<!-- html -->
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8" /> 5 <title>Document</title> 6 </head> 7 <body> 8 <form action="check.php" method="post"> 9 <p> 10 <input type="text" name="username" value="用户名"> 11 </p> 12 <p> 13 <input type="password" name="pwd" value="密码" placeholder="密码"> 14 </p> 15 <p> 16 <input type="submit"> 17 </p> 18 </form> 19 </body> 20 </html>
<!-- php -->
1 <?php 2 $username = $_POST['username']; 3 $password = $_POST['pwd']; 4 5 $link = mysqli_connect('localhost:3308', 'root', '123456', 'mytest1'); 6 mysqli_set_charset($link, 'utf8'); 7 8 $result = mysqli_query($link, "SELECT * FROM userinfo WHERE username='{$username}' AND password='{$password}'"); 9 $num = mysqli_num_rows($result); // 通过result的长度(数量0or1) 来判断是否有查到数据 10 // print_r($result); 11 $row = mysqli_fetch_array($result); //fetch数据，以便查找需要的具体信息 12 if($num == 1){ 13 echo "您已经成功登陆，"; 14 echo ($row['isvip'])?'我们敬爱的会员！': '你好！'; 15 }else { 16 print_r('用户名或密码错误'); 17 } 18 ?>