What are some alternative methods to display HTML code with included files in PHP?

When displaying HTML code with included files in PHP, one alternative method is to use the `file_get_contents()` function to read the contents of the included file and then echo it within the HTML code. This allows for a cleaner and more organized way to display HTML code with included files.

<?php
// Include file contents using file_get_contents()
$included_file = file_get_contents('included_file.html');

// Echo the included file contents within the HTML code
echo "<html>
<head>
    <title>Displaying HTML Code with Included Files</title>
</head>
<body>
    $included_file
</body>
</html>";
?>