What are the best practices for including a link for non-HTML email readers in a newsletter?

When sending newsletters via email, it's important to provide a clickable link for non-HTML email readers who may not be able to view HTML content. One way to do this is by including the URL within the text of the email itself, so that even if the link is not clickable, the recipient can still copy and paste it into their browser.

<?php
$link = 'https://www.example.com'; // Your link URL
$text = 'Click here to visit our website'; // The text to display for the link

// Include the link URL within the text of the email
$message = "To view our website, please copy and paste the following link into your browser: $link";

// Send the email with the message containing the link
mail('recipient@example.com', 'Newsletter', $message);
?>