How to create menu link programmatically in drupal 8 & 9

How to create menu link programmatically in drupal 8 & 9

If you would like to create module-defined menu links, add something like this example to your MODULENAME.links.menu.yml file:

example.admin:
  title: 'Example Link'
  description: 'Description link'
  route_name: example.route_name
  weight: 10
  enabled: 0
  route_parameters: { key: 'value' }
  menu_name: account 
  options:
    query:
      uid: 1
    attributes:
      target: _blank
      class:
        - btn
        - btn-primary

Example how to use anchor links

example.anchor:
  title: "Contact"
  description: "Scroll to contact section"
  url: "internal:#contact"

Example 2:

In order to create a menu item automatically this can be placed in a hook_update_N on the file MODULENAME.install and will run when the database is updated (/update.php):

use Drupal\menu_link_content\Entity\MenuLinkContent;


$items = array(
  '1' => 'Menuitem 1',
  '2' => 'Menuitem 2',
  '3' => 'Menuitem 3'
);

foreach($items as $nid => $title) {
  $menu_link = MenuLinkContent::create([
    'title' => $title,
    'link' => ['uri' => 'internal:/node/' . $nid],
    'menu_name' => 'main',
    'expanded' => TRUE,
  ]);
  $menu_link->save();
}

You can also create an entire Menu programmatically:

\Drupal::entityTypeManager()
  ->getStorage('menu')
  ->create([
    'id' => 'menu_test',
    'label' => 'Test menu',
    'description' => 'Description text',
  ])
  ->save();