/**
* Adds oEmbed discovery links in the head element of the website.
*
* @since 4.4.0
*/
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.
*/