PHP-Plugin PHPMailer versendet E-Mails

/**
 * 功能：邮件发送函数
 * @param string $to 目标邮箱
 * @param string $subject 邮件主题（标题）
 * @param string $to 邮件内容
 * @return bool true
 */
 function sendMail($to, $subject, $content) {
 vendor('PHPMailer.class#smtp'); 
 vendor('PHPMailer.class#phpmailer'); //注意这里的大小写哦，不然会出现找不到类，PHPMailer是文件夹名字，class#phpmailer就代表class.phpmailer.php文件名
 $mail = new PHPMailer();
 // 装配邮件服务器
 if (C('MAIL_SMTP')) {
  $mail->IsSMTP();
 }
 $mail->Host = C('MAIL_HOST'); //这里的参数解释见下面的配置信息注释
 $mail->SMTPAuth = C('MAIL_SMTPAUTH'); 
 $mail->Username = C('MAIL_USERNAME');
 $mail->Password = C('MAIL_PASSWORD');
 $mail->SMTPSecure = C('MAIL_SECURE');
 $mail->CharSet = C('MAIL_CHARSET');
 // 装配邮件头信息
 $mail->From = C('MAIL_USERNAME');
 $mail->AddAddress($to);
 $mail->FromName = C('MAIL_FROMNAME');
 $mail->IsHTML(C('MAIL_ISHTML'));
 // 装配邮件正文信息
 $mail->Subject = $subject;
 $mail->Body = $content;
 // 发送邮件
 if (!$mail->Send()) {
  return FALSE;
 } else {
  return TRUE;
 }
 }

<?php
 return array(
 //其他配置项省略......
 // 配置邮件发送服务器
 &#39;MAIL_SMTP&#39;   => TRUE,
 &#39;MAIL_HOST&#39;   => &#39;smtp.163.com&#39;,   //邮件发送SMTP服务器
 &#39;MAIL_SMTPAUTH&#39; => TRUE,
 &#39;MAIL_USERNAME&#39; => &#39;123***@163.com&#39;,  //SMTP服务器登陆用户名
 &#39;MAIL_PASSWORD&#39; => &#39;123456abc&#39;,    //SMTP服务器登陆密码
 &#39;MAIL_SECURE&#39;   => &#39;tls&#39;,
 &#39;MAIL_CHARSET&#39;  => &#39;utf-8&#39;,
 &#39;MAIL_ISHTML&#39;   => TRUE,
 &#39;MAIL_FROMNAME&#39; => &#39;某某网站客户&#39;,
 );

<?php
 namespace Home\Controller;
 use Think\Controller;
 class IndexController extends Controller {
 public function index(){
  
 }
 public function send(){
  if(sendMail(&#39;vsiryxm@qq.com&#39;,&#39;你好!邮件标题&#39;,&#39;这是一篇测试邮件正文！&#39;)){
   echo &#39;发送成功！&#39;;
  }
  else{
   echo &#39;发送失败！&#39;;
  }
 }
 }