function unshift($key,$val) {
		$ref=&$this->ref($key);
		array_unshift($ref,$val);
		return $val;
	}
function unshift($key,$val) {
		$ref=&$this->ref($key);
		array_unshift($ref,$val);
		return $val;
	}
function unshift ( $ key , $ val ) { $ ref = & $ this -> ref ( $ key ) ; array_unshift ( $ ref , $ val ) ; return $ val ; }
Add element to the beginning of hive array variable
@return mixed
@param $key string
@param $val mixed
Add element to the beginning of hive array variable