//path to directory to scan
$directory = "../images/team/harry/";
 
//get all image files with a .jpg extension.
$images = glob("" . $directory . "*.jpg");
 
//print each file name
foreach($images as $image)
{
echo $image;
}

The .jpg extension can be changed to any extension. So if you want to pull out only .txt files, you just need to replace the .jpg with .txt. If you want to list ALL files, just remove the condition.

list all files in a directory

list, files

PHP