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- //连接数据库
- <?php
- $hostname_conn="localhost";
- $username_conn="root";
- $password_conn="123456";
- $database_conn="joke";
- $link=mysqli_connect($hostname_conn,$username_conn,$password_conn,$database_conn) or trigger_error(mysql_error(),E_USER_ERROR);
- ?>
- //获取POST数据
- <?php
- $username=$_POST['username'];
- $password=$_POST['password'];
- ?>
- //从数据库中查询用户名与密码
- <?php
- $sql="select * from login where username='{$username}' and password = '{$password}'";
- $rs=mysqli_query($link,$sql);
- $rows=mysqli_fetch_array($rs);
- ?>
- //验证用户名与密码
- <?php
- if($row) {
- if ($username == $row['username'] && $password == $row['password'])
- {
- echo "登陆成功,正在为你跳转至后台页面";
- header("location:index.html");
- }
- }else{
- echo "账号或密码错误" . "<br/>";
- echo "<a href='login.html'>返回登陆页面</a>";
- }
- ?>
- //验证验证码
- <?php
- if(!$_POST['code'])
- {
- echo"验证码不能为空";
- return;
- }
- else if($_POST['code']!=$_SESSION['authcode'])
- {
- echo "验证码错误,请重新输入";
- return;
- }
- ?>
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