login.html 負責收集用戶填寫的登錄信息
<html>
<head>
<title></title>
</head>
<body>
<fieldset>
<legend>用戶登錄</legend>
<form name="LoginForm" method="post" action="login.php" onSubmit="return InputCheck(this)">
<p>
<label for="username" class="label">用戶名:</label>
<input id="username" name="username" type="text" class="input" />
<p/>
<p>
<label for="password" class="label">密碼:</label>
<input id="password" name="password" type="password" class="input" />
<p/>
<p>
<input type="submit" name="submit" value="確定" class="left" />
</p>
</form>
</fieldset>
</body>
</html>登錄處理login.php 負責處理用戶登錄與退出動作
<?php
header("Content-Type:text/html;charset=utf-8");
if(!isset($_POST['submit'])){
exit('非法訪問!');
}
$username = htmlspecialchars($_POST['username']);
$password = MD5($_POST['password']);
//包含數據庫連接文件
include('conn.php');
//檢測用戶名及密碼是否正確
$check_query = mysql_query("select uid from user where username='$username' and password='$password' limit 1");
if($result = mysql_fetch_array($check_query)){
//登錄成功
$_SESSION['username'] = $username;
echo $username,' 歡迎你！進入 <a href="my.php">用戶中心</a><br />';
echo '點擊此處 <a href="login.php?action=logout">註銷</a> 登錄！<br />';
exit;
} else {
exit('登錄失敗！點擊此處 <a href="javascript:history.back(-1);">返回</a> 重試');
}
退出處理處理用戶退出的代碼跟處理登錄的代碼都在 login.php 裏。 session_start();
//註銷登錄
if($_GET['action'] == "logout"){
unset($_SESSION['username']);
echo '註銷登錄成功！點擊此處 <a href="login.html">登錄</a>';
exit;
}
?>my.php
<?php
header("Content-Type:text/html;charset=utf-8");
session_start();
//檢測是否登錄，若沒登錄則轉向登錄界面
if(!isset($_SESSION['userid'])){
header("Location:login.html");
exit();
}
//包含數據庫連接文件
include('conn.php');
$userid = $_SESSION['userid'];
$username = $_SESSION['username'];
$user_query = mysql_query("select * from user where uid=$userid limit 1");
$row = mysql_fetch_array($user_query);
echo '用戶信息：<br />';
echo '用戶ID：'.$userid.'<br />';
echo '用戶名：'.$username.'<br />';
echo '<a href="login.php?action=logout">註銷</a> 登錄<br />';
?>