public function unregister($k)
	{
		if ( array_key_exists($k, $this->_items) )
		{
			$item = $this->_items[$k];
			unset($this->_items[$k]);
			return $item;
		}
		else
			return FALSE;
	}
public function unregister($k)
	{
		if ( array_key_exists($k, $this->_items) )
		{
			$item = $this->_items[$k];
			unset($this->_items[$k]);
			return $item;
		}
		else
			return FALSE;
	}
public function unregister ( $ k ) { if ( array_key_exists ( $ k , $ this -> _items ) ) { $ item = $ this -> _items [ $ k ] ; unset ( $ this -> _items [ $ k ] ) ; return $ item ; } else return FALSE ; }
Delete an item from cache

@param string $k Item key to remove
@return bool|mixed $item Returns the item removed or FALSE if item not found in cache
Delete an item from cache