></script>
    <script src="./js/bootstrap.bundle.js"></script>
</body>
</html>

UserContr.php 文件中分页和记录总数方法

<?php
require_once "auto.php";
class UserContr{ 
// 分页显示
    public static function GetAllUserPage($p,$count){
        $start=($p-1)*$count;
        $sql="SELECT * FROM `php_user` LIMIT $start ,$count";
        $pdo =CreatePDO::Create();
        $pre=$pdo->prepare($sql);
        $exec=$pre->execute();
        $data = $pre -> fetchAll(PDO::FETCH_OBJ);
        return $data;
    }
    //记录行数
    public static function GetRowCount(){
        $sql="SELECT count(*) as rowCount FROM `php_user`";
        $pdo=CreatePDO::Create();
        $pre=$pdo->prepare($sql);
        $exec=$pre->execute();
        $res=$pre->fetch(PDO::FETCH_ASSOC);
        return $res['rowCount'];
    }
}

CreatePDO.php 文件


<?php
class CreatePDO{    
    public static function Create(){
        try{
            $pdo = new PDO('mysql:host=127.0.0.1;dbname=prodb','root','123456');
        }catch(PDOException $e){
                // 抛出错误，错误是你可以定义的
            echo json_encode(['status'=>9,'msg'=>'数据库链接失败']);
            exit;
        } 
        return  $pdo;
    }
}

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