PHP使用phpmailer发送邮件

1、安装邮件发送扩展
composer require phpmailer/phpmailer
2、发送邮件配置和发送
 $mail = new PHPMailer(true);
    try {
        //Server settings
        $mail->SMTPDebug = 2;                                       // Enable verbose debug output
        $mail->isSMTP();                                            // Set mailer to use SMTP
        $mail->Host       = 'smtp.mxhichina.com';                // 这里使用阿里云的企业邮箱服务器
        $mail->SMTPAuth   = true;                                   // Enable SMTP authentication
        $mail->Username   = '你的邮箱用户名';                     // SMTP username
        $mail->Password   = '你的邮箱密码';                               // SMTP password
        $mail->SMTPSecure = 'ssl';                                  // Enable TLS encryption, `ssl` also accepted
        $mail->Port       = 465;                                    // TCP port to connect to

        //Recipients
        $mail->setFrom('来源邮箱地址', '小智');
        $mail->addAddress('接收人邮箱', '邮箱昵称');     // Add a recipient
        $mail->addReplyTo('来源邮箱地址', '小智');
        //$mail->addCC('cc@example.com');
        //$mail->addBCC('bcc@example.com');

        // Attachments
        $mail->addAttachment('附件相对路径地址','附件名称');         // Add attachments

        // Content
        $mail->isHTML(true);                                  // Set email format to HTML
        $mail->Subject = '邮件标题';
        $mail->Body    = '邮件正文';

        $mail->send();
        echo '邮件已发送';
    } catch (Exception $e) {
        echo "邮件未发送成功，错误信息: {$mail->ErrorInfo}";
    }