Use PHP to implement mass mailing function

With the popularity of the Internet, email has become a communication method that people often use. In many cases, emails need to be sent to a large number of people, such as company marketing campaigns, event organizers sending notifications to participants, etc. At this point, manually sending emails one by one is obviously not efficient enough. Therefore, the mass mailing function has become one of the functions that many people need.

In this article, we will introduce how to use PHP to implement mass email functionality.

1. Principle of mass mailing

The principle of mass mailing is very simple, which is to send the email content to multiple people. However, if you use an ordinary email client to send emails to multiple people, the emails may be identified as spam due to frequent emails, and may even be rejected by the mail server. Therefore, using PHP programs to implement mass mailing functions is a safer and more reliable way.

2. Use PHPMailer to implement mass mailing

To implement the mass mailing function, we need to use PHPMailer. PHPMailer is a PHP email sending library that can easily implement functions such as email sending and email template generation.

1. Installing PHPMailer

Installing PHPMailer is very simple, just copy the PHPMailer class and SMTP class files to your project. You can download the latest PHPMailer from the official website, or install it through Composer. Here we introduce how to install PHPMailer through Composer.

(1) First, you need to install Composer. If you already have Composer installed, you can skip this step.

(2) Create a new composer.json file in the root directory of the project. The file content is as follows:

{
  "require": {
    "phpmailer/phpmailer": "6.5.0"
  }
}

(3) Execute the command in the command line to install PHPMailer:

composer install

2. Implementing the mass mailing function

After understanding the installation of PHPMailer, we can start to implement the mass mailing function.

(1) First, you need to introduce the PHPMailer class file:

use PHPMailerPHPMailerPHPMailer;
use PHPMailerPHPMailerException;

(2) Then, you need to configure some parameters for email sending, such as mail server, user name, password, etc.:

$mail = new PHPMailer(true); 

// 配置SMTP服务器
$mail->isSMTP(); 
$mail->Host = 'smtp.qq.com'; 

// 配置加密方式
$mail->SMTPSecure = 'ssl'; 
$mail->SMTPAuth = true; 

// 配置邮件账户
$mail->Username = 'youremail@qq.com'; 
$mail->Password = 'yourpassword'; 

// 配置邮件发送人和收件人
$mail->From = 'youremail@qq.com';
$mail->FromName = '发件人姓名';
$mail->addAddress('recipient1@example.com', '收件人1');
$mail->addAddress('recipient2@example.com', '收件人2');

// 配置邮件主题和内容
$mail->isHTML(true);
$mail->Subject = '这是邮件主题';
$mail->Body    = '这是邮件内容';

(3) Finally, call the $mail->send() method to send the email:

if($mail->send()) {
  echo '邮件发送成功！';
} else {
  echo '邮件发送失败：' . $mail->ErrorInfo;
}

In the above code, we only send two messages to The sender sent an email. If you want to send an email to more recipients, just call the addAddress method multiple times.

3. Notes

When using PHPMailer to send mass emails, you need to pay attention to the following points:

1. Mail server restrictions: Different mail servers have different requirements for sending emails. There are different limits on the quantity and frequency of sending. In order to avoid being rejected by the mail server as spam, we should limit the quantity and frequency of sending emails.
2. Email account verification: Different email servers require different verification methods. When using PHPMailer to send emails, you need to configure relevant server and account information, and use $mail->SMTPAuth = true; to enable the verification function.
3. Email content formatting: The email content is rendered in HTML format, so you need to pay attention to the issue of email content formatting. We can use HTML tags for layout, and we can also use CSS styles for design.

4. Conclusion

The mass mailing function is one of the functions that many people need. By using the PHPMailer library, we can easily implement the mass mailing function. When implementing mass email, we need to pay attention to the limitations on the number and frequency of emails, as well as issues such as email account verification and email content formatting.

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