inc文件内容:
实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/2
* Time: 21:41
*/
//连接数据库
$dbc=mysqli_connect('127.0.0.1','root','','test');
//判断连接是否成功
if(mysqli_connect_errno()){
die('连接失败'.mysqli_connect_error());
}运行实例 »
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实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/2
* Time: 21:47
*/
//用户登录成功之后的跳转
function redirect_user($page='index.php'){
//默认的url
$url='http://'.$_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']);
//去掉url右边的斜线
$url=rtrim($url,'/\\');
//添加上当前的脚本名称
$url.='/'.$page;
//挑转到指定地址
header('Location:'.$url);
exit();
}
//验证用户登录
function check_login($dbc,$email='',$password){
//初始化一个保存错误信息的数组
$errors=[];
//非空验证
if(empty($email)){
$errors[]='邮箱不能为空';
}else{
$e = mysqli_real_escape_string($dbc,trim($email));
}
//非空验证
if(empty($password)){
$errors[]='密码不能为空';
}else{
$p = mysqli_real_escape_string($dbc,trim($password));
}
//到表中进行数据验证
if(empty($errors)){
//根据邮箱和密码进行验证,并返回id和name
$sql = "SELECT `id`,`name` FROM `user` WHERE `email`='$e' AND `passwd`=sha1('$p')";
//执行查询
$res=mysqli_query($dbc,$sql);
if(mysqli_num_rows($res) == 1){
//返回查询结果
$row=mysqli_fetch_array($res,MYSQLI_ASSOC);
return [true,$row];
}else{
$errors[]='邮箱或密码不正确,请重新输入';
}
return [false,$errors];
}
}运行实例 »
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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"> <title><?php echo isset($page_title)?$page_title:'默认标题'; ?></title> </head> <body> <h1>我是头部</h1>
运行实例 »
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cookie:
首页:
实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/2
* Time: 21:26
*/
//导入页面头部
$page_title='首页';
include 'inc/header.php';
echo '<h2>我是首页</h2>';
//判断用户是否登录
if(isset($_COOKIE['id']) && basename($_SERVER['PHP_SELF']) !='logout.php'){
echo '<a href="logout.php">退出</a>';
}else{
echo '<a href="login.php">登录</a>';
}
//导入页面尾部
include 'inc/footer.php';
?>运行实例 »
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登录页:
实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/2
* Time: 22:15
*/
if($_SERVER['REQUEST_METHOD'] == 'POST'){
//加载函数库
require 'inc/function.php';
//加载数据库
require 'inc/connect.php';
//登录验证
list($check,$data)=check_login($dbc,$_POST['email'],$_POST['password']);
//检测是否验证通过
if($check){
//$data['id']和$data['name']为 $row=mysqli_fetch_array($res,MYSQLI_ASSOC);的结果集
//设置cookie
setcookie('id',$data['id']);
setcookie('name',$data['name']);
//挑转
redirect_user('loggedin.php');
}else{
$errors=$data;
}
//关闭
mysqli_close($dbc);
}
include 'login_page.php';运行实例 »
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实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/3
* Time: 11:12
*/
$paga_title='用户登录';
include 'inc/header.php';
//错误信息显示
if(isset($errors) && !empty($errors)){
$errors_msg='<p style="color:red;">';
foreach ($errors as $msg){
$errors_msg.=$msg.'<br>';
}
echo $errors_msg.'</p>';
}
?>
<h2 style="color:red;">用户登录</h2>
<form action="login.php" method="POST">
<p><label for="email">邮箱:</label>
<input type="email" name="email" id="email" value="<?php echo isset($_POST['email'])? $_POST['email']:'' ?>">
</p>
<p>
<label for="password">密码:</label>
<input type="password" name="password" id="password" value="<?php echo isset($_POST['password'])? $_POST['password']:''?>">
</p>
<p>
<button type="submit" name="submit" id="submit">登录</button>
</p>
</form>
<?php
include 'inc/footer.php';
?>运行实例 »
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登录成功内容:
实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/3
* Time: 11:26
*/
//判断用户是否登录
if(!isset($_COOKIE['id'])){
require 'inc/function.php';
redirect_user();
}
$page_title='登录成功';
//导入公共头部
include 'inc/header.php';
//heredoc
echo <<<WELCOME
<h2 style="color:red;">登录成功</h2>
<p>欢迎您:亲爱的{$_COOKIE['name']}</p>
<p><a href="logout.php">退出</a></p>
WELCOME;
//导入公共底部
include 'inc/footer.php';运行实例 »
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退出登录页:
实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/3
* Time: 11:31
*/
//退出登录页面
//判断是否登录
if(!isset($_COOKIE['id'])){
require 'inc/function.php';
redirect_user();
}else{
//退出登录,删除cookie
setcookie('id','',time()-3600);
setcookie('name','',time()-3600);
}
$page_title='退出登录';
include 'inc/header.php';
echo <<<WELCOME
<h2 style="color:red;">退出成功</h2>
<p><a href="login.php">登录</a></p>
WELCOME;
include 'inc/footer.php';运行实例 »
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效果预览:
SESSION部分:
首页:
实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/2
* Time: 21:26
*/
session_start();
//导入页面头部
$page_title='首页';
include 'inc/header.php';
echo '<h2>我是首页</h2>';
//判断用户是否登录
if(isset($_SESSION['id']) && basename($_SERVER['PHP_SELF']) !='logout.php'){
echo '<a href="logout.php">退出</a>';
}else{
echo '<a href="login.php">登录</a>';
}
//导入页面尾部
include 'inc/footer.php';
?>运行实例 »
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登录页:
实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/2
* Time: 22:15
*/
session_start();
if($_SERVER['REQUEST_METHOD'] == 'POST'){
//加载函数库
require 'inc/function.php';
//加载数据库
require 'inc/connect.php';
//登录验证
list($check,$data)=check_login($dbc,$_POST['email'],$_POST['password']);
//检测是否验证通过
if($check){
//$data['id']和$data['name']为 $row=mysqli_fetch_array($res,MYSQLI_ASSOC);的结果集
//设置SESSION
$_SESSION['id']=$data['id'];
$_SESSION['name']=$data['name'];
//挑转
redirect_user('loggedin.php');
}else{
$errors=$data;
}
//关闭
mysqli_close($dbc);
}
include 'login_page.php';运行实例 »
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实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/3
* Time: 11:12
*/
$paga_title='用户登录';
include 'inc/header.php';
//错误信息显示
if(isset($errors) && !empty($errors)){
$errors_msg='<p style="color:red;">';
foreach ($errors as $msg){
$errors_msg.=$msg.'<br>';
}
echo $errors_msg.'</p>';
}
?>
<h2 style="color:red;">用户登录</h2>
<form action="login.php" method="POST">
<p><label for="email">邮箱:</label>
<input type="email" name="email" id="email" value="<?php echo isset($_POST['email'])? $_POST['email']:'' ?>">
</p>
<p>
<label for="password">密码:</label>
<input type="password" name="password" id="password" value="<?php echo isset($_POST['password'])? $_POST['password']:''?>">
</p>
<p>
<button type="submit" name="submit" id="submit">登录</button>
</p>
</form>
<?php
include 'inc/footer.php';
?>运行实例 »
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登录成功页:
实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/3
* Time: 11:26
*/
session_start();
//判断用户是否登录
if(!isset($_SESSION['id'])){
require 'inc/function.php';
redirect_user();
}
$page_title='登录成功';
//导入公共头部
include 'inc/header.php';
//heredoc
echo <<<WELCOME
<h2 style="color:red;">登录成功</h2>
<p>欢迎您:亲爱的{$_SESSION['name']}</p>
<p><a href="logout.php">退出</a></p>
WELCOME;
//导入公共底部
include 'inc/footer.php';运行实例 »
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退出登录页:
实例
<?php
/**
* Created by PhpStorm.
* User: 714326675
* Date: 2018/9/3
* Time: 11:31
*/
//退出登录页面
//启动会话
session_start();
//判断是否登录
if(!isset($_SESSION['id'])){
require 'inc/function.php';
redirect_user();
}else{
//退出登录,删除SESSION
// setcookie('id','',time()-3600);
//setcookie('name','',time()-3600);]
session_destroy();//服务器上的session信息消除
setcookie('PHPSESSION','',time()-3600);
}
$page_title='退出登录';
include 'inc/header.php';
echo <<<WELCOME
<h2 style="color:red;">退出成功</h2>
<p><a href="login.php">登录</a></p>
WELCOME;
include 'inc/footer.php';运行实例 »
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预览效果:
总结:
cookie:开启cookie:setcookie('名字','值');销毁cookie:setcookie('名字','值',time()-3600); -3600就是过期了一小时 +3600的话就是一小时后过期
session:开启session:session_start(); 销毁session:session_destroy();再把客-户端的cookie销毁:settcookie('名字','值',time()-3600);
