登录页面
login.html 负责收集用户填写的登录信息
<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>
登录处理
login.php 负责处理用户登录与退出动作。
<?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;}?>
用户中心
my.php 是用户中心,作为用户登录检测。
<?phpsession_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 />';?>
conn.php,用于连接数据库
<?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");?>
原文地址:/php%E9%AA%8C%E8%AF%81%E7%99%BB%E5%BD%95%E7%94%A8%E6%88%B7%E5%90%8D%E5%92%8C%E5%AF%86%E7%A0%81.html