wp site url link from admin

1<?php
2  echo '<a href="' . esc_url( admin_url('nav-menus.php') ) . '">' . esc_html( 'Add Menu' ) . '</a>';
3?>

1$url = site_url( '/secrets/', 'https' );
2echo $url;
3//Output: https://www.example.com/secrets/ or https://www.example.com/wordpress/secrets/

1$url = site_url( '/secrets/', 'https' );
2echo $url;
3