What are potential issues that may arise when using includes in a div container in PHP?

One potential issue that may arise when using includes in a div container in PHP is that the included file may not be able to access variables defined in the parent file. To solve this, you can use the `include` or `require` functions within the div container itself to ensure that the included file has access to the necessary variables.

<div>
    <?php
        $variable = "Hello, world!";
        include 'included_file.php';
    ?>
</div>