a->get_folder('babamanya');

$el = scandir (MDIR . '/' . $this->folder);

class folder extends Controller
	{
	function get_folder()
		{
		$el = scandir ($this->folder);
			foreach ($el as $key => $value)
				if ($value == '.' || $value == '..' || 
!is_dir($this->folder.'/'.$el[$key])) unset($el[$key]);
		return $el;
		}
	function __set($var,$value)
		{
		if ($var == 'folder') $this->folder = MDIR.$value;
		}
	}

textbox1.text('Тут тукст') 

textbox1.text := 'тут текст'

if ($var == 'folder') 

$a->folder='babamanya';

class folder extends Controller
	{
	protected $dir;
	function get_folder()
		{
		$el = scandir ($this->dir);
			foreach ($el as $key => $value)
				if ($value == '.' || $value == '..' || 
!is_dir($this->dir.'/'.$el[$key])) unset($el[$key]);
		return $el;
		}
	function __set($var,$value)
		{
		if ($var == 'folder') $this->dir = MDIR.$value;
		}
	}

class folder extends Controller
{
    protected $dir;

    function get_folder() {

        $el = scandir ($this->dir);

        foreach ($el as $key => $value)
            if ($value == '.' || $value == '..' || 
                !is_dir($this->dir.'/'.$el[$key])) unset($el[$key]);

        return $el;
    }
	
    function __set($var,$value) {
        $this->dir = MDIR.$value;
    }
}

define('MDIR', 'так что не знаю с кем из нас беседа бесполезно, ');

class folder
{
    protected $dir;

    function get_folder() {
        echo $this->dir; 
    }
	
    function __set($var,$value) {
        $this->dir = MDIR.$value;
    }
}

$a = new folder;
$a->chush = 'KaFe';
$a->get_folder();

class folder extends Controller
{
    public $folder;
    public function __construct($folder)
    {
        $this->folder =  MDIR . '/' . $folder;
    }
    public function get_folders()
    {
        $el = scandir ($this->folder);
        foreach ($el as $key => $value)
            if ($value == '.' || $value == '..' || !is_dir($this->folder.'/'.$el[$key]))
                unset($el[$key]);
	return $el;
    }
}
$folder = new folder('blablabla');
$folder->get_folders();

class folder extends Controller
{
    public $folder;
    public function __construct($folder)
    {
        $this->set_folder($folder);
    }
    public function set_folder($folder)
    {
        $this->folder =  MDIR . '/' . $folder;
    }
    public function get_folders()
    {
        $el = scandir($this->folder);
        foreach ($el as $key => $value)
            if ($value == '.' || $value == '..' || !is_dir($this->folder . '/' . $el[$key]))
                unset($el[$key]);
	return $el;
    }
}
$folder = new folder('blablabla');
$folder->get_folders();
$folder->set_folder('dadada');
$folder->get_folders();

class W {

    private static $instance = NULL;
				private $cush = 'abc';

    private function __construct($var) {
        echo ' -1- ';
								$this->chush = $var;
    }
				
				static public function getInstance($var = null) {
        if(self::$instance == NULL){				  
            self::$instance = new W($var);
            return self::$instance;
        } else {
            return self::$instance;
        }
    }
				
				public function act() {
					    echo $this->chush;									
					}
								
				public function __destruct () {
				    echo ' -5- ';
				}
}	

class X {   
    
					public function action() {
					    W::getInstance()->act();
					    echo ' -3- ';									
					}
					
}
$var = ' -2- '; 
W::getInstance($var);

$b = new X;
$b->action();	

$c = new X;
$c->action();

class folder extends Controller
{
    public $folder;
    public function __construct($folder)
    {
        $this->set_folder($folder);
    }
    public function set_folder($folder)
    {
        $this->folder =  MDIR . '/' . $folder;
    }
    public function get_folders($folder = '')
    {
        if (!empty($folder)) $this->set_folder($folder);
        $el = scandir($this->folder);
        foreach ($el as $key => $value)
            if ($value == '.' || $value == '..' || !is_dir($this->folder . '/' . $el[$key]))
                unset($el[$key]);
	return $el;
    }
}
$folder = new folder('blablabla');
$folder->get_folders();
$folder->set_folder('dadada');
$folder->get_folders();
$folder->get_folders('nonono');

$a->folder = 'kernel';

$a->folder = 'kernel';

function __set($var,$value)
{
    if ($var == 'folder') $this->dir = MDIR.$value;
}

class A
{
    protected $Properties = array();
    public function __set($PropertyName, $PropertyValue)
    {
         $this->Properties[$PropertyName] = $PropertyValue;
    }
    public function __get($PropertyName)
    {
        if (!isset($this->Properties[$PropertyName])) return null;
        return $this->Properties[$PropertyName];
    }
}

class folder extends Controller
{
protected $property =array();

public function get_element()
	{
	if (is_dir($this->property['folder']))
		{
		$el = scandir ($this->property['folder']);
		foreach ($el as $key => $value)
			if ($value != '.' && $value != '..')
				{
				if (is_dir($this->property['folder'].'/'.$el[$key])) $dir[] = $el[$key];
					else $file[] = $el[$key];
				$array[] = $el[$key];
				}
			if ($this->property['type'] == 'dir') return $dir;
			if ($this->property['type'] == 'file') return $file;
		}
	return $array;
	}

function __set($var,$value)
	{
	if ($var == 'folder') $this->property[$var] = MDIR.$value; 
		else $this->property[$var] = $value; 
	}
}

class folder extends Controller
{
    const TYPEALL = -1;
    const TYPEDIRS = 0;
    const TYPEFILES = 1;
    protected $folder = MDIR;
    protected $list = array();
    
    protected function readFolder()
    {
        $this->list = array();
        $items = scandir ($this->folder);
        foreach ($items as $key => $value)
        {
            if ($value == '.' || $value == '..') { continue; }
	    if (is_dir($this->folder . '/' . $value)) 
                $this->list[self::TYPEDIRS][] = $value;
            else
                $this->list[self::TYPEFILES][] = $value;
        }
    }

    public function __construct($folder = '')
    {
        $this->setFolder($folder);
    }

    public function setFolder($folder = '')
    {
        if (is_dir(MDIR . '/' . $folder))
            $this->folder = MDIR . '/' . $folder;
        else
            $this->folder = MDIR;
        $this->readFolder();
    }

    public function getElements($type = self::TYPEALL, $folder = '')
    {
        if (!empty($folder)) $this->setFolder($folder);
        if ($type == self::TYPEDIRS || $type == self::TYPEFILES)
                return $this->list[$type];
        else
                return array_merge($this->list[self::TYPEDIRS], $this->list[self::TYPEFILES]);
    }
}

$folder = new folder('dadada');
$folder->getElements();
$folder->getElements(folder::TYPEDIRS);
$folder->getElements(folder::TYPEFILES, 'tututu');

        if (is_dir(MDIR . '/' . $folder))
            $this->folder = MDIR . '/' . $folder;
        else

class folder extends Controller
{
    const TYPEALL = -1;
    const TYPEDIRS = 0;
    const TYPEFILES = 1;
    protected $folder = MDIR;
    protected $list = array();
    protected $basefolder = ".";
    
    protected function readFolder()
    {
        $this->list = array();
        $items = scandir ($this->folder);
        foreach ($items as $key => $value)
        {
            if ($value == '.' || $value == '..') { continue; }
	    if (is_dir($this->folder . '/' . $value)) 
                $this->list[self::TYPEDIRS][] = $value;
            else
                $this->list[self::TYPEFILES][] = $value;
        }
    }

    public function __construct($basefolder = '', $folder = '')
    {
        if (!empty($basefolder)) $this->basefolder = $basefolder;
        $this->setFolder($folder);
    }

    public function setFolder($folder = '')
    {
        if (is_dir($this->basefolder . '/' . $folder))
            $this->folder = $this->basefolder . '/' . $folder;
        else
            $this->folder = $this->basefolder;
        $this->readFolder();
    }

    public function getElements($type = self::TYPEALL, $folder = '')
    {
        if (!empty($folder)) $this->setFolder($folder);
        if ($type == self::TYPEDIRS || $type == self::TYPEFILES)
                return $this->list[$type];
        else
                return array_merge($this->list[self::TYPEDIRS], $this->list[self::TYPEFILES]);
    }
}

$folder = new folder('./..', 'dadada');
$folder = new folder(MDIR, 'dadada');

$folder = new folder('', 'blabla');
$folder->getElements();

$list = get_folder_content();

define('CONTENT_FOLDERS', 1);
define('CONTENT_FILES',   2);
define('CONTENT_ALL',     3);

function get_folder_content( $path, $content_type )
{
    if ( !is_dir($path) ) {
        return FALSE;
    }
        
    $list = array();
    $items = scandir($path);
    foreach ( $items as $value ) {
        if ( $value == '.' || $value == '..' ) {
            continue;
        } elseif ( is_dir($path . '/' . $value) ) {
            $list[CONTENT_FOLDERS][] = $value;
        } else {
            $list[CONTENT_FILES][] = $value;
        }
    }

    if ( $content_type == CONTENT_FOLDERS || $content_type == CONTENT_FILES )
        return $list[$content_type];
    elseif ( $content_type == CONTENT_ALL ) {
        return array_merge($list[CONTENT_FOLDERS], $list[CONTENT_FILES]);
    } else {
        return FALSE;
    }
}

• Singleton
• Strategy