How to create custom module in Drupal

To apply a patch in Drupal, follow the steps given below: Obtain the

.patch

file from Drupal's issue queue or the project page In your terminal, go to the directory where the module or theme you want to patch is located, e.g.,

cd /path/to/drupal/modules/contrib/my_module

Use the

git apply

command (recommended if you're using Git) or

 patch

command: For

Git 

For

 patch 

After applying the patch, clear Drupal’s cache to ensure changes take effect. You can do this via the admin interface or using Drush:

Verify that the patch resolves the issue or introduces the desired functionality.

To create a module in Drupal, follow the steps given below: Navigate to

modules/custom/

in your Drupal installation and create a new folder for your module. Example:

 my_module 

. Inside your module folder, create an info file,

my_module.info.yml

, which tells Drupal about your module:

Create a

my_module.module

file for your module's custom logic (if needed). This file can contain hook implementations. If your module needs custom routes (like for a page), create a

my_module.routing.yml

file:

If you added a route, create a controller in

src/Controller/MyModuleController.php

Go to the Extend menu in Drupal's admin dashboard, find your module, and enable it.

To disable caching in Drupal, follow the steps given below: 

Copy the file

 /sites/example.settings.local.php 

to

 /sites/default/settings.local.php

In the

 settings.php 

file, uncomment the following line to include the settings file:

Ensure the following line is uncommented in

settings.local.php 

:

Disable CSS/JS aggregation by setting these configurations:

Disable render and dynamic page caching:

Ensure Twig debugging and caching are set correctly in

 development.services.yml 

:

This will disable caching and is ideal for development. However, remember to re-enable caching for production environments.

To add menu in Drupal, follow the steps given below:

• Open your Drupal account
• Press on the Administer link
• Press the Menus link
• Press on the Add Menu
• Name the menu
• Input the title of the new menu
• Hit Save
• Add items to the menu
• Enter the path this menu item links to
• Input a title for the menu link
• Input a description if required
• Ensure that you have the proper menu selected as your parent item
• Hit Save
• Add more menu items if required
• Find the created Menu
• Activate it by configuring its location
• Press on Save blocks to save the configuration

Drupal is written primarily in PHP.