Directory.php

<?php

namespace IjorTengab;

class Directory
{
	protected $path;
	protected $list = array();
	protected $filter_dir_only = false;
	protected $has_listing = false;
	
	public function __construct($path)
	{
		$this->path = $path;
	}
	public static function init($path) 
	{
		$object = new static($path);
		return $object;
	}
	public function filterDirOnly() 
	{
		$this->filter_dir_only = true;
		return $this;
	}
	public function refresh() 
	{
		$this->has_listing = false;		
		$this->filter_dir_only = false;		
		$this->list = array();		
	}
	public function list($regex = null) 
	{
		if ($this->has_listing) {
			return;
		}
		$this->has_listing = true;
		$list = scandir($this->path);
		$this->list = array_filter($list, function ($value) use ($regex) {
			switch ($value) {
				case '.':
				case '..':
					return false;
			}
			if ($this->filter_dir_only && !is_dir($this->path . DIRECTORY_SEPARATOR . $value)){
				return false;
			}
			if ($regex === null) {
				return true;
			}
			return preg_match($regex, $value);
		});
		unset($list);
		return $this;
	}
	public function isEmpty()
	{
		if ($this->has_listing === false) {
			$this->list();
		}
		return count($this->list) === 0 ? true : false;
	}
	
	public function each($callback)
	{
		foreach ($this->list as $value) {
			call_user_func($callback, $this->path . DIRECTORY_SEPARATOR . $value);
		}
	}
	
}

$path = 'W:\';
$regex = '/^\d{8}\s{1}/';
$fita = Directory::init($path)->filterDirOnly()->list($regex);
$fita->each(function($full_path){
	$each = Directory::init($full_path);
	if ($each->isEmpty()) {
		echo $full_path . PHP_EOL;
		// $from = $full_path;
		// $to = $full_path . ' - empty';
		// rename($from, $to);
	}
});