Find files in specific folder

scanDir.php

function scanDir($dir, $contains = null, $sort = 'date', $order = 'ASC', $ignored = array('.', '..', '.htaccess'))
{

  $files = array();
  $finfo = finfo_open(FILEINFO_MIME_TYPE);

  // die('/'.$contains.'(\D)/');

  foreach (scandir($dir) as $i => $file) {
    if (in_array($file, $ignored)) {
      continue;
    }

    if (isset($contains) && is_string($contains)) {
      $key = $contains;
      preg_match('/' . $key . '(\D)/i', $file, $matches);
      if (count($matches) === 0) {
        continue;
      }

    } else if (isset($contains) && is_array($contains)) {
      $continue = false;
      foreach ($contains as $key) {
        preg_match('/' . $key . '(\D)/i', $file, $matches);
        if (count($matches) === 0) {
          $continue = true;
          continue;
        }
      }
      if ($continue) {
        continue;
      }

    }

    $files[$i] = array(
      'iter' => $i,
      'date' => filemtime($dir . '/' . $file),
      'name' => pathinfo($file, PATHINFO_FILENAME),
      'file' => $file,
      'path' => $dir,
      'size' => humanFilesize(filesize($dir . '/' . $file)),
      'mime' => finfo_file($finfo, $dir . '/' . $file),
      'type' => MIME::group(pathinfo($dir . '/' . $file, PATHINFO_EXTENSION)),
      'sort-name' => strtolower(trim(str_replace($contains, '', pathinfo($file, PATHINFO_FILENAME)))),
      'sort-size' => filesize($dir . '/' . $file),
    );
  }

  finfo_close($finfo);

  usort($files, function ($a, $b) use ($sort, $order) {
    if (is_string($a[$sort])) {
      if ($order === 'ASC') {
        return strcmp(static::slug($a[$sort]), static::slug($b[$sort]));
      }

      if ($order === 'DESC') {
        return strcmp(static::slug($b[$sort]), static::slug($a[$sort]));
      }

    } else {
      if ($order === 'ASC') {
        return $a[$sort] - $b[$sort];
      }

      if ($order === 'DESC') {
        return $b[$sort] - $a[$sort];
      }

    }
  });

  return ($files) ? $files : [];
}

function humanFilesize($bytes, $decimals = 2)
{
  $sz = array('B', 'KB', 'MB', 'GB', 'TB', 'PB');
  $factor = floor((strlen($bytes) - 1) / 3);
  return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) .' '. @$sz[$factor];
}