Break if no file found in directory

Good day to you,
I have a function which return an array of files.
I would need it to break if there is no file in the directory.

Here is the code :

function compileList($extensions)
{
     if ($handle = opendir('.')) {
   while (false !== ($file = readdir($handle)))
      {
          $ext = strtolower(end(explode('.', $file)));
       
          if (in_array($ext, $extensions) AND $file != "." AND $file != "..")
              {
                  $files[$file]=implode(file($file));
              }
       }
  closedir($handle);
  }
  return $files;
         
}

PHP:

Thanks !

 

if (empty($files))
{
    echo 'No results';
    return null;
}
return

PHP: