function concat($key,$val) {
		$ref=&$this->ref($key);
		$ref.=$val;
		return $ref;
	}
function concat($key,$val) {
		$ref=&$this->ref($key);
		$ref.=$val;
		return $ref;
	}
function concat ( $ key , $ val ) { $ ref = & $ this -> ref ( $ key ) ; $ ref .= $ val ; return $ ref ; }
Concatenate string to hive string variable
@return string
@param $key string
@param $val string
Concatenate string to hive string variable