Step 1: Setup

Create a directory in your sites/all/modules/custom_module

Create a file within your sites/all/modules/custom_module/ with custom_module.info

Write your module information in .info file

name=Custom Module description = "Custom Module" package = Custom Module core = 7.x version = 7.x ; ;These are additional fields of .info files. ; ;php = 5.6 ;dependencies[] = path

Step 2: Custom Block

Write this function in your .module file

/** * Implements hook_block_info. */ function custom_block_info() { $blocks['custom'] = array('info' => t('Custom block')); return $blocks; }

block_info : block_info is a hook. that tells the Drupal that your module provide block. hook_block_info() and for implementint it replace the hook with your module name. Like custom_block_info()

You can get more hook information from http://api.drupal.org/api/drupal/includes!module.inc/group/hooks/7

$blocks['custom'] : Drupal uses arrays extensively to store and pass information.

t() : Translates your text to current/given language (also adds extra security).

Step 3: Block Content

Always pass your strings through t() function. If you want to use variables, then pass them with placeholders. Like this:

/** * Implements hook_block_view. */ function custom_module_block_view($delta = '') { global $user; $account = $user; $block['content'] = t('Hello @user this is a block through your module. ',array( '@user' => format_username($user), )); return $block; }

hook_block_view : Retun a view for your block.

$delta : Unique identifier for your block.

format_username() : Function to format a username (returns Anonymous if there is no $user->name).

Step 4: Enable Module

Go to admin/module and fine cutom module and enable it.

Now go to admin/structure/block and find custom block and assign it where you want

Now you can see something like this in your block, where you have assigned it.