PHP メール機能の探索: Web サイトで電子メールを送信する方法

mail($to, $subject, $message, $headers);

$to = "receiver@example.com";
$subject = "邮件主题";
$message = "这是一封测试邮件，您收到此邮件表示配置成功！";
$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！";
}

$to = "receiver@example.com";
$subject = "HTML格式邮件";
$message = "<h1>这是一封HTML格式的邮件</h1><p>点击<a href='https://example.com'>这里</a>访问网站</p>";
$headers = "MIME-Version: 1.0
";
$headers .= "Content-type: text/html; charset=utf-8
";
$headers .= "From: sender@example.com
";

if (mail($to, $subject, $message, $headers)) {
    echo "HTML格式邮件发送成功！";
} else {
    echo "HTML格式邮件发送失败！";
}

$to = "receiver@example.com";
$subject = "带附件的邮件";
$message = "这是一封带有附件的邮件，请查收！";
$filename = "attachment.pdf";
$file = file_get_contents($filename);
$attachment = chunk_split(base64_encode($file));
$headers = "MIME-Version: 1.0
";
$headers .= "Content-Type: multipart/mixed; boundary="boundary"
";
$headers .= "From: sender@example.com
";
$body = "--boundary
";
$body .= "Content-Type: text/html; charset=utf-8
";
$body .= "
$message
";
$body .= "--boundary
";
$body .= "Content-Type: application/pdf; name="$filename"
";
$body .= "Content-Transfer-Encoding: base64
";
$body .= "Content-Disposition: attachment; filename="$filename"
";
$body .= "
$attachment
";
$body .= "--boundary--";

if (mail($to, $subject, $body, $headers)) {
    echo "带附件的邮件发送成功！";
} else {
    echo "带附件的邮件发送失败！";
}