core-bundle/src/Resources/contao/library/Contao/Controller.php
protected static function braceGlob($pattern)
	{
		// Use glob() if possible
		if (false === strpos($pattern, '/**/') && (\defined('GLOB_BRACE') || false === strpos($pattern, '{')))
		{
			return glob($pattern, \defined('GLOB_BRACE') ? GLOB_BRACE : 0);
		}

		$finder = new Finder();
		$regex = Glob::toRegex($pattern);

		// All files in the given template folder
		$filesIterator = $finder
			->files()
			->followLinks()
			->sortByName()
			->in(\dirname($pattern))
		;

		// Match the actual regex and filter the files
		$filesIterator = $filesIterator->filter(function (\SplFileInfo $info) use ($regex)
		{
			$path = $info->getPathname();

			return preg_match($regex, $path) && $info->isFile();
		});

		$files = iterator_to_array($filesIterator);

		return array_keys($files);
	}
protected static function braceGlob($pattern)
	{
		// Use glob() if possible
		if (false === strpos($pattern, '/**/') && (\defined('GLOB_BRACE') || false === strpos($pattern, '{')))
		{
			return glob($pattern, \defined('GLOB_BRACE') ? GLOB_BRACE : 0);
		}

		$finder = new Finder();
		$regex = Glob::toRegex($pattern);

		// All files in the given template folder
		$filesIterator = $finder
			->files()
			->followLinks()
			->sortByName()
			->in(\dirname($pattern))
		;

		// Match the actual regex and filter the files
		$filesIterator = $filesIterator->filter(function (\SplFileInfo $info) use ($regex)
		{
			$path = $info->getPathname();

			return preg_match($regex, $path) && $info->isFile();
		});

		$files = iterator_to_array($filesIterator);

		return array_keys($files);
	}
Return the files matching a GLOB pattern

@param string $pattern

@return array