PHP与IMAP

PHP、Java和C++都可以与IMAP服务器结合使用，实现邮件的发送和接收功能，下面分别介绍这三种语言的实现方法：

1. PHP:

<?php
$hostname = '{imap.gmail.com:993/imap/ssl/oauth2}INBOX;';
$username = 'your_email@example.com';
$password = 'your_password';
$inbox = imap_open($hostname, $username, $password) or die('Cannot connect to Gmail: ' . imap_last_error());
$emails = imap_search($inbox, 'UNSEEN');
$unread_count = count($emails);
imap_close($inbox);
echo "Unread emails count: " . $unread_count;
?>

2. Java:

import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
public class SendEmail {
    public static void main(String[] args) {
        String to = "recipient@example.com";
        String from = "your_email@example.com";
        String host = "smtp.gmail.com";
        String username = "your_email@example.com";
        String password = "your_password";
        Properties properties = System.getProperties();
        properties.setProperty("mail.smtp.host", host);
        properties.setProperty("mail.smtp.auth", "true");
        properties.setProperty("mail.smtp.starttls.enable", "true");
        properties.setProperty("mail.smtp.port", "587");
        Session session = Session.getInstance(properties, new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username, password);
            }
        });
        try {
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress(from));
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
            message.setSubject("Test Email");
            message.setText("This is a test email sent using JavaMail API and IMAP.");
            Transport transport = session.getTransport("smtp");
            transport.connect(host, username, password);
            transport.sendMessage(message, message.getAllRecipients());
            transport.close();
            System.out.println("Email sent successfully!");
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}

3. C++: