时间:2021-07-01 10:21:17 帮助过:20人阅读
登录页面 login.html
<html> <head>用户登录</head> <form name="LoginForm" method="post" action="login.php" onSubmit="return InputCheck(this)"> <p> <label for="username" class="label">用户名:</label> <input id="username" name="username" type="text" class="input" /> <p/> <p> <label for="password" class="label">密 码:</label> <input id="password" name="password" type="password" class="input" /> <p/> <p> <input type="submit" name="submit" value=" 确 定 " class="left" /> </p> </form> </html>
登录验证、注销登录 login.php
<?php //登录 if(!isset($_POST['submit'])){ exit('非法访问!'); } $username = htmlspecialchars($_POST['username']); $password = MD5($_POST['password']); //包含数据库连接文件 include('conn.php'); //检测用户名及密码是否正确 $check_query = mysql_query("select userid from user_list where username='$username' and password='$password' limit 1"); if($result = mysql_fetch_array($check_query)){ //登录成功 session_start(); $_SESSION['username'] = $username; $_SESSION['userid'] = $result['userid']; echo $username,' 欢迎你!进入 <a href="my.php">用户中心</a><br />'; echo '点击此处 <a href="login.php?action=logout">注销</a> 登录!<br />'; exit; } else { exit('登录失败!点击此处 <a href="javascript:history.back(-1);">返回</a> 重试'); } //注销登录 if($_GET['action'] == "logout"){ unset($_SESSION['userid']); unset($_SESSION['username']); echo '注销登录成功!点击此处 <a href="login.html">登录</a>'; exit; } ?>
登录监测 my.php
<?php session_start(); //检测是否登录,若没登录则转向登录界面 if(!isset($_SESSION['userid'])){ header("Location:login.html"); exit(); } //包含数据库连接文件 include('conn.php'); $userid = $_SESSION['userid']; $username = $_SESSION['username']; $user_query = mysql_query("select * from user_list where userid = '$userid' limit 1"); $row = mysql_fetch_array($user_query); echo '用户信息:<br />'; echo '用户ID:',$userid,'<br />'; echo '用户名:',$username,'<br />'; echo '<a href="login.php?action=logout">注销</a> 登录<br />'; ?>
连接数据库 conn.php
<?php $conn = mysql_connect("127.0.0.1","root","") or die("数据库链接错误".mysql_error()); mysql_select_db("info_db",$conn) or die("数据库访问错误".mysql_error()); mysql_query("set names gb2312"); ?>
相关推荐:
如何使用PHP实现单点登录的方法分析
利用php实现简单的后台注册登录(附代码)
以上就是如何利用PHP进行用户名和密码的验证(代码)的详细内容,更多请关注Gxl网其它相关文章!