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wp_oembed_add_discovery_links()

Adds oEmbed discovery links in the website .

Source

File: wp-includes/embed.php 

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

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.

Changelog

Version Description
4.4.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/wp_oembed_add_discovery_links