<?php
if(isset($_POST['name'])||isset($_POST['pass'])){
//如果有表单有提交
//检测表单中需要的值
if(empty($_POST['name'])){
die("请输入用户名!");
}
if(empty($_POST['pass'])){
die("请输入暗码!");
}
//设置数据库变量
$host = "localhost";
$user = "root";
$pass = "zq19890319";
$db = "cookie";
//打开连接
$connection = mysql_connect($host, $user, $pass) or die("Unable to connect!");
//选择一个数据库
mysql_select_db($db) or die("Unable to select database!");
//建立一个查询
$query = "SELECT * FROM users WHERE name = '".$_POST['name']."' AND pass = SHA1('".$_POST['pass']."')";
//执行一个查询
$result = mysql_query($query) or die("Error in query:$query." . mysql_error());
//是否有记录集返回
if(mysql_num_rows($result) == 1){
//如果有一行记录返回
//表示验证已经通过
//建立一个session,设置一个登陆标记为1,并将当前用户名保存在cookie中
session_start();
$_SESSION['auth'] = 1;
setcookie("username", $_POST['name'], time()+(84600*30));
echo "用户访问已经授权!";
}else{
echo "错误的用户名或暗码!";
}
//释放记录集
mysql_free_result($result);
//关闭数据库
mysql_close($connection);
}
else{
//如果没有表单提交,则显示一个HTML表单
?>
<html>
<head></head>
<body>
<center>
<form method="post" action="">
用户名<input type="text" name="name" value="<?php echo $_COOKIE['username'];?>" />
<p />
暗码<input type="password" name="password" />
<p />
<input type="submit" name="submit" value="登陆" />
</form>
</center>
</body>
<?php
}
?>
