wp_oembed_add_discovery_links() WordPress Function

function wp_oembed_add_discovery_links() {
	$output = '';

	if ( is_singular() ) {
		$output .= '<link rel="alternate" type="application/json+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink() ) ) . '" />' . "\n";

		if ( class_exists( 'SimpleXMLElement' ) ) {
			$output .= '<link rel="alternate" type="text/xml+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink(), 'xml' ) ) . '" />' . "\n";
		}
	}

	/**
	 * Filters the oEmbed discovery links HTML.
	 *
	 * @since 4.4.0
	 *
	 * @param string $output HTML of the discovery links.
	 */
	echo apply_filters( 'oembed_discovery_links', $output );
}
Uses	Description
wp-includes/embed.php:get_oembed_endpoint_url()	Retrieves the oEmbed endpoint URL for a given permalink.
wp-includes/embed.php:oembed_discovery_links	Filters the oEmbed discovery links HTML.
wp-includes/formatting.php:esc_url()	Checks and cleans a URL.
wp-includes/query.php:is_singular()	Determines whether the query is for an existing single post of any post type (post, attachment, page, custom post types).
wp-includes/link-template.php:get_permalink()	Retrieves the full permalink for the current post or post ID.
wp-includes/plugin.php:apply_filters()	Calls the callback functions that have been added to a filter hook.