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PHP+MYSQL实现cookie/session验证(4月20日课程)2018/05/14
箭里飘香
Original
685 people have browsed it

目录结构如下:

QQ图片20180514153912.png

此案例中cookie与session代码大同小异,下面以session代码演示

index.php:

<?php
session_start();
$page_title = '首页';
//导入头部
include ('inc/header.php');

echo '<h2 style="color:red">首页</h2>';
//登录检测
if (isset($_SESSION['user_id']) && basename($_SERVER['PHP_SELF']) != 'logut.php') {
	echo '<a href="logout.php">退出登录</a>';
} else {
	echo '<a href="login.php">登录</a>';
}

//导入底部
include ('inc/footer.php');

login.php:


<?php 
/*
*登录页面
*/
$page_title = '用户登录';
//导入头部
include ('inc/header.php');

// echo '<h2 style="color:red">首页</h2>';


?>
<h2 style="color: red">用户登录</h2>
<form action="checklogin.php" method="post">
	<p>
		<label for="email">邮箱:
		<input type="email" name="email" id="email" value="">
		</label>
	</p>
	<p>
		<label for="password">邮箱:
		<input type="password" name="password" id="password" value="">
		</label>
	</p>
	<p>
		<button type="submit" name="submit" id="submit">登录</button>
	</p>
</form>
<?php 
//导入底部
include ('inc/footer.php');
 ?>

logout.php:


<?php
session_start();
if (!isset($_SESSION['user_id'])){
	require ('inc/function.php');
	redirect_user();
} else {
	// setcookie('user_id','',time()-3600);
	// setcookie('user_name','',time()-3600);
	$_SESSION = [];
	session_destroy();
	setcookie('PHPSESSID','',time()-3600);
}

$page_title = '退出成功';
//加载头部
include ('inc/header.php');
//打印欢迎信息
echo <<<"WELCOME"
<h2 style="color:red">退出成功</h2>

<p><a href="login.php">登录</a></p>

WELCOME;
//加载底部
include ('inc/footer.php');

checklogin.php


<?php
session_start();
if ($_SERVER['REQUEST_METHOD'] == 'POST'){
	//加载公共函数库
	require('inc/function.php');
	//连接数据库
	require ('inc/connect.php');
	//验证登录
	list($check,$data) = check_login($dbc, $_POST['email'],$_POST['password']);

	//验证通过
	if ($check) {
		//设置cookie
		
		// setcookie('user_id', $data['user_id']);
		// setcookie('user_name', $data['user_name']);
		$_SESSION['user_id'] = $data['user_id'];
		$_SESSION['user_name'] = $data['user_name'];
		
		//跳转成功页面
		redirect_user('loggedin.php');
	} else {
		$errors = $data;
	}
	//关闭连接
	mysqli_close($dbc);


}
//加载
include ('login.php');

loggedin.php:


<?php
session_start();
//用户未登录验证
if (!isset($_SESSION['user_id'])){
	require ('inc/function.php');
	redirect_user();
}
$page_title = '已登录';
//加载头部
include ('inc/header.php');
//打印欢迎信息
echo <<<"WELCOME"
<h2 style="color:red">登录成功</h2>
<p>欢迎您:{$_SESSION['user_name']}</p>
<p><a href="logout.php">退出登录</a></p>

WELCOME;
//加载底部
include ('inc/footer.php');


inc目录下文件

connect.php


<?php 
define('DB_HOST','localhost');
define('DB_USER','root');
define('DB_PASS','root');
define('DB_NAME','php');
define('DB_CHAR','utf8');

$dbc = @mysqli_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
if (mysqli_connect_errno($dbc)) {
	echo '连接失败'.mysqli_connect_error($dbc);
}
mysqli_select_db($dbc, DB_NAME);
mysqli_set_charset($dbc, DB_CHAR);

footer.php


<h3>公共底部</h3>
</body>
</html>

function.php


<?php 
//用户自定义跳转地址
function redirect_user($page='index.php')
{
	//默认地址
	$url = 'http://'.$_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']);
	//去掉右侧的/,\
	$url = rtrim($url, '/\\');
	//生成自定义跳转地址
	$url .= '/'.$page;
	//跳转自定义地址
	header('Location:'. $url);
	exit();
}
function check_login($dbc, $email='', $password='')
{
	//创建错误信息数组
	$errors = [];
	//验证邮箱
	if (empty($email)){
		$errors[] = '请输入邮箱';
	} else {
		$e = mysqli_real_escape_string($dbc,trim($email));
	}
	//验证密码
	if (empty($password)){
		$errors[] = '请输入密码';
	} else {
		$p = mysqli_real_escape_string($dbc,trim($password));
	}
	if (empty($errors)) {
		$sql = "SELECT `user_id`,`user_name` FROM `user` WHERE `email`='$e' AND `password`=sha1('$p')";
		$res = mysqli_query($dbc,$sql);
		if (mysqli_num_rows($res) == 1) {
			$rows = mysqli_fetch_array($res, MYSQLI_ASSOC);
			// echo '<pre>';
			// print_r($rows);die();
			return [true, $rows];
		} else {
			$errors[] = '邮箱或密码错误,请重新输入';
		}
	}
	return [false, $errors];
}

header.php


<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>
		<?php 
			echo isset($page_title) ? $page_title : '默认标题';
		 ?>
	</title>
</head>
<body>
	
<h3>公共头部</h3>


Correction status:Uncorrected

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