Drupal 8 - Programmatically disable or enable link on main navigation - php

Question

This concerns Drupal 8.
I'm trying to manage a link item on the main navigation. I want to enable/disable an item, programmatically.
I searched but cannot find how to do that. I found MenuLinkManager, MenuLinkContent, but I can't do what I want.
Thank you all for your help.

Answer 1

Assuming you actually want to remove the link I would use hook_menu_links_discovered_alter()
For example:
/**
* Implements hook_menu_links_discovered_alter().
*
* #param array $links
* An array of links.
*/
function HOOK_menu_links_discovered_alter(array &$links): void {
unset($links['machine_name_to_remove']);
}

Answer 2

To Disable/Enable Menu items means show/hide it. So, we can do it via below code in theme file
/**
* Implements hook_preprocess_menu().
*/
function theme_preprocess_menu(&$variables) {
if (isset($variables['menu_name']) && $variables['menu_name'] === 'main') {
foreach($variables['items'] as $key => $item) {
$path = $item['url']->toString();
switch($path) {
case '/menupath':
unset($variables['items'][$key]); //Remove menu item
break;
}
}
}
}

Answer 3

You can install the module Special Menu Items
https://www.drupal.org/project/special_menu_items
Or do it in your theme_link function in your template.php
function myTheme_link($variables) {
if ((isset($variables['path']) && ($variables['path'] == $_GET['q'] || ($variables['path'] == '<front>' && drupal_is_front_page())))) {
return ($variables['options']['html'] ? $variables['text'] : check_plain($variables['text']));
} else {
return '<a href="' . check_plain(url($variables['path'], $variables['options'])) . '"' . drupal_attributes($variables['options']['attributes']) . '>' . ($variables['options']['html'] ? $variables['text'] : check_plain($variables['text'])) . '</a>';
}
}

Answer 4

You need to exclude the menu from cache if you are going to alter it dynamically:
/**
* Implements hook_preprocess_HOOK().
*/
function YOUR_MODULE_preprocess_menu(&$variables) {
foreach ($variables['items'] as $key => $item) {
if ($key == 'depot_opm.document_demande_existant_tabs') {
unset($variables['items'][$key]);
}
}
}
/**
* Implements hook_preprocess_HOOK().
*/
function YOUR_MODULE_preprocess_block(&$variables) {
// Disable the cache of the menu block.
if($variables['derivative_plugin_id'] == 'tabs-documents') {
$variables['#cache']['max-age'] = 0;
}
}

Answer 5

This is what worked for me: tested with Drupal 9.3.9 (April 2022).
/**
* Implements hook_menu_links_discovered_alter().
*/
function MY_MODULE_menu_links_discovered_alter(&$links) {
$links['standard.front_page']['enabled'] = 0;
}