How to add a base/front slug/url to specific post types?

Question

I currently have:

mywebsite.com/custom-post-type-1/postname

mywebsite.com/custom-post-type-2/postname

I want to achieve:

mywebsite.com/my-base-slug/custom-post-type-1/postname

mywebsite.com/my-base-slug/custom-post-type-2/postname

I do not want "my-base-slug" to appear for anything other than those specified post-types.

Is that possible and how?

Answer 1

You can achieve this with the slug argument when you register your post type.

$args = array(
    'rewrite' => array( 'slug' => 'my-base-slug/custom-post-type-1' ),
    // your other args...
);
register_post_type( 'mycpt', $args );

Answer 2

If you are fine with using a plugin, just have a look at Custom Post Type Permalinks or Permalinks Customizer.