if (!is_object($this->smtp)) {
include_once 'SMTP.php';
$this->smtp=new SMTP();
}

<?php
namespace app\api\controller;
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use think\Controller;
use think\Loader;
class Mailsms  extends Controller
{//发送商，，，QQ企业邮箱地址都是smtp.exmail.qq.comconst HOST='smtp.exmail.qq.com';//发件人邮箱....企业邮箱中一个成员的账号const USERNAME='youname@youyuming.top';//发件箱授权码。。。。。。这里是成员账号的登录密码const PASSWORD='passworld';//发送模板const TEMPLATE='您的验证码是{code}，请在10分钟内填写。';//是否debug 测试环境使用const DEBUG=true;//实例protected $mail;public function _initialize(){Loader::import("org.PHPMailer.src.Exception",EXTEND_PATH,".php");Loader::import("org.PHPMailer.src.PHPMailer",EXTEND_PATH,".php");Loader::import("org.PHPMailer.src.SMTP",EXTEND_PATH,".php");$this->mail=new PHPMailer();}/*** target 发送给谁 收件人的邮箱* subject 主题* code 验证码apiMailsms/index*/public function sendMail($target,$subject,$code){$content = str_replace('{code}',$code,self::TEMPLATE);try{$this->mail->SMTPDebug=self::DEBUG;$this->mail->isSMTP();$this->mail->Host=self::HOST;//服务器$this->mail->SMTPAuth=true;//是否开启SMTP认证$this->mail->Username=self::USERNAME;//发件人邮箱$this->mail->Password=self::PASSWORD;//发件箱授权码// $this->mail->SMTPSecure='tls';//启用TLS加密，' ssl '也接受//  $this->mail->Port='25';//端口　　　　　　//注意使用阿里域名的需要使用ssl加密，465端口，$this->mail->SMTPSecure='ssl';//启用TLS加密，' ssl '也接受$this->mail->Port='465';//端口$this->mail->CharSet='UTF-8';//设置邮件内容编码$this->mail->setFrom(self::USERNAME); //发件人//$this->mail->addAttachment('/var/tmp/file.tar.gz');//附件//$this->mail->addAttachment('/tmp/image.jpg', 'new.jpg');//附件重命名$this->mail->addAddress($target);//发送给谁$this->mail->isHTML(true);$this->mail->Subject=$subject;$this->mail->Body=$content;//$this->mail->AltBody ='This is the body in plain text for non-HTML mail clients';if($this->mail->send()){
echo "发送成功！";}else{echo "发送失败！";}}catch(Exception $e) {echo "异常抛出";}}
public function index(){$this->sendMail('收件人的邮箱','邮箱标题',自定义数据);
}
}