PHP学习笔记：电子邮件与邮件系统

<?php
$to = "recipient@example.com";
$subject = "测试邮件";
$message = "这是一封测试邮件";
$headers = "From: sender@example.com";
 
if(mail($to, $subject, $message, $headers)){
    echo "邮件发送成功";
} else{
    echo "邮件发送失败";
}
?>

<?php
$to = "recipient@example.com";
$subject = "测试HTML邮件";
$message = "<h1>这是一封测试HTML邮件</h1>";
$headers = "From: sender@example.com
";
$headers .= "Content-Type: text/html; charset=UTF-8
";
 
if(mail($to, $subject, $message, $headers)){
    echo "邮件发送成功";
} else{
    echo "邮件发送失败";
}
?>

<?php
require 'PHPMailer/PHPMailer.php';
require 'PHPMailer/SMTP.php';
 
$mail = new PHPMailerPHPMailerPHPMailer();
 
$mail->ISSMTP();
$mail->SMTPAuth = true; //开启SMTP验证
$mail->Host = 'smtp.example.com'; //SMTP服务器地址
$mail->Username = 'sender@example.com'; //SMTP用户名
$mail->PassWord = 'password'; //SMTP密码
$mail->SMTPSecure = 'ssl'; //启用SSL加密，这里根据实际情况填写
$mail->Port = 465; //SMTP服务器端口号
 
$mail->SetFrom('sender@example.com', '发件人姓名');
$mail->AddAddress('recipient@example.com', '收件人姓名');
$mail->Subject = '测试附件邮件';
$mail->Body = '<h1>这是一封测试带附件邮件</h1>';
$mail->AddAttachment('path/to/file.pdf', '附件名称.pdf');
 
if($mail->Send()){
    echo "邮件发送成功";
} else{
    echo "邮件发送失败：" . $mail->ErrorInfo;
}
?>

<?php
$hostname = '{imap.example.com:993/imap/ssl}INBOX'; //IMAP服务器地址和端口号
$username = 'username@example.com'; //IMAP用户名
$password = 'password'; //IMAP密码
 
$inbox = imap_open($hostname, $username, $password) or die('无法连接到IMAP服务器');
 
$emails = imap_search($inbox, 'ALL');
 
if($emails){
    foreach($emails as $email_number){
        $overview = imap_fetch_overview($inbox, $email_number, 0);
        echo "发件人：" . $overview[0]->from . "
";
        echo "主题：" . $overview[0]->subject . "
";
        echo "正文：" . imap_fetchbody($inbox, $email_number, 1.1) . "
";
    }
}else{
    echo "没有找到邮件";
}
 
imap_close($inbox);
?>