Question

这是我的数据库的快照：Postman link
db.php中

<?php
$con = mysqli_connect("localhost","root","","organisation");
// Check connection
if (mysqli_connect_errno())
  {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  }
?>

的login.php

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Login</title>
<link rel="stylesheet" href="css/style.css" />
</head>
<body>
<?php
require('db.php');
session_start();
// If form submitted, insert values into the database.
if (isset($_POST['username'])){
        // removes backslashes
    $username = stripslashes($_REQUEST['username']);
        //escapes special characters in a string
    $username = mysqli_real_escape_string($con,$username);
    $password = stripslashes($_REQUEST['password']);
    $password = mysqli_real_escape_string($con,$password);
    //Checking is user existing in the database or not
        $query = "SELECT * FROM admin WHERE username='$username'and password='".md5($password)."'";
    $result = mysqli_query($con,$query) or die(mysql_error());
    $rows = mysqli_num_rows($result);
        if($rows==1){
        $_SESSION['username'] = $username;
            // Redirect user to index.php
        header("Location: index.php");
         }else{
    echo "<div class='form'>
<h3>Username/password is incorrect.</h3>
<br/>Click here to <a href='login.php'>Login</a></div>";
    }
    }else{
?>
<div class="form">
<h1>Log In</h1>
<form action="" method="post" name="login">
<input type="text" name="username" placeholder="Username" required />
<input type="password" name="password" placeholder="Password" required />
<input name="submit" type="submit" value="Login" />
</form>
</div>
<?php } ?>
</body>
</html>

我最好的猜测是$ rows返回false，因此我无法验证用户身份。我已经仔细检查了代码，但我似乎无法在数据库连接中发现任何错误。

Answer 1

$query = "SELECT * FROM admin WHERE username='".$username."'and password='".md5($password)."'";
    $result = mysqli_query($con,$query) or die(mysql_error());
    $rows = mysqli_num_rows($result);
        if($rows>=1){
        $_SESSION['username'] = $username;
            // Redirect user to index.php
        header("Location: index.php"); exit();

php：无法验证用户登录

1 个答案: