PHP+MYSQL开发一个简单的登录功能(cookie及session操作)——2018年4月20日 - 课程作业

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index.php实例

<?php
$page_title='首页';

include('inc/header.php');

if ((isset($_COOKIE['id'])) && basename($_SERVER['PHP_SELF']) != 'loginout.php'){
    echo '<a href="loginout.php">退出</a>';
}else{
    echo '<a href="login.php">登录</a>';
}

include ('inc/footer.php');

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login.php实例

<?php

if ($_SERVER['REQUEST_METHOD']=='POST'){

require 'inc/mysql.php';
require 'inc/function.php';

    list($check,$data) = login_check($mysql,$_POST['username'],$_POST['password']);
        if ($check){
            setcookie('id',$data['id']);
            setcookie('name',$data['name']);
            jumpto('member.php');
        }else{
            $errors = $data;
            echo "<script>alert('".$errors[0]."');</script>";
        }
    mysqli_close($mysql);
}

require 'login_page.php';

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login_page.php实例

<?php
$page_title = '用户登录';
include 'inc/header.php';
?>

<div class="login">
    <h3>会员登录</h3>
    <form action="login.php" method="post">
        <p>
            <label for="username">账号：</label>
            <input type="text" name="username" id="username">
        </p>
        <p>
            <label for="password">密码：</label>
            <input type="password" name="password" id="password">
        </p>
        <p>
            <button type="submit" name="btn_login" id="btn_login">立即登录</button>
        </p>
    </form>
</div>
<?php
include ('inc/footer.php');
?>

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loginout.php实例

<?php
if (!isset($_COOKIE['id'])){
    require 'inc/function.php';

    jumpto('login.php');
}else{
    setcookie('id','',time()-3600);
    setcookie('name','',time()-3600);
}
$page_title='首页';

include('inc/header.php');
?>
<div class="main">
    <?php
    echo '<h1 style="color: #ff8bac;">退出成功</h1><a href="login.php">登录</a><br>';
    ?>
</div>
<?php


include ('inc/footer.php');
?>

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member.php

实例

<?php
if (!isset($_COOKIE['id'])){
    require 'inc/function.php';

    jumpto('login.php');
}
$page_title='会员中心';
include 'inc/header.php';?>
<div class="main">
    <?php
    echo '<h2>登录成功</h2><br>';
    echo '<span style="color: red;font-size: 2em">用户id：'.$_COOKIE['id'].'</span>';
    echo '<br>';
    echo '<span style="color: red;font-size: 2em">用户姓名：'.$_COOKIE['name'].'</span><a href="loginout.php">退出</a>';
?>
</div>
<?php
include ('inc/footer.php');
?>

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inc目录下的文件：

header.php实例

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="../0420/css/style.css">
    <title>
        <?php echo $page_title ? $page_title:'未设置标题' ?>
    </title>
    <style type="text/css">

    </style>
</head>
<body>
<div class="header">
    <div class="header_top_bg">
        <div class="header_top">
        <div class="header_top_left">
            <span>欢迎访问本站！</span>
        </div>
            <div class="header_top_right">
                <?php
                if (isset($_COOKIE['id'])){
                    echo '<span>会员ID：'.$_COOKIE['id'].'  </span>';
                    echo '<span>会员姓名：'.$_COOKIE['name'].'  <a href="../0420/loginout.php">退出</a></span>';

                }else{
                    echo '<span><a href="../0420/login.php">登录</a></span>';
                }
                ?>
            </div>

        </div>
        <div class="header_nav">
            <h1>顶部</h1>
        </div>

    </div>

</div>

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footer.php实例

<div class="footer_bg">
    <div class="footer">
        <h2>底部信息</h2>
    </div>

</div>
</body>
</html>

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mysql.php实例

<?php
define('dbhost','127.0.0.1');
define('dbuser','xydb');
define('dbpass','123456');
define('dbname','xydb');
define('dbchar','utf8');

$mysql = mysqli_connect(dbhost,dbuser,dbpass,dbname);
if (mysqli_connect_errno($mysql)){
    echo '数据库连接失败'.mysqli_connect_errno($mysql);
}
mysqli_set_charset($mysql,dbchar);

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function.php

实例

<?php
function jumpto($page='index.php'){
    $url = 'http://'.$_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']);
    $url = rtrim($url,'/\\');
    $url .= '/'.$page;
    header('Location:'.$url);
    exit();
}
function login_check($mysql,$username_post,$password_post){
    $errors = [];
//    账号验证
    if (empty($username_post)){
        $errors[]='用户名不得为空！';
    }else{
        $username = mysqli_real_escape_string($mysql,trim($username_post));
    }
//密码验证
    if (empty($password_post)){
        $errors[]='密码不得为空！';
    }else{
        $password = mysqli_real_escape_string($mysql,trim($password_post));
    }
    if (empty($errors)){
        $sql= "select `id`,`name` from `xy_user` where `username` = '$username' and `password` = '$password'";
        $res = mysqli_query($mysql,$sql);
        if(mysqli_num_rows($res)==1){
            $row = mysqli_fetch_array($res,MYSQLI_ASSOC);
            return [true,$row];
        }else{
            $errors[]='账号或密码错误';
        }

    }
    return [false,$errors];
}
?>

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index.php实例

login.php实例

login_page.php实例

loginout.php实例

实例

footer.php实例

mysql.php实例

实例