By chx on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
8.x
Issue links: 
https://www.drupal.org/node/2018731
Description: 

To check whether a field has data in it, in D7:

$has_data = field_has_data($field);

In D8:

$has_data = $field->hasData();