How can automatic emails generated in PHP be customized to prevent certain headers from being displayed at the top?

When generating automatic emails in PHP, certain headers may be displayed at the top of the email, revealing sensitive information such as server paths or software versions. To prevent this, you can customize the email headers using the `mail()` function in PHP to only include necessary headers like From, To, and Subject, while excluding any additional headers.

$to = "recipient@example.com";
$subject = "Your Subject Here";
$message = "Your Message Here";

$headers = "From: yourname@example.com\r\n";
$headers .= "Reply-To: yourname@example.com\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: text/html; charset=ISO-8859-1\r\n";

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