trackback() │ WP 0.71

Sends a Trackback.

Updates database when sending trackback to prevent duplicates.

No Hooks.

Returns

Int|false|null. Database query from update.

Usage

trackback( $trackback_url, $title, $excerpt, $post_id );

$trackback_url(string) (required)

URL to send trackbacks.

$title(string) (required)

Title of post.

$excerpt(string) (required)

Excerpt of post.

$post_id(int) (required)

Post ID.

Notes

• Global. wpdb. $wpdb WordPress database abstraction object.

Changelog

trackback() trackback code ^{WP 6.9.1}

function trackback( $trackback_url, $title, $excerpt, $post_id ) {
	global $wpdb;

	if ( empty( $trackback_url ) ) {
		return;
	}

	$options            = array();
	$options['timeout'] = 10;
	$options['body']    = array(
		'title'     => $title,
		'url'       => get_permalink( $post_id ),
		'blog_name' => get_option( 'blogname' ),
		'excerpt'   => $excerpt,
	);

	$response = wp_safe_remote_post( $trackback_url, $options );

	if ( is_wp_error( $response ) ) {
		return;
	}

	$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET pinged = CONCAT(pinged, '\n', %s) WHERE ID = %d", $trackback_url, $post_id ) );
	return $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET to_ping = TRIM(REPLACE(to_ping, %s, '')) WHERE ID = %d", $trackback_url, $post_id ) );
}