Most of us pass data from PHP to javascript variable available to all pages in Drupal 7 is by:

  
/**
 * Implements hook_init()
 */
function mymodule_init() {
  $computed_data = mymodule_get_data();
  drupal_add_js(array('mymodule_computed_data' => $computed_data), 'setting');
}
  

We can access this data in javascript by:

Drupal uses an externally-maintained repository the https://packagist.drupal-composer.org but this repo is scheduled to be deprecated in January 2017 by then we will be using https://packages.drupal.org/8 repo URL.

It is assumed that composer is already installed in your system. Make sure your composer version is 1.0.0 or higher, to check execute:

  
composer -V
  

If it is lower than version 1.0.0, update it by:

  
composer self-update
  

Change directory to your Drupal root path.

Using Smart IP's data source IP2Location binary database requires ip2location/ip2location-php library which contains API that reads its database file. This article will show how to setup this API using composer.

The following procedures are tested on my Linode server running Centos 7 64-bit Linux distribution.

1. First we will install composer:

Here are code snippets of creating internal and external links in Drupal 8 having query, fragment identifier (named anchor) and class attribute.

In Drupal 7, we can read the current user's custom data by:

  
global $user;
$user_obj = user_load($user->uid);
print_r($user_obj->data);
  

... and write by:

  
global $user;
$user_obj = user_load($user->uid);
user_save($user_obj, array('data' => array('key' => $value)));
  

Now in Drupal 8, we can read the current user's custom data by:

There are some instances that we need to alter the value of Views' field and add markup on its rendered output programmatically. The following codes shows how to achieve these tasks using hook_views_pre_render().

The Nginx+PHP FPM is the ideal web-server setup as this is more faster web service. This article should be a continuation of this article (just skip the "Configure Apache" section and if you are not using Virtualmin, skip the "Configure Virtualmin" section.).

The following procedures are tested on Linode server running Centos 7 64-bit Linux distribution.

This solution should apply to Drupal sites that uses Nginx as web server with PHP FPM and the Nginx configuration is based on perusio's Nginx configuration for running Drupal.