How can PHP developers improve code readability and maintainability by separating HTML and PHP code in their scripts?

Separating HTML and PHP code in scripts can improve code readability and maintainability by making it easier to understand and modify each part separately. This separation also allows for better organization and reuse of code, as well as enabling collaboration between developers working on different aspects of the project.

<?php
// PHP code
$name = "John Doe";
$age = 30;
?>

<!DOCTYPE html>
<html>
<head>
    <title>User Profile</title>
</head>
<body>
    <h1>Welcome, <?php echo $name; ?>!</h1>
    <p>You are <?php echo $age; ?> years old.</p>
</body>
</html>