php8 dirty fix

the plugin is not compatible with PHP8

to fix this just replace the function “filter_wp_unique_filename” in wp-content/plugins/do-spaces-sync/dos_class.php
with this

public function filter_wp_unique_filename($filename) {
// php8 workaround

  $upload_dir = wp_upload_dir();
  $subdir = $upload_dir['subdir'];

  // If this plugin isn't configured, don't interfere
  if (empty($this->key) || empty($this->secret) || empty($this->container) || empty($this->endpoint)) {
    return $filename;
  }

  try {
    $filesystem = DOS_Filesystem::get_instance($this->key, $this->secret, $this->container, $this->endpoint);

    $number = 1;
    $new_filename = $filename;
    $fileparts = pathinfo($filename);

    // If no extension, avoid notices
    $base = $fileparts['filename'] ?? $new_filename;
    $ext  = $fileparts['extension'] ?? '';

    $cdnPath = rtrim($this->storage_path,'/') . '/' . ltrim($subdir,'/') . '/' . $new_filename;

    // Safety cap to prevent infinite loops
    $maxTries = 200;

    while ($maxTries-- > 0) {
      $exists = false;

      try {
        $exists = $filesystem->has($cdnPath);
      } catch (\Throwable $e) {
        // If remote check fails, don't block uploads
        return $filename;
      }

      if (!$exists) break;

      $new_filename = $ext !== ''
        ? ($base . "-$number." . $ext)
        : ($base . "-$number");

      $number++;
      $cdnPath = rtrim($this->storage_path,'/') . '/' . ltrim($subdir,'/') . '/' . $new_filename;
    }

    return $new_filename;

  } catch (\Throwable $e) {
    // Anything AWS/Guzzle-related exploding should never kill WordPress uploads
    return $filename;
  }
}