SimplePie::get_items

	 *
	 * Uses `<itunes:image>`, `<atom:logo>`, `<atom:icon>`,
	 * `<image><title>` or `<image><dc:title>`
	 *
	 * @return string|null
	 */
	public function get_image_url()
	{
		if ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ITUNES, 'image'))
		{
			return $this->sanitize($return[0]['attribs']['']['href'], SIMPLEPIE_CONSTRUCT_IRI);
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ATOM_10, 'logo'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ATOM_10, 'icon'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_image_tags(SIMPLEPIE_NAMESPACE_RSS_10, 'url'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_image_tags(SIMPLEPIE_NAMESPACE_RSS_090, 'url'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_image_tags(SIMPLEPIE_NAMESPACE_RSS_20, 'url'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($return[0]));
		}

		return null;
	}


	/**
	 * Get the feed logo's link
	 *
	 * RSS 0.9.0, 1.0 and 2.0 feeds are allowed to have a "feed logo" link. This
	 * points to a human-readable page that the image should link to.
	 *
	 * Uses `<itunes:image>`, `<atom:logo>`, `<atom:icon>`,
	 * `<image><title>` or `<image><dc:title>`
	 *
	 * @return string|null
	 */
	public function get_image_link()
	{
		if ($return = $this->get_image_tags(SIMPLEPIE_NAMESPACE_RSS_10, 'link'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_image_tags(SIMPLEPIE_NAMESPACE_RSS_090, 'link'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_image_tags(SIMPLEPIE_NAMESPACE_RSS_20, 'link'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($return[0]));
		}

		return null;
	}

	/**
	 * Get the feed logo's link
	 *
	 * RSS 2.0 feeds are allowed to have a "feed logo" width.
	 *
	 * Uses `<image><width>` or defaults to 88.0 if no width is specified and
	 * the feed is an RSS 2.0 feed.
	 *
	 * @return int|float|null
	 */
	public function get_image_width()
	{
		if ($return = $this->get_image_tags(SIMPLEPIE_NAMESPACE_RSS_20, 'width'))
		{
			return round($return[0]['data']);
		}
		elseif ($this->get_type() & SIMPLEPIE_TYPE_RSS_SYNDICATION && $this->get_image_tags(SIMPLEPIE_NAMESPACE_RSS_20, 'url'))
		{
			return 88.0;
		}

		return null;
	}

	/**
	 * Get the feed logo's height
	 *
	 * RSS 2.0 feeds are allowed to have a "feed logo" height.
	 *
	 * Uses `<image><height>` or defaults to 31.0 if no height is specified and
	 * the feed is an RSS 2.0 feed.
	 *
	 * @return int|float|null