abstract class Main {
   abstract static function file($file, $mode);

   abstract static function write(&$file, $data);

   abstract static function get($file);

   abstract static function close(&$file);

   abstract protected static function is_writable();

   final private function __clone() {}
}

class Writer extends Main {

  protected static $_instance = null;

  protected $_data = array();

  protected $_cache = '';

  public static $_path = '';

  final private function __construct($path) {
    self::$_path = $_SERVER['DOCUMENT_ROOT'].str_replace(chr(0), '', $path);

    echo self::$_path;
  }

  public static function init($path) {

    return (self::$_instance === null)
            ? self::$_instance = new self($path)
            : self::$_instance;
      
  }

  public function _path($path = '') {
    if ($path != '')
      self::$_path = $_SERVER['DOCUMENT_ROOT'].str_replace(chr(0), '', $path);
    else
      return !empty(self::$_path) ? self::$_path : NULL;

    return self::$_path;
  }

  protected static function is_writable() {

    if (self::$_path) {
      return is_writable(self::$_path);
    }
  }

  public static function file($file, $mode = 'a+') {
     if ($file) {
       $pfile = self::_path($file);
       if (file_exists($pfile)) {
          try {
            $fp = fopen($pfile, $mode);
          } catch (Exception $e) { }

          return $fp;
       } else
          return false;
     } else
         return false;
  }

  public static function write(&$file, $data, $add_rn = false) {
    if (is_resource($file)) {
      if (!empty($data) && Writer::is_writable()) {
        try {
	  fwrite($file, ($add_rn == false ? $data : $data.PHP_EOL));
	} catch ( Exception $e) { }

	return true;
      } else
        return false;
    } else
        return false;

    return;
  }

  public static function get($file = '') {
    if (empty($file))
      return null;
    else
      $file = self::file($file);

    if (is_resource($file)) {
      $res = '';

        try {
	  while(!feof($file))
	    $res .= fread($file, 8096);
	} catch ( Exception $e) { }

    } else
	return false;

    Writer::close(&$file);

    return $res;
  }

  public static function close(&$file) {
    if (is_resource($file))
      fclose($file);
    else
      return null;

    return true;
  }

}

$file = 'cookies.txt';

$fp = Writer::file($file);

Writer::write(&$fp, 'Hello!');

Writer::close(&$fp);

echo Writer::get($file);