一、cookie会话会员登陆验证
<?php //公共头部 $page_title="网站首页"; include 'inc/header.php'; echo '<h3 style="color:goldenrod;"> 首页</h3>'; //判定用户登陆 if (isset($_COOKIE['id']) && $_SERVER['PHP_SELF'] != 'logout.php'){ echo '<a href="logout.php">退出</a>'; echo basename($_SERVER['PHP_SELF']); }else { echo '<a href="login.php">登陆</a>'; } //导入页面的公共底部 include 'inc/footer.php';
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<?php if($_SERVER['REQUEST_METHOD'] == 'POST'){ //加载函数库 require 'inc/function.php'; //链接数据库 require 'inc/conncet.php'; //验证登陆 list($check, $data) = check_login($dbc,$_POST['email'],$_POST['password']); //检测是否通过验证 if($check) { //设置cookie setcookie('id',$data['id']); setcookie('name',$data['name']); //跳转 redirect_user('loggedin.php'); }else{ $errors = $data; } //关闭 mysqli_close($dbc); } include "login_page.php"; ?>
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<?php $page_title="用户登陆"; include "inc/header.php"; //错误提示 if (isset($errors) && !empty($errors)){ $errors_msg = '<p style="color: red">'; foreach ($errors as $msg) { $errors_msg .=$msg .'<br>'; } echo $errors_msg.'</p>'; } ?> <h2 style="color:#ff00ff">用户登陆</h2> <form action="login.php" method="post"> <p> <label for="email">邮箱:</label> <input type="email" name="email" id="email" value="<?php echo isset($_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']) ? $_POST['password'] : '';?>"> </p> <p> <button type="submit" name="submit" id="submit">登陆</button> </p> </form> <?php include "inc/footer.php"; ?>
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<?php //登陆成功页 if(!isset($_COOKIE['id'])) { require_once 'inc/function.php'; redirect_user(); } $page_title='登陆成功'; include 'inc/header.php'; //heredoc echo <<<"EILCOME" <h2 style="color: #0388f1">登陆成功</h2> <p>hello {$_COOKIE['name']}</p> <a href="logout.php">退出</a> EILCOME; include 'inc/footer.php';
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<?php //退出登陆 页 if(!isset($_COOKIE['id'])) { require_once 'inc/function.php'; redirect_user(); }else{ //退出登陆,删除cookie setcookie('id','',time()-3600); setcookie('name','',time()-3600); } $page_title='登陆成功'; include 'inc/header.php'; //heredoc echo <<<"EILCOME" <h2 style="color: #0388f1">退出成功</h2> <a href="login.php">登陆</a> EILCOME; include 'inc/footer.php';
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1.数据库连接 conncet.php 页面主要实现数据库连接和检测 <?php //链接数据库 $dbc = mysqli_connect('127.0.0.1','root','admin','php'); //判断连接是否成功 if(mysqli_connect_errno()){ die('连接失败'.mysqli_connect_error()); } 2.会员登陆所用的公共函数文件function.php <?php /**公共函数库 */ //用户登陆成功后的跳转 function redirect_user($page='index.php'){ //默认url $url = 'http://'.$_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']); //去掉URL右侧的斜线 $url = rtrim($url,'/\\'); // windows \ linux mac / //i增加当前脚本名称 $url .= '/'.$page; //跳转到指定的地址 header('Location:'.$url); exit(); } function check_login($dbc, $email='', $password) { // print_r($_POST); //初始一个保存错误信息的数组 $error = []; // 非空难验证 if (empty($email)) { $errors[] = '邮箱不能为空'; }else{ $e = mysqli_real_escape_string($dbc,trim($email)); //mysqli_real_escape_string 特殊字符转义 trim 清除空格 } if (empty($password)) { $errors[] = '密码不能为空'; }else{ $p = mysqli_real_escape_string($dbc,trim($password)); //mysqli_real_escape_string 特殊字符转义 trim 清除空格 } //到表中进行数据验证 if(empty($errors)) { // 根据邮箱和密码进行验证,并返回ID,NAME $sql = "SELECT `id`,`name` FROM `user` WHERE `email`='$e' AND `password`=sha1('$p')"; $res=mysqli_query($dbc,$sql); if(mysqli_num_rows($res) == 1){ $row=mysqli_fetch_array($res,MYSQLI_ASSOC); //返回查询结果 return [true, $row]; }else{ $errors[] = '邮箱或密码不对'; } } return [false, $errors]; } 3.公共头部header.php <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title><?php isset($page_title) ? $page_title : '默认标题'; ?></title> </head> <body> <h2 style="color: #0388f1 ">我是公共头部</h2> 4.公共尾部footer.php <h2 style="color: #0388f1">我是公共尾部</h2> </body> </html>
二、session会话 会员登陆验证
<?php session_start();//开启session会话 //公共头部 $page_title="网站首页"; include 'inc/header.php'; echo '<h3 style="color:goldenrod;"> 首页</h3>'; //判定用户登陆 if (isset($_SESSION['id']) && $_SERVER['PHP_SELF'] != 'logout.php'){ echo '<a href="logout.php">退出</a>'; //echo basename($_SERVER['PHP_SELF']); }else { echo '<a href="login.php">登陆</a>'; } //导入页面的公共底部 include 'inc/footer.php';
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<?php session_start(); //登陆成功页 if(!isset($_SESSION['id'])) { require_once 'inc/function.php'; redirect_user(); } $page_title='登陆成功'; include 'inc/header.php'; //heredoc echo <<<"EILCOME" <h2 style="color: #0388f1">登陆成功</h2> <p>hello {$_SESSION['name']}</p> <a href="logout.php">退出</a> EILCOME; include 'inc/footer.php';
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<?php session_start(); if($_SERVER['REQUEST_METHOD'] == 'POST'){ //加载函数库 require 'inc/function.php'; //链接数据库 require 'inc/conncet.php'; //验证登陆 list($check, $data) = check_login($dbc,$_POST['email'],$_POST['password']); //检测是否通过验证 if($check) { //设置session $_SESSION['id']=$data['id']; $_SESSION['name']=$data['name']; //跳转 redirect_user('loggedin.php'); }else{ $errors = $data; } //关闭 mysqli_close($dbc); } include "login_page.php"; ?>
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<?php $page_title="用户登陆"; include "inc/header.php"; //错误提示 if (isset($errors) && !empty($errors)){ $errors_msg = '<p style="color: red">'; foreach ($errors as $msg) { $errors_msg .=$msg .'<br>'; } echo $errors_msg.'</p>'; } ?> <h2 style="color:#ff00ff">用户登陆</h2> <form action="login.php" method="post"> <p> <label for="email">邮箱:</label> <input type="email" name="email" id="email" value="<?php echo isset($_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']) ? $_POST['password'] : '';?>"> </p> <p> <button type="submit" name="submit" id="submit">登陆</button> </p> </form> <?php include "inc/footer.php"; ?>
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<?php //退出登陆 页 session_start(); if(!isset($_SESSION['id'])) { require_once 'inc/function.php'; redirect_user(); }else{ //退出登陆,删除session // setcookie('id','',time()-3600); // setcookie('name','',time()-3600); session_destroy(); setcookie('PHPSESSID','',time()-3600); } $page_title='退出成功'; include 'inc/header.php'; //heredoc echo <<<"EILCOME" <h2 style="color: #0388f1">退出成功</h2> <a href="login.php">登陆</a> EILCOME; include 'inc/footer.php';
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1.connect.php 数据库连接页 <?php //链接数据库 $dbc = mysqli_connect('127.0.0.1','root','admin','php'); //判断连接是否成功 if(mysqli_connect_errno()){ die('连接失败'.mysqli_connect_error()); } <?php /**公共函数库 */ //用户登陆成功后的跳转 function redirect_user($page='index.php'){ //默认url $url = 'http://'.$_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']); //去掉URL右侧的斜线 $url = rtrim($url,'/\\'); // windows \ linux mac / //i增加当前脚本名称 $url .= '/'.$page; //跳转到指定的地址 header('Location:'.$url); exit(); } function check_login($dbc, $email='', $password) { // print_r($_POST); //初始一个保存错误信息的数组 $error = []; // 非空难验证 if (empty($email)) { $errors[] = '邮箱不能为空'; }else{ $e = mysqli_real_escape_string($dbc,trim($email)); //mysqli_real_escape_string 特殊字符转义 trim 清除空格 } if (empty($password)) { $errors[] = '密码不能为空'; }else{ $p = mysqli_real_escape_string($dbc,trim($password)); //mysqli_real_escape_string 特殊字符转义 trim 清除空格 } //到表中进行数据验证 if(empty($errors)) { // 根据邮箱和密码进行验证,并返回ID,NAME $sql = "SELECT `id`,`name` FROM `user` WHERE `email`='$e' AND `password`=sha1('$p')"; $res=mysqli_query($dbc,$sql); if(mysqli_num_rows($res) == 1){ $row=mysqli_fetch_array($res,MYSQLI_ASSOC); //返回查询结果 return [true, $row]; }else{ $errors[] = '邮箱或密码不对'; } } return [false, $errors]; } <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title><?php isset($page_title) ? $page_title : '默认标题'; ?></title> </head> <body> <h2 style="color: #0388f1 ">我是公共头部</h2> <h2 style="color: #0388f1">我是公共尾部</h2> </body> </html>
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cookie和session会话优缺点
总结:会员登陆验证通过cookie和session都可以实现,cookie是保存在用户端,session保存在服务器端。
1.cookie如果没有设置有效期默认 页面关闭时当前的cookie就将结束,凡知如果设置了有效期则在不清空cookie的情况下,下次再打开会自动调用。
2.session是保存在服务器相比cookie更加安全一些,默认有效期是29分钟可以php.ini中修改过期时间和session的保存目录。