class TemplateEngine 
{ 
    var $res=''; 
    
    function TemplateEngine($filename_OR_String)
    {
        if (file_exists($filename_OR_String))
            $this->res=file_get_contents($filename_OR_String);
        else $this->res=$filename_OR_String;
        return $this;
    }

    function add($varName, $value)
    {
        $this->res=str_replace('%%'.$varName.'%%', $value, $this->res);
    }

    function parse() {return $this->res;}
}