Learn how to implement the group management function of email sending in the website through PHP and PHPMAILER

Learn how to implement the group management function of email sending in the website through PHP and PHPMAILER

With the development of the Internet, email has become a main way for people to communicate. After completing the website development, we may need to implement the email sending function in the website to send various notifications, promotional information, etc. to users.

This article will use PHP and PHPMAILER to learn how to implement the group management function of email sending in the website. The group management function can divide users into different groups, making it easier for us to send emails by group.

First, we need to prepare a database table to store user information and group information. Assume that we have created a table named users. The table structure is as follows:

CREATE TABLE `users` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  `email` varchar(255) NOT NULL,
  `group_id` int(11) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Among them, the group_id field is used to indicate the group to which the user belongs.

Next, we need to write PHP code to implement the function of sending emails. First, we need to introduce the PHPMailer library, which can be installed by adding the phpmailer/phpmailer dependency to the project.

composer require phpmailer/phpmailer

Then, we can create a file named mail.php and write the following code:

<?php
require 'vendor/autoload.php';

// 获取所有分组
function getAllGroups($pdo) {
  $stmt = $pdo->prepare("SELECT * FROM `groups`");
  $stmt->execute();

  return $stmt->fetchAll();
}

// 获取指定分组的所有用户
function getUsersByGroup($pdo, $groupId) {
  $stmt = $pdo->prepare("SELECT * FROM `users` WHERE `group_id` = ?");
  $stmt->execute([$groupId]);

  return $stmt->fetchAll();
}

// 发送邮件
function sendEmail($sender, $receiver, $subject, $content) {
  $mail = new PHPMailerPHPMailerPHPMailer();
  
  $mail->CharSet = 'UTF-8';
  $mail->isSMTP();
  $mail->SMTPDebug  = 0;
  $mail->Host       = 'smtp.gmail.com'; // 邮件服务器地址
  $mail->SMTPAuth   = true;
  $mail->Username   = 'your-email@gmail.com'; // 发件人邮箱地址
  $mail->Password   = 'your-email-password'; // 发件人邮箱密码
  $mail->SMTPSecure = 'ssl';
  $mail->Port       = 465;

  $mail->setFrom($sender); // 发件人邮箱地址
  $mail->addAddress($receiver); // 收件人邮箱地址
  $mail->isHTML(true);
  $mail->Subject = $subject;
  $mail->Body    = $content;

  return $mail->send();
}

// 发送分组邮件
function sendGroupEmail($groupId, $subject, $content) {
  global $pdo;

  $users = getUsersByGroup($pdo, $groupId);
  
  foreach ($users as $user) {
    $receiver = $user['email'];
    sendEmail('your-email@gmail.com', $receiver, $subject, $content);
  }
}

// 测试发送邮件
function testSendEmail() {
  sendEmail('your-email@gmail.com', 'receiver-email@gmail.com', '测试邮件', '这是一封测试邮件。');
}

// 测试发送分组邮件
function testSendGroupEmail() {
  sendGroupEmail(1, '测试分组邮件', '这是一封测试分组邮件。');
}

// 测试代码
testSendEmail();
testSendGroupEmail();

In the above code, we have defined some functions to implement The function of sending emails. getAllGroups() The function is used to get the information of all groups, getUsersByGroup() The function is used to get all users of the specified group, sendEmail() The function is used to send Email, sendGroupEmail() function is used to send group emails.

In the test code part, we defined two test functions testSendEmail() and testSendGroupEmail(), which are used to test the functions of sending emails and sending group emails.

In actual use, you need to change the sender's email address and password in the code to your own information, and adjust other parameters according to your needs, such as the mail server address, port, etc.

Through the above code, we can implement group management of users on the website, and realize the function of sending emails through PHP and PHPMAILER. You can further improve the code according to actual needs, such as adding a user management interface for convenient user and group management.

In summary, by learning PHP and PHPMAILER, we can easily implement the group management function of email sending in the website. This is an essential part of many websites. Hope this article can be helpful to you.

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