我使用 phpmailer 通过 smtp.google.com 服务器发送邮件，但现在它无法正常工作，因为他们说使用 OAuth2.0 配置。

我参考了一些示例并使用使用 PhpMailer 和 Gmail XOAUTH2 发送电子邮件创建了一个示例页面来测试它，但它不起作用。谁能指出代码中出了什么问题吗？

这是我的 html 页面

sendContactMail($_POST);
}
?>






    

        


            

                Name 
 
            
            

                Email 
 
            
            

                Subject 
 
            
            

                Message 

                
            
            

                

                

                        
                            
Message'>
                        
                    
            
        
    
    

这是 get_oauth_token.php

 * @author Jim Jagielski (jimjag) 
 * @author Andy Prevost (codeworxtech) 
 * @author Brent R. Matzelle (original founder)
 * @copyright 2012 - 2020 Marcus Bointon
 * @copyright 2010 - 2012 Jim Jagielski
 * @copyright 2004 - 2009 Andy Prevost
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 * @note This program is distributed in the hope that it will be useful - WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 */

/**
 * Get an OAuth2 token from an OAuth2 provider.
 * * Install this script on your server so that it's accessible
 * as [https/http]:////get_oauth_token.php
 * e.g.: http://localhost/phpmailer/get_oauth_token.php
 * * Ensure dependencies are installed with 'composer install'
 * * Set up an app in your Google/Yahoo/Microsoft account
 * * Set the script address as the app's redirect URL
 * If no refresh token is obtained when running this file,
 * revoke access to your app and run the script again.
 */

namespace PHPMailer\PHPMailer;

/**
 * Aliases for League Provider Classes
 * Make sure you have added these to your composer.json and run `composer install`
 * Plenty to choose from here:
 * @see http://oauth2-client.thephpleague.com/providers/thirdparty/
 */
//@see https://github.com/thephpleague/oauth2-google
use League\OAuth2\Client\Provider\Google;
//@see https://packagist.org/packages/hayageek/oauth2-yahoo
use Hayageek\OAuth2\Client\Provider\Yahoo;
//@see https://github.com/stevenmaguire/oauth2-microsoft
use Stevenmaguire\OAuth2\Client\Provider\Microsoft;

if (!isset($_GET['code']) && !isset($_GET['provider'])) {
    ?>

Select Provider:

Google

Yahoo

Microsoft/Outlook/Hotmail/Live/Office365



     $clientId,
    'clientSecret' => $clientSecret,
    'redirectUri' => $redirectUri,
    'accessType' => 'offline'
];

$options = [];
$provider = null;

switch ($providerName) {
    case 'Google':
        $provider = new Google($params);
        $options = [
            'scope' => [
                'https://mail.google.com/'
            ]
        ];
        break;
    case 'Yahoo':
        $provider = new Yahoo($params);
        break;
    case 'Microsoft':
        $provider = new Microsoft($params);
        $options = [
            'scope' => [
                'wl.imap',
                'wl.offline_access'
            ]
        ];
        break;
}

if (null === $provider) {
    exit('Provider missing');
}

if (!isset($_GET['code'])) {
    //If we don't have an authorization code then get one
    $authUrl = $provider->getAuthorizationUrl($options);
    $_SESSION['oauth2state'] = $provider->getState();
    header('Location: ' . $authUrl);
    exit;
    //Check given state against previously stored one to mitigate CSRF attack
} elseif (empty($_GET['state']) || ($_GET['state'] !== $_SESSION['oauth2state'])) {
    unset($_SESSION['oauth2state']);
    unset($_SESSION['provider']);
    exit('Invalid state');
} else {
    unset($_SESSION['provider']);
    //Try to get an access token (using the authorization code grant)
    $token = $provider->getAccessToken(
        'authorization_code',
        [
            'code' => $_GET['code']
        ]
    );
    //Use this to interact with an API on the users behalf
    //Use this to get a new access token if the old one expires
    echo 'Refresh Token: ', $token->getRefreshToken();
}

提交表单时，显示错误

致命错误：未捕获错误：在 lib/MailService.php:31 中找不到类“Phppot\SMTP”堆栈跟踪：#0 index.php(7): Phppot\MailService->sendContactMail(Array) #1 {main}抛出在 lib/MailService.php 第 31 行

已编辑

这是我的 MailService.php 文件

Port to send
        // mail using phpmail instead of smtp.
        $mail->isSMTP();
        //Enable SMTP debugging
        //SMTP::DEBUG_OFF = off (for production use)
        //SMTP::DEBUG_CLIENT = client messages
        //SMTP::DEBUG_SERVER = client and server messages
        $mail->SMTPDebug = SMTP::DEBUG_OFF;

        //Set the hostname of the mail server
        $mail->Host = Config::SMTP_HOST;

        //Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission
        $mail->Port = Config::SMTP_PORT;

        //Set the encryption mechanism to use - STARTTLS or SMTPS
        $mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;

        //Whether to use SMTP authentication
        $mail->SMTPAuth = true;

        //Set AuthType to use XOAUTH2
        $mail->AuthType = 'XOAUTH2';

        //Fill in authentication details here
        //Either the gmail account owner, or the user that gave consent
        $oauthUserEmail = Config::OAUTH_USER_EMAIL;
        $clientId = Config::OAUTH_CLIENT_ID;
        $clientSecret = Config::OAUTH_SECRET_KEY;

        //Obtained by configuring and running get_oauth_token.php
        //after setting up an app in Google Developer Console.
        $refreshToken = Config::REFRESH_TOKEN;

        //Create a new OAuth2 provider instance
        $provider = new Google(
            [
                'clientId' => $clientId,
                'clientSecret' => $clientSecret,
            ]
            );

        //Pass the OAuth provider instance to PHPMailer
        $mail->setOAuth(
            new OAuth(
                [
                    'provider' => $provider,
                    'clientId' => $clientId,
                    'clientSecret' => $clientSecret,
                    'refreshToken' => $refreshToken,
                    'userName' => $oauthUserEmail,
                ]
                )
            );

        // Recipients
        $mail->setFrom(Config::SENDER_EMAIL, $name);
        $mail->addReplyTo($email, $name);

        $mail->addAddress(Config::RECIPIENT_EMAIL, Config::RECIPIENT_EMAIL);

        $mail->Subject = $subject;

        $mail->CharSet = PHPMailer::CHARSET_UTF8;
        $mail->msgHTML($mailBody);

        //Replace the plain text body with one created manually
        $mail->AltBody = 'This is a plain-text message body';

        if (!$mail->send()) {
            $output = json_encode(array('type'=>'error', 'text' => ''.$from.' is invalid.'));
            $output = json_encode(array('type'=>'error', 'text' => 'Server error. Please mail vincy@phppot.com'));
        } else {
            $output = json_encode(array('type'=>'message', 'text' => 'Thank you, I will get back to you shortly.'));
        }
        return $output;
    }
}