界面
<!doctype html> <html lang="en"> <head> <!-- Required meta tags --> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <!-- Bootstrap CSS --> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous"> <title>登陆</title> <style> .mlmax{ max-width: 500px; align-content: center; margin: auto; margin-top:30px; } </style> </head> <body> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/js/bootstrap.bundle.min.js" integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW" crossorigin="anonymous"></script> <!-- 主要界面--> <!-- 表单--> <div class="mlmax border border-dark"> <form class="mb g-3" method="POST" action="login.php" enctype="multipart/form-data" id="bd"> <div class="card-header" align="center"> <kbd>登陆</kbd> <small> | </small> 注册 </div> <div class="card-body"> <div class="col-auto"> <label for="usr" class="visually-hidden">账号</label> <input type="text" class="form-control" id="usr" placeholder="UserName" name="username"> </div> <br> <div class="col-auto"> <label for="pwd" class="visually-hidden">密码</label> <input type="password" class="form-control" id="pwd" placeholder="PassWord" name="password"> </div> <br> <div class="col-auto" align="center"> <button type="submit" class="btn btn-primary mb-3" id="bt_dl">登陆</button> </div> </div><!--卡片内容结束--> <div class="card-footer" align="center"><small>技术支持：萌狼工作室</small></div> </form> </div> <!--JavaScript--> <!--隐藏的提示框--> <!--注册新增按钮的事件--> <script> </script> </body> </html>
连接数据库.php
<?php // <!--连接数据库--> $db=new mysqli("localhost","数据库名称","数据库密码"); // 检查连接，如果连接发生错误，则退出脚本 if($db -> connect_errno){ exit("数据库连接失败"); } else{ mysql_select_db($db); } ?>
登录验证.php
<?php include('connect.php');//连接数据库 // require_once 'connect.php'; session_start(); //获取表单内容 $name=$_POST['username']; $pwd=$_POST["password"]; // 判断 if (empty($name)) {//判断用户名是否为空 echo "<script>alert('请输入用户名');location='login.html'</script>"; }else if(empty($pwd)) {//判断用户密码是否为空 echo " <script>alert('请输入密码');location='login.html'</script> "; }else{ // $sql = "select username,password from admin where username='$name' and password='$pwd'"; // SQL 语句 $sql = "select username,password from admin where username='mllt9920' and password='qq2686485465'"; // 执行查询 $result=$db->query($sql); echo "result".$result; // if(mysqli_num_rows($result)=1){ // setcookie ( "username", $name, time () + 3600 * 24 * 365 ); // echo "<script>alert('登录成功');location='index.php'</script>"; // }else{ // echo "<script>alert('密码错误，请重新输入');location='login.html'</script>"; // } // $result = mysqli_query($db,$sql); // 执行上面的 SQL 语句 // echo "name:".$name."<br>"; // echo "pwd:".$pwd."<br>"; // echo "sql:".$sql."<br>"; // echo "result:".$result."<br>"; // $row=mysqli_num_rows($result);//获取返回的结果行数 //下面四行是过程测试代码 // if(!$row){//如果返回结果为0行,则不存在,即是错误 // echo "<script>alert('密码错误，请重新输入');location='login.html'</script>"; // } // else{ // setcookie ( "username", $name, time () + 3600 * 24 * 365 ); // echo "<script>alert('登录成功');location='index.php'</script>"; // }; // } } ?>
