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1.创建一个用户类

文件 users.php 代码:

<?php
    // 用户类
    class User{
        public $phone;
        public $pwd;
        public $name;
        public $age;
        public $status;
        //登录
        public function login($uphone,$upwd){
            require('db.php');
            $sql = "select * from users where u_phone = '".$uphone."' and u_pwd ='".md5($upwd)."'";
            $stmt = $pdo -> prepare($sql);
            $res = $stmt -> execute();
            if ($res) {
            $row = $stmt -> fetch();
            if (!empty($row)) {
                return array('code'=>1,'msg'=>"登录成功",'res'=>$row);
            }else {
                return array('code'=>0,'msg'=>'登录失败');
            };
            };
        }
        //获取用户信息
        public function getUser($id){
            require('db.php');
            $sql = "select * from users where u_id = ".$id."";
            $stmt = $pdo -> prepare($sql);
            $res = $stmt -> execute();
            if ($res) {
            $row = $stmt -> fetch();
            if (!empty($row)) {
                return array('code'=>1,'msg'=>"成功",'res'=>$row);
            }else {
                return array('code'=>0,'msg'=>'失败');
            };
            };
        }
        //获取用户列表
        public function getUserList(){
            require('db.php');
            $sql = "select * from users";
            $stmt = $pdo -> prepare($sql);
            $res = $stmt -> execute();
            if ($res) {
            $row = $stmt -> fetchAll();
            if (!empty($row)) {
                return array('code'=>1,'msg'=>"成功",'res'=>$row);
            }else {
                return array('code'=>0,'msg'=>'失败');
            };
            };
        }
        //注册
        public function add($uphone,$upwd,$uname,$uage){
            require('db.php');
            $sql = "insert into `users`(`u_phone`,`u_pwd`,`u_name`,`u_age`,`u_createtime`) values('".$uphone."','".md5($upwd)."','".$uname."',".$uage.",".time().")";
            $stmt = $pdo -> prepare($sql);
            $stmt -> execute();
            if ($stmt -> rowCount() > 0) {
            return array('code'=>1,'msg'=>"注册成功");
            }else {
            return array('code'=>0,'msg'=>'注册失败');
            };
        }
        //修改
        public function update($id,$name,$age,$pwd,$status){
            require('db.php');
            if (!empty($pwd)) {
                $sql = "update `users` set `u_name`='".$name."',`u_age`=".$age.",`u_pwd`= '".md5($pwd)."',`u_status`=".$status." where `u_id` = ".$id.";";
            }else {
                $sql = "update `users` set `u_name`='".$name."',`u_age`=".$age.",`u_status`=".$status." where `u_id` = ".$id.";";
            }
            $stmt = $pdo -> prepare($sql);
            $stmt -> execute();
            if ($stmt -> rowCount() > 0) {
            return array('code'=>1,'msg'=>"修改成功");
            }else {
            return array('code'=>0,'msg'=>'修改失败');
            };
        }
        //删除
        public function delete($uid){
            require('db.php');
            $sql = "delete from `users` where `u_id` = ".$uid;
            echo $sql;
            $stmt = $pdo -> prepare($sql);
            $stmt -> execute();
            if ($stmt -> rowCount() > 0) {
            return array('code'=>1,'msg'=>"删除成功");
            }else {
            return array('code'=>0,'msg'=>'删除失败');
            };
        }
    }
?>

2.注册用户

文件 reg.php 代码:

<?php
    require_once('users.php');
    if (isset($_POST['submit'])) {
        $user = new User();
        $u = $user->add($_POST['phone'],$_POST['pwd'],$_POST['name'],$_POST['age']);
        if ($u['code']) {
            print_r($u);
            echo "<script>alert('".$u['msg']."');location.href='login.php'</script>";
        } else {
            echo "<script>alert('".$u['msg']."');</script>";
        }
    }
?>
<!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>注册</title>
    <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.6.0/css/bootstrap.css" rel="stylesheet" />
</head>
<body>
    <div class="jumbotron">
        <h1 class="display-4">用户注册</h1>
        <hr class="my-4">
        <form method="POST" action="" >
            <div class="form-group">
                <label>姓名</label>
                <input class="form-control" type="text" name="name">
            </div>
            <div class="form-group">
                <label>手机号</label>
                <input class="form-control" type="text" name="phone">
            </div>
            <div class="form-group">
                <label>密码</label>
                <input class="form-control" type="password" name="pwd">
            </div>
            <div class="form-group">
                <label>年龄</label>
                <input class="form-control" type="number" name="age">
            </div>
            <hr class="my-4">
            <button type="submit" name="submit" class="btn btn-primary">立即注册</button>
            <a  href="login.php" class="btn btn-success">登录</a>
        </form>
    </div>
</body>
</html>

3.登录

文件 login.php 代码:

<?php
    require_once('users.php');
    if (!empty($_POST['phone'])) {
        $user = new User();
        $u = $user->login($_POST['phone'],$_POST['pwd']);
        if ($u['code']) {
            echo "<script>alert('".$u['msg']."');location.href='list.php'</script>";
        } else {
            echo "<script>alert('".$u['msg']."');</script>";
        }
    }
?>
<!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>登录</title>
    <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.6.0/css/bootstrap.css" rel="stylesheet" />
</head>
<body>
    <div class="jumbotron">
        <h1 class="display-4">登录</h1>
        <hr class="my-4">
        <form method="POST" action="" >
            <div class="form-group">
                <label>手机号</label>
                <input class="form-control" type="text" name="phone">
                <small class="form-text text-muted">请输入手机号码</small>
            </div>
            <div class="form-group">
                <label>密码</label>
                <input class="form-control" type="password" name="pwd">
            </div>
            <button type="submit" class="btn btn-primary">登录</button>
            <a  href="reg.php" class="btn btn-success">注册</a>
        </form>
    </div>
</body>
</html>

4.用户列表&删除用户

文件 list.php 代码:

<?php
    require_once('users.php');
    $user = new User();
    $u = $user->getUserList();
    if (!empty($_GET['id'])) {
        $res = $user -> delete($_GET['id']);
        if ($res['code'] === 1) {
            echo "<script>alert('".$res['msg']."');location.href='list.php'</script>";
        } else {
            echo "<script>alert('".$res['msg']."');</script>";
        }
    }
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>用户列表</title>
    <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.6.0/css/bootstrap.css" rel="stylesheet" />
</head>
<body>
    <div class="jumbotron">
        <h1 class="display-4">用户列表</h1>
        <hr class="my-4">
        <table class="table">
            <thead class="thead-dark">
                <tr>
                    <th>ID</th>
                    <th>手机号</th>
                    <th>用户名</th>
                    <th>年龄</th>
                    <th>注册日期</th>
                    <th>状态</th>
                    <th>操作</th>
                </tr>
            </thead>
            <tbody>
                <?php foreach ($u['res'] as $user) { ?>
                <tr>
                    <td><?=$user['u_id']?></td>
                    <td><?=$user['u_phone']?></td>
                    <td><?=$user['u_name']?></td>
                    <td><?=$user['u_age']?></td>
                    <td><?=date('Y-m-d',$user['u_createtime'])?></td>
                    <td><?=$user['u_status'] == 0?'<span class="badge badge-warning">待审</span>':'<span class="badge badge-success">正常</span>'?></td>
                    <td>
                        <a href="edit.php?id=<?=$user['u_id']?>" class="btn btn-primary btn-sm">修改</a>
                        <a href="list.php?id=<?=$user['u_id']?>" class="btn btn-danger btn-sm">删除</a>
                    </td>
                </tr>
                <?php } ?>
            </tbody>
        </table>
    </div>
</body>
</html>

5.编辑用户

文件 edit.php 代码:

<?php
    require_once('users.php');
    $id = $_GET['id'];
    $info = array();
    if (!empty($id)) {
        $user = new User();
        //读取用户信息
        $uinfo = $user -> getUser($id);
        if ($uinfo['code'] == 1) {
            $info  =  $uinfo['res'];
        }
        //提交修改
        if(isset($_POST['submit'])){
            $status = $_POST['status'];
            $u = $user-> update($id,$_POST['name'],$_POST['age'],$_POST['pwd'],$status == 'on'? $status=1:$status=0);
            if ($u['code']) {
                echo "<script>alert('".$u['msg']."');location.href='list.php'</script>";
            } else {
                echo "<script>alert('".$u['msg']."');</script>";
            }
        }
    }else {
        echo "<script>alert('请选择用户');</script>";
    }
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>修改用户信息</title>
    <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.6.0/css/bootstrap.css" rel="stylesheet" />
</head>
<body>
    <div class="jumbotron">
        <h1 class="display-4">编辑用户信息</h1>
        <hr class="my-4">
        <form method="POST" action="" >
            <div class="form-group">
                <label>姓名</label>
                <input class="form-control" type="text" name="name" value="<?=$info['u_name']?>">
            </div>
            <div class="form-group">
                <label>手机号</label>
                <input class="form-control" type="text" name="phone" value="<?=$info['u_phone']?>" readonly>
            </div>
            <div class="form-group">
                <label>密码</label>
                <input class="form-control" placeholder="不填为不修改" type="password" name="pwd" value="">
            </div>
            <div class="form-group">
                <label>年龄</label>
                <input class="form-control" type="number" name="age" value="<?=$info['u_age']?>">
            </div>
            <div class="form-group">
                <div class="custom-control custom-switch">
                    <input type="checkbox" class="custom-control-input" name="status" <?=$info['u_status']==1?'checked':''?> id="status">
                    <label class="custom-control-label" for="status">状态</label>
                </div>
            </div>
            <hr class="my-4">
            <button type="submit" name="submit" class="btn btn-primary">提交修改</button>
        </form>
    </div>
</body>
</html>

6.运行效果

列表页:
登录页:
编辑页:

批改老师：

PHPz

批改状态：合格

老师批语：

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