WordPress at a glance
function is not described

wp_ajax_get_permalink() WP 3.1.0

Ajax handler to retrieve a permalink.

No Hooks.

Return

Nothing (null).

Usage

wp_ajax_get_permalink();

Code of wp ajax get permalink: wp-admin/includes/ajax-actions.php VER 5.0.3

<?php
function wp_ajax_get_permalink() {
	check_ajax_referer( 'getpermalink', 'getpermalinknonce' );
	$post_id = isset($_POST['post_id'])? intval($_POST['post_id']) : 0;
	wp_die( get_preview_post_link( $post_id ) );
}