使用电子邮件PHP发送多个附件

$to = "recipient@example.com";
$subject = "多个附件的邮件";
$message = "这是一封包含多个附件的邮件。";
$headers = "From: sender@example.com\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: multipart/mixed; boundary=\"boundary\"\r\n";

$body = "--boundary\r\n";
$body .= "Content-Type: text/plain; charset=\"utf-8\"\r\n";
$body .= "Content-Transfer-Encoding: 7bit\r\n\r\n";
$body .= $message."\r\n";

// 添加附件
$attachment1 = "/path/to/attachment1.pdf";
$attachment2 = "/path/to/attachment2.jpg";

$body .= "--boundary\r\n";
$body .= "Content-Type: application/pdf; name=\"attachment1.pdf\"\r\n";
$body .= "Content-Transfer-Encoding: base64\r\n";
$body .= "Content-Disposition: attachment\r\n\r\n";
$body .= chunk_split(base64_encode(file_get_contents($attachment1)))."\r\n";

$body .= "--boundary\r\n";
$body .= "Content-Type: image/jpeg; name=\"attachment2.jpg\"\r\n";
$body .= "Content-Transfer-Encoding: base64\r\n";
$body .= "Content-Disposition: attachment\r\n\r\n";
$body .= chunk_split(base64_encode(file_get_contents($attachment2)))."\r\n";

$body .= "--boundary--\r\n";

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