How can PHP be used to display all files from a folder on a webpage?

To display all files from a folder on a webpage using PHP, you can use the `scandir()` function to get an array of all files in the directory, then iterate through the array and display each file name on the webpage.

<?php
$dir = "your_directory_path_here";
$files = scandir($dir);

foreach($files as $file){
    if($file != '.' && $file != '..'){
        echo $file . "<br>";
    }
}
?>