laravel upload a file and protect against phar attack

upload.php

if ($request->hasFile('file')) {
    $file = $request->file('file');
    $filePath = $file->store('uploads');

    $signature = file_get_contents('phar://' . storage_path('app/' . $filePath) . '/.signature');

    if ($signature !== 'GBMB') {
        // Invalid PHAR file
        Storage::delete($filePath);
        // Handle error
    }

    // File is valid
    // Do something with the file
}