How can one effectively integrate PHP variables into HTML templates?

To effectively integrate PHP variables into HTML templates, you can use PHP echo statements within your HTML code to output the variable values. This allows you to dynamically insert PHP variables into your HTML templates, making your web pages more dynamic and personalized.

<!DOCTYPE html>
<html>
<head>
    <title>PHP Variable Integration</title>
</head>
<body>
    <h1>Welcome, <?php echo $username; ?></h1>
    <p>Your email address is: <?php echo $email; ?></p>
</body>
</html>