文件结构：
根目录下的文件：
index.php实例
<?php
$page_title='首页';
include('inc/header.php');
if ((isset($_COOKIE['id'])) && basename($_SERVER['PHP_SELF']) != 'loginout.php'){
echo '<a href="loginout.php">退出</a>';
}else{
echo '<a href="login.php">登录</a>';
}
include ('inc/footer.php');运行实例 »
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login.php实例
<?php
if ($_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';运行实例 »
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login_page.php实例
<?php
$page_title = '用户登录';
include 'inc/header.php';
?>
<div class="login">
<h3>会员登录</h3>
<form action="login.php" method="post">
<p>
<label for="username">账号：</label>
<input type="text" name="username" id="username">
</p>
<p>
<label for="password">密码：</label>
<input type="password" name="password" id="password">
</p>
<p>
<button type="submit" name="btn_login" id="btn_login">立即登录</button>
</p>
</form>
</div>
<?php
include ('inc/footer.php');
?>运行实例 »
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loginout.php实例
<?php
if (!isset($_COOKIE['id'])){
require 'inc/function.php';
jumpto('login.php');
}else{
setcookie('id','',time()-3600);
setcookie('name','',time()-3600);
}
$page_title='首页';
include('inc/header.php');
?>
<div class="main">
<?php
echo '<h1 style="color: #ff8bac;">退出成功</h1><a href="login.php">登录</a><br>';
?>
</div>
<?php
include ('inc/footer.php');
?>运行实例 »
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member.php
实例
<?php
if (!isset($_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');
?>运行实例 »
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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>运行实例 »
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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);运行实例 »
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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];
}
?>运行实例 »
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