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How to send verification email when user logs in in PHP

PHPz

Sep 26, 2023 pm 03:41 PM

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How to send verification email when user logs in in PHP

How to send verification emails when users log in in PHP

Sending verification emails when users log in is one of the commonly used functions in website development. It can improve user accounts. safety and reliability. This article will introduce how to send verification emails when users log in in PHP, and provide corresponding code examples.

The steps to implement sending verification emails when users log in are as follows:

Step 1: Set up the database

First, we need to set up a database to store user-related information. Including user name, password and email address, etc. Here we assume that there is already a data table named "users", which contains the following fields: id (self-increasing primary key), username, password and email.

Step 2: Write the registration page

When users register on the website, they need to fill in information such as user name, password, and email address. The HTML code example of the registration page is as follows:

<!DOCTYPE html>
<html>
<head>
    <title>用户注册</title>
</head>
<body>
    <form action="register.php" method="POST">
        <label for="username">用户名：</label>
        <input type="text" id="username" name="username" required><br><br>
        
        <label for="password">密码：</label>
        <input type="password" id="password" name="password" required><br><br>
        
        <label for="email">邮箱：</label>
        <input type="email" id="email" name="email" required><br><br>
        
        <input type="submit" value="注册">
    </form>
</body>
</html>

Step 3: Write the registration processing page

After the user submits the registration information, we need to write a processing page to save the user information to the database , and send a verification email. The code example of register.php is as follows:

<?php
// 连接数据库
$conn = mysqli_connect("localhost", "root", "password", "database");

if (!$conn) {
  die("连接数据库失败：" . mysqli_connect_error());
}

// 获取用户提交的注册信息
$username = $_POST['username'];
$password = $_POST['password'];
$email = $_POST['email'];

// 生成随机验证码
$verification_code = md5(uniqid(rand(), true));

// 将用户信息保存到数据库
$sql = "INSERT INTO users (username, password, email, verification_code) VALUES ('$username', '$password', '$email', '$verification_code')";

if (mysqli_query($conn, $sql)) {
  // 发送验证邮件
  $to = $email;
  $subject = "账号激活";
  $message = "请点击以下链接激活账号：

";
  $message .= "http://www.example.com/activate.php?code=$verification_code";
  $headers = "From: admin@example.com";

  mail($to, $subject, $message, $headers);

  echo "注册成功，请查收邮件进行账号激活。";
} else {
  echo "注册失败：" . mysqli_error($conn);
}

mysqli_close($conn);
?>

Step 4: Write the account activation page

After the user clicks the link in the verification email, he needs to jump to an account activation page to complete the account activation . The code example of activate.php is as follows:

<?php
// 连接数据库
$conn = mysqli_connect("localhost", "root", "password", "database");

if (!$conn) {
  die("连接数据库失败：" . mysqli_connect_error());
}

// 获取验证码
$verification_code = $_GET['code'];

// 更新用户状态为已激活
$sql = "UPDATE users SET status = 1 WHERE verification_code = '$verification_code'";

if (mysqli_query($conn, $sql)) {
  echo "账号激活成功，请登录。";
} else {
  echo "账号激活失败：" . mysqli_error($conn);
}

mysqli_close($conn);
?>

Through the above steps, we can send a verification email when the user registers, and complete the account activation by the user clicking the verification link.

It should be noted that in actual applications, we also need to add relevant security verification measures, such as preventing malicious registration, verification code verification, etc. These measures can further improve the security of user accounts.

It should be reminded that since sending emails involves the server’s email configuration, the email sending code in the above example may not run properly in all environments. If you encounter problems, it is recommended to consult the relevant documentation or consult the server administrator.

The above is the detailed content of How to send verification email when user logs in in PHP. For more information, please follow other related articles on the PHP Chinese website!

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