_publish_post_hook() WordPress Function

function _publish_post_hook( $post_id ) {
	if ( defined( 'XMLRPC_REQUEST' ) ) {
		/**
		 * Fires when _publish_post_hook() is called during an XML-RPC request.
		 *
		 * @since 2.1.0
		 *
		 * @param int $post_id Post ID.
		 */
		do_action( 'xmlrpc_publish_post', $post_id );
	}

	if ( defined( 'WP_IMPORTING' ) ) {
		return;
	}

	if ( get_option( 'default_pingback_flag' ) ) {
		add_post_meta( $post_id, '_pingme', '1', true );
	}
	add_post_meta( $post_id, '_encloseme', '1', true );

	$to_ping = get_to_ping( $post_id );
	if ( ! empty( $to_ping ) ) {
		add_post_meta( $post_id, '_trackbackme', '1' );
	}

	if ( ! wp_next_scheduled( 'do_pings' ) ) {
		wp_schedule_single_event( time(), 'do_pings' );
	}
}
Uses	Description
wp-includes/cron.php:wp_next_scheduled()	Retrieve the next timestamp for an event.
wp-includes/cron.php:wp_schedule_single_event()	Schedules an event to run only once.
wp-includes/plugin.php:do_action()	Calls the callback functions that have been added to an action hook.
wp-includes/option.php:get_option()	Retrieves an option value based on an option name.
wp-includes/post.php:xmlrpc_publish_post	Fires when _publish_post_hook() is called during an XML-RPC request.
wp-includes/post.php:get_to_ping()	Retrieve URLs that need to be pinged.
wp-includes/post.php:add_post_meta()	Adds a meta field to the given post.