Drupal 7

Example 1 (for drupal 7)

Step 1. Add file brows

Create a simple js file in your module directory (called yourModuleName.js) and enter the following Javascript.

Hook Update Deploy Tools is a great contrib module help to make most of site deploy operations programmatically.
Link : https://www.drupal.org/project/hook_update_deploy_tools

Step 1. Install Tomcat And Solr Server (atlest 5.4.1)

Step 2. Install Solr Search API On your drupal

#Drush# drush en search_api_solr -y

Step 3. Copy solr core files

To set Drupal System variables you can use the $settings (on Drupal 8) and $conf (On Drupal 7) array of setting.php file.

Examples.

On Drupal 8

$settings['file_public_path'] = '/path/to/dir/public';

Basic php and drupal 7 / 8 Examples

1.
$string_out = html_entity_decode($string, ENT_QUOTES, 'UTF-8')
//Do not forget ENT_QUOTES and 'UTF-8', otherwise quotes will not decodes.

Methodes:

drush_invoke (For the current site)
drush_invoke($command, $arguments = array());

There are several methodes.

Change date format Using custom module.

Add html after a field

(#field_prefix and #field_suffix).

Drupal 8

Drupal 7

Get the node
$node = menu_get_object();

Get Path alias
$alias = drupal_get_path_alias();

If there no data, You can use field_update_field (tested on D7) Like: