Detailed process of sending emails through PHP through PHPMailer library

With the popularity of the Internet, email has become an indispensable part of people's daily work and life. As a very popular back-end programming language, PHP also provides a rich extension library to meet the needs of sending emails. PHPMailer is one of the most popular and powerful email libraries. It provides rich functions and easy-to-use APIs. This article will introduce in detail the process and operation of sending emails through PHP through the PHPMailer library.

1. Install the PHPMailer library

Before using the PHPMailer library, we need to install it into our project first. The PHPMailer library supports installation using Composer. We can install the PHPMailer library by running the following command in the terminal:

composer require phpmailer/phpmailer

With the above command, Composer will install the PHPMailer library in our project and automatically install all Other libraries it depends on.

2. Introduce the PHPMailer library

After installing the PHPMailer library, we need to introduce it into the project. Assume that our project file structure is as follows:

Project/
├── composer.json
├── composer.lock
└── index.php

Introduce the PHPMailer library into our project through the following code:

require_once 'vendor/autoload.php';

This code will automatically load the files required by the PHPMailer library in the project.

3. Create an email instance

After introducing the PHPMailer library, we need to create an email instance. The PHPMailer library provides a PHPMailer class through which we can create email instances. The following is a code example for creating a mail instance:

// 创建PHPMailer实例
$mail = new PHPMailerPHPMailerPHPMailer();

// 邮件发送方式
$mail->isSMTP();

// SMTP服务器地址
$mail->Host = 'smtp.gmail.com';

// SMTP服务器端口号
$mail->Port = 587;

// SMTP服务器需要验证
$mail->SMTPAuth = true;

// SMTP服务器验证方式
$mail->SMTPSecure = 'tls';

// 邮箱用户名和密码
$mail->Username = 'test@gmail.com';
$mail->Password = 'password';

// 发件人邮箱地址和名称
$mail->setFrom('test@gmail.com', 'Test');

// 邮件主题
$mail->Subject = 'Test Email';

// 邮件内容
$mail->Body = 'This is a test email from PHPMailer.';

// 邮件接收人地址和名称
$mail->addAddress('recipient@gmail.com', 'Recipient');

In the above code, we created a PHPMailer instance and set the SMTP server address, port number, SMTP server authentication method, sender email address and name , email subject, email content, email recipient address and name and other information.

4. Sending emails

After creating the email instance, we need to send the email. The PHPMailer library provides some methods to facilitate us to complete the operation of sending emails. The following is the code to send the email:

// 发送邮件
if ($mail->send()) {
    echo 'Email was sent.';
} else {
    echo 'Email could not be sent.' . $mail->ErrorInfo;
}

In the above code, we send the email through the $mail->send() method. If the email is sent successfully, this method will return true, otherwise it will return false and provide an error message.

5. Complete code example

The following is a complete PHP code example for sending emails through the PHPMailer library:

The above is the complete process and code for sending emails using the PHPMailer library Example. Through the PHPMailer library, we can send emails very conveniently, which is a very practical function whether it is a personal project or a commercial project. 
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