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Teacher's comments：
Collection
Collection
1 , 编程: cookie实现用户登录与验证
<?php
$page_title = '我是首页';
include 'mom/header.php';
echo '<h2 style="color: red">我是首页</h2>';
if (isset($_COOKIE['id']) && basename($_SERVER['PHP_SELF']) != 'logout.php'){
echo '<a href="logout.php">退出</a>';
}else{
echo '<a href="login.php">登录</a>';
}
include 'mom/footer.php';点击 "运行实例" 按钮查看在线实例
<?php
$page_title = '用户登录';
include 'mom/header.php';
if (isset($errors) && !empty($errors)){
$errors_msg = '<p style="color:red;">';
foreach ($errors as $msg){
$errors_msg .= $msg .'<br>';
}echo $errors_msg .'</p>';
}
?>
<h2 style="color: red;">用户登录</h2>
<form action="login.php" method="post">
<p>
<lable for="email">邮箱</lable>
<input type="email" name="email" id="email"
value="<?php echo isset($_POST['email']) ? $_POST['email'] :'' ?>">
</p>
<p>
<lable for="password">密码</lable>
<input type="password" name="password" id="password"
value="<?php echo isset($_POST['password']) ? $_POST['password'] :'' ?>">
</p>
<p>
<button type="submit" name="submit" id="submit">登录</button>
</p>
</form>
<?php include 'mom/footer.php'?><?php
if ($_SERVER['REQUEST_METHOD'] == 'POST'){
require 'mom/function.php';
require 'mom/mysql.php';
list($check,$data) = check_login($dbs,$_POST['email'],$_POST['password']);
if ($check){
// 开始设置cookie
setcookie('id',$data['id']);
setcookie('name',$data['name']);
// 设置跳转
redirect_user('loggedin.php');
}else{
$errors = $data;
}mysqli_close($dbs);
}
include 'login_page.php';<?php
if (!isset($_COOKIE['id'])){
require 'mom/function.php';
redirect_user();
}
$page_title = '登录成功';
include 'mom/header.php';
echo <<< "WELCOME"
<h2 style="color: red;">登录成功</h2>
<p>欢迎您:亲爱的{$_COOKIE['name']}</p>
<p><a href="logout.php">退出</a></p>
WELCOME;
include 'mom/footer.php';<?php
if (!isset($_COOKIE['id'])){
require 'mom/function.php';
redirect_user();
}else{
setcookie('id','',time()-3600);
setcookie('name','',time()-3600);
}
$page_title = '退出成功';
include 'mom/header.php';
echo <<< "WELCOME"
<h2 style="color: red;">退出成功</h2>
<p><a href="login.php">登录</a></p>
WELCOME;
include 'mom/footer.php';<!doctype html> <html> <head> <meta charset="UTF-8"> <title> <?php echo isset($page_title) ? $page_title : '默认标题'; ?> </title> </head> <body> <h1>我是你们的头部</h1>
<h1>我是你们的底部</h1> </body> </html>
<?php
$dbs = mysqli_connect('127.0.0.1','root','root','php');
if (mysqli_connect_errno()){
die('连接失败'.mysqli_connect_error());
}<?php
function check_login($dbs,$email='',$password){
$errors = [];
if (empty($email)){
$errors[] = '邮箱不能为空';
}else{
$e = mysqli_escape_string($dbs,trim($email));
}
if (empty($password)){
$errors[] = '密码不能为空';
}else{
$p = mysqli_escape_string($dbs,trim($password));
}
if (empty($errors)){
$sql = "SELECT `id`,`name` FROM `user` WHERE `email`= '$e 'AND `password`= sha1('$p')";
// die($sql);
$res = mysqli_query($dbs,$sql);
// var_dump($res);die;
// echo mysqli_num_rows($res);die;
if (mysqli_num_rows($res) == 1){
$row = mysqli_fetch_array($res,MYSQLI_ASSOC);
// print_r($row);die;
return [true,$row];
}else{
$errors[] = '邮箱或密码不正确,请重新输入';
}return [false,$errors];
}
}
function redirect_user($page = 'index.php'){
$url = 'http://'.$_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']);
$url = rtrim($url,'/\\');
$url.= '/'.$page;
header('location:'.$url);
exit();
}2 , 编程: session实现用户登录与验证
以下添加需要更改为session回话的页面 :
<?php
session_start();
$page_title = '我是首页';
include 'mom/header.php';
echo '<h2 style="color: red">我是首页</h2>';
if (isset($_SESSION['id']) && basename($_SERVER['PHP_SELF']) != 'logout.php'){
echo '<a href="logout.php">退出</a>';
}else{
echo '<a href="login.php">登录</a>';
}
include 'mom/footer.php';<?php
session_start();
if ($_SERVER['REQUEST_METHOD'] == 'POST'){
require 'mom/function.php';
require 'mom/mysql.php';
list($check,$data) = check_login($dbs,$_POST['email'],$_POST['password']);
if ($check){
// 开始设置cookie
// setcookie('id',$data['id']);
// setcookie('name',$data['name']);
// 设置session
$_SESSION['id'] = $data['id'];
$_SESSION['name'] = $data['name'];
// 设置跳转
redirect_user('loggedin.php');
}else{
$errors = $data;
}mysqli_close($dbs);
}
include 'login_page.php';<?php
session_start();
if (!isset($_SESSION['id'])){
require 'mom/function.php';
redirect_user();
}
$page_title = '登录成功';
include 'mom/header.php';
echo <<< "WELCOME"
<h2 style="color: red;">登录成功</h2>
<p>欢迎您:亲爱的{$_SESSION['name']}</p>
<p><a href="logout.php">退出</a></p>
WELCOME;
include 'mom/footer.php';<?php
session_start();
if (!isset($_SESSION['id'])){
require 'mom/function.php';
redirect_user();
}else{
// setcookie('id','',time()-3600);
// setcookie('name','',time()-3600);
session_destroy();
setcookie('PHPSESSION','',time()-3600);
}
$page_title = '退出成功';
include 'mom/header.php';
echo <<< "WELCOME"
<h2 style="color: red;">退出成功</h2>
<p><a href="login.php">登录</a></p>
WELCOME;
include 'mom/footer.php';3 , 手写: cookie与session会话机制的优缺点分析
回答 : session会话机制相比较cookie会话机制而言更加安全 , 因为session是储存在服务器中 ;
所以除却安全性之外 , 还更加的易于操作和管理 !