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