"; protected $list= array(''); public function __construct( $str=NULL) { array_push($this->list,$str); } public function Append($str) { array_push($this->list,$str); return $this; } public function AppendLine($str) { array_push($this->list,$str.self::LINE); return $this; } public function AppendFormat($str, $args) { array_push($this->list, sprintf($str,$args)); return $this; } public function ToString() { return implode("",$this->list); } public function __destruct() { unset($this->list); } }