Check if field exists in a node <?php $entity->hasField('abc'); ?> Get value of a field: <?php use Drupal\node\Entity\Node $title = Node::load($nid)->get('title')->value; $node = \Drupal::entityManager()->getStorage('node')->load($nid); //Another way to load ?> For User Added fields: <?php $terms = $node->get('abc')->getValue(); $terms = $node->abc->getValue(); ?> Get Nid from URL <?php $nid = \Drupal::routeMatch()->getRawParameter($node_id); ?> -- Link https://www.frobiovox.com/posts/2016/03/28/simplify-drupal-8-field-value-calls.ht

Link: http://www.eilyin.name/note/database-queries-drupal-8-7

Checking Passphrase for private key:
openssl rsa -check -in keyfilename
Changing Passphrase:
openssl rsa -des3 -in keyfilename -out newkeyfilename
Installing or trusting certificates: Extensions .crt, .pem and .cer are interchangeable, just change the file name extension, they have the same form. Try this: sudo cp mycert.cer /usr/share/ca-certificates/mycert.pem
sudo dpkg-reconfigure ca-certificates
sudo update-ca-certificates

Views Bulk Operations come handy when doing bulk operations over a selected list. This is great because it combines the power of views to filter the selection and specific actions to do on each selected entity.

Templates are the default option for hook_theme: https://www.drupal.org/node/2231673 Advanced Theme Settings Change Record: https://www.drupal.org/node/2382645 Drupal 8 theming guide: https://www.drupal.org/theme-guide/8

This post would reflect on few essential APIs in Drupal 7 and how they were changed in Drupal 8: drupal_get_title()
: Gets the title of the current page. Link to changelog here . Drupal 7: <?php $title = drupal_get_title(); ?> Drupal 8: <?php $request = \Drupal::request(); $route_match = \Drupal::routeMatch(); $title = \Drupal::service('title_resolver')->getTitle($request, $route_match->getRouteObject()); ?> -- Links: https://www.drupal.org/node/2067859

Drupal 8 has done a great overhaul in terms of entity management. Lets have a look on how can be access and set data for fields in entities. All entities implement
Drupal\Core\Entity\EntityInterface

OPcache is an opcode cache for PHP. It is bundled with PHP 5.5.0 and later. The following settings work really well with Drupal. For Ubunti 14.04 , these following file can be modified to incorporate the changes /etc/php5/apache2/php.ini
Configuration: opcache.enable=1
opcache.memory_consumption=256
opcache.max_accelerated_files=4000
opcache.revalidate_freq=60
opcache.fast_shutdown=1

Drupal provides nice theming options for table display. However, various options available using tabular display are not documented well.

This problem particularly occurs when the views is upgraded to 3.x in Drupal 6.