How can dynamic emails be sent using PHP's mail() function?

Dynamic emails can be sent using PHP's mail() function by including variables in the email message body. These variables can be populated with data from a database, form submission, or any other source. By concatenating these variables with the email message, you can send personalized and dynamic content to recipients.

<?php
$to = "recipient@example.com";
$subject = "Dynamic Email";
$message = "Hello, " . $recipient_name . "! This is a dynamic email.";
$headers = "From: sender@example.com";

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