show_file.php

function show_files($dir_name, $regexp = '/^([^.])/') {
	$files = preg_grep($regexp, scandir($dir_name));

	if ($regexp != '/^([^.])/') {
		$files = preg_grep('/^([^.])/', scandir($dir_name));
	}

	if ($key_del = array_search('key.txt', $files)) {
		unset($files[$key_del]);
	}
	
	return set('files', $files);
}