How can you include an entire folder in PHP?

To include an entire folder in PHP, you can use the `glob` function to get an array of all files in the folder and then loop through the array to include each file individually. This allows you to dynamically include all files in a folder without specifying each file individually.

$files = glob('/path/to/folder/*.php');
foreach ($files as $file) {
    include $file;
}