public function get_keyword($key = 0)
	{
		$keywords = $this->get_keywords();
		if (isset($keywords[$key]))
		{
			return $keywords[$key];
		}

		return null;
	}
public function get_keyword($key = 0)
	{
		$keywords = $this->get_keywords();
		if (isset($keywords[$key]))
		{
			return $keywords[$key];
		}

		return null;
	}
public function get_keyword ( $ key = 0 ) { $ keywords = $ this -> get_keywords ( ) ; if ( isset ( $ keywords [ $ key ] ) ) { return $ keywords [ $ key ] ; } return null ; }
Get a single keyword

@param int $key
@return string|null
Get a single keyword