Get file path from Storage.php

<?php

function getFilePath($disk, $filename)
{
  $config = config("filesystems.disks.$disk");
  $url    = app('filesystem')->disk($disk)->url($filename);  // get the file url
  $root   = array_get($config, 'root');

  // for other disks without root ex."cloud"
  if (!$root){
    return preg_replace('/(.*\/\/.*?)\//', '', $url); // get the full path
  }
  
  $dir = str_replace(array_get($config, 'url'), '', $url);   // remove the uri

  return $root . $dir; // get the full path
}