Question

当我输入用户名和密码时，我正在构建一个简单的用户登录页面，似乎没有任何反应，

这是我的html代码以及一些CSS，而我的php代码在此代码下方：

<!DOCTYPE html>
<html lang="en">


  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" 
content="width=device-width, initial-scale=1, shrink-to-fit=no">


    <!-- Bootstrap CSS -->
     <link rel="stylesheet" href="/css/bootstrap.min.css">

    <title>Intacs Login</title>
    <!-- inner css -->
        <style>  
          #login_logo {
              margin: 15px 10px 10px 0;
              display: block;

            margin-left: auto;
            margin-right: auto;

          }  
          .container{
              background-color: white;
              border-radius: 30px;
              border-color: lightgray;
              border-style:outset;
              width: 320px;
              margin-top: 30px;
              margin:auto;
              padding-top: 50px;
              padding-bottom: 50px;






      }

          #login_table{
              margin-top: auto;
              margin-left: auto;
              margin-right: auto;
          }
          #login_remember{

              text-align: center;
          }


        </style>

  </head>
  <body>


    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="/js/jquery-3.3.1.slim.min.js"></script>
    <script src="/js/popper.min.js"></script>
    <script src="/js/bootstrap.min.js"></script>
        <!-- HTML code -->
    <div class="container">
        <div id="login_form">
            <div id="login_block">
            <img id="login_logo" src="img/Intacs Master Logo.jpg" 
             width="187" height="63"> <!--div container-->
        </div>
    </div>

   <table id="login_table" cellspacing="1" cellpadding="3" border="0">
        <tbody>
            <tr>
                <form method="post" action="connect.php"> <!--form to connect to php file called connect.php -->
                <th>Username:&nbsp;</th>
                <td>
                    <input type="text" name="username" id="usernamefield" class="loginfield" validate="/^[a-z0-9_]{2,}$/i" valmsg="Please enter a valid username." value="" size="14" maxlength="32">   
                </td>
            </tr>
            <tr>
                <th>Password:&nbsp;</th>
                <td nowrap="nowrap">
                    <input type="password" name="password" 
       id="passwordfield" class="loginfield" validate="/^[^\s]{4,}$/" 
          valmsg="Please enter a valid password." value="" size="14" 
              maxlength="32">
                </td>

                </form>
            </tr>
        </tbody>
   </table>
   <div id="login_remember"><input type="checkbox" name="remember" value="1"> Remember me</div>
   <br />
   <center><input type="submit" value="Submit"></center>
  </body>

</html>

<?php
function Db() {
    $host = "localhost:8888";
    $username = "root";
    $password = "";
    $db = "intacslogin";
    $conn = new mysqli($host, $username, $password, $db);

    if(!$conn){
        die("Could not connect");
    }
}

if(isset($_POST['login'])){
    $uid = trim ($_POST['username']);
    $pwd = trim($_POST['password']);

    if($uid ==""){
        $err[] = "Username is missing";
    } else if($pwd == ""){
        $err[] = "Password is missing";
    } else{
        $db = Db();
        $uid = $db->real_escape_string($uid);
        $pwd = $db->real_escape_string($pwd);
        $sql = "SELECT * FROM users
        WHERE username = '$uid'
        and password = '$pwd'";
        $result = $db->query($sql);


    }
}

?>

请帮助谢谢，并祝您编程愉快。这是一个小型个人项目

Answer 1

<?php
//THIS FUNCTION SHOULD RETURN A CONNECTION TO BE USED IN A QUERY
function Db() {
    $host = "localhost:8888";
    $username = "root";
    $password = "";
    $db = "intacslogin";
//MAKE SURE U CONFIRM A SUCCESSFULL CONNECTION LIKE SO
    if ($conn = new mysqli($host, $username, $password, $db)) {
    return $conn;
}else {
return false;
}


    //if(!$conn){
      //  die("Could not connect");
    //}
}

if(isset($_POST['login'])){
    $uid = trim ($_POST['username']);
    $pwd = trim($_POST['password']);

    if($uid ==""){
        $err[] = "Username is missing";
    } else if($pwd == ""){
        $err[] = "Password is missing";
    } else{

    if (!$conn) {
        //you can die() becouse it returned false  
    }else {
        //proced when we a valid connection
        //dont use $db use $conn
        $uid = $conn->real_escape_string($uid);
        $pwd = $conn->real_escape_string($pwd);
        $sql = "SELECT * FROM users
        WHERE username = '$uid'
        and password = '$pwd'";

        $result = $conn->query($sql); 
}


    }
}

?>

用phpmyadmin连接php

1 个答案: