如何使用PHP和PHPMAILER来发送电子邮件？

require 'PHPMailer/PHPMailer.php';
require 'PHPMailer/SMTP.php';
require 'PHPMailer/Exception.php';

use PHPMailerPHPMailerPHPMailer;
use PHPMailerPHPMailerSMTP;
use PHPMailerPHPMailerException;

// 创建一个新的PHPMailer对象
$mail = new PHPMailer(true);

try {
    // 配置SMTP服务器
    $mail->IsSMTP();
    $mail->Host = 'smtp.example.com';
    $mail->SMTPAuth = true;
    $mail->Username = 'your_email@example.com';
    $mail->Password = 'your_password';
    $mail->SMTPSecure = 'ssl';
    $mail->Port = 465;

    // 设置发件人和收件人
    $mail->setFrom('your_email@example.com', 'Your Name');
    $mail->addAddress('recipient@example.com', 'Recipient Name');

    // 设置邮件主题和内容
    $mail->Subject = 'Test Email';
    $mail->Body = 'This is a test email sent from PHPMAILER.';

    // 添加附件（可选）
    //$mail->addAttachment('path_to_file');

    // 发送邮件
    $mail->send();

    echo 'Email sent successfully!';
} catch (Exception $e) {
    echo 'Email could not be sent. Error: ', $mail->ErrorInfo;
}