Parses the Open Graph (OG) Image from the provided HTML.

Description

See: https://ogp.me/.

Parameters

$meta_elementsarrayrequired

A multidimensional indexed array on success, else empty array.

• 0 string[]
  Meta elements with a content attribute.
• 1 string[]
  Content attribute’s opening quotation mark.
• 2 string[]
  Content attribute’s value for each meta element.

$urlstringrequired

The target website URL.

Return

Source

private function get_image( $meta_elements, $url ) {
	$image = $this->get_metadata_from_meta_element(
		$meta_elements,
		'property',
		'(?:og:image|og:image:url)'
	);

	// Bail out if image not found.
	if ( '' === $image ) {
		return '';
	}

	// Attempt to convert relative URLs to absolute.
	$parsed_url = parse_url( $url );
	if ( isset( $parsed_url['scheme'] ) && isset( $parsed_url['host'] ) ) {
		$root_url = $parsed_url['scheme'] . '://' . $parsed_url['host'] . '/';
		$image    = WP_Http::make_absolute_url( $image, $root_url );
	}

	return $image;
}

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