composer require phpmailer/phpmailer

<?phpheader('content-type:text/html;charset=utf-8;');set_time_limit(3600);require "vendor/autoload.php";$send_res = sendEmail('主题', '内容', 'jianlong@123.io');die;// phpmailer 的使用// sendEmail('主题', '内容', '收件邮箱', '附件');function sendEmail($subject, $contents, $to_email, $attach_file=''){$mail = new PHPMailer\PHPMailer\PHPMailer();$mail->isSMTP();$mail->CharSet = 'utf8'; //设定邮件编码$mail->Host = 'smtp.exmail.qq.com'; //SMTP服务器$mail->SMTPAuth = true;$mail->Username = 'noreply@jianlong.io'; //邮箱用户名$mail->Password = '密码或者授权码'; //密码或者授权码$mail->SMTPSecure = "ssl";$mail->Port = 465;//服务器端口 25 或者465 具体要看邮箱服务器支持$mail->IsHTML(true);$mail->setFrom("noreply@jianlong.io", "jianlong");//发件人//$mail->addReplyTo('xxxx@163.com', 'info');//回复的时候回复给哪个邮箱 建议和发件人一致$mail->addAddress($to_email);//$mail->addAddress('ellen@example.com'); // 可添加多个收件人//$mail->addCC('cc@example.com');//抄送//$mail->addBCC('bcc@example.com');//密送if (!empty($attach_file)) {$file_name = basename($attach_file);$mail->AddAttachment($attach_file, $file_name); // 发送附件并且重命名}$mail->Subject = $subject;$mail->Body = $contents;//$mail->AltBody = '如果邮件客户端不支持HTML则显示此内容';if (!$mail->send()) {trace($mail->ErrorInfo, 'error');return 0;} else {return 1;}}