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According to this description of hook_preprocess_views_view_field(), $variables contains, among other things, $variables['field'].
However, if I do print_r($variables['field']) just to inspect the object it prints the entire object (to include my username and password!) and even causes the browser to crash.
I am trying to figure out how to check the field name but it is proving to be strangely non-straightforward.
How can I properly index $variables?
The browser is likely crashing because most of the views objects have circular references in them, and the output can be huge.
$variables['field'] is the field handler object for the field being rendered. I am 97% sure these are all derived from \Drupal\views\Plugin\views\field\FieldPluginBase() (3% uncertainty because it is the end of the day and I am really tired).
You best bet is to do a debug(get_class($variables['field'])) to get the fully qualified class name, and then typehint in your preprocess, eg:
function MYMODULE_preprocess_views_view_field(&$variables) {
/** @var \Drupal\views\Plugin\views\field\Boolean $field */
$field = $variables['field'];
}
and then use your IDE to navigate through what you need to do.
To see what is in $variables, just do a
debug(array_keys($variables));
and go through a similar exercise to get the types; it's just a boring associative array where the keys are all strings.
debug(get_class($variables['field'])) produces Drupal\views\Plugin\views\field\Field. debug(array_keys($variables)) produces Array ( [0] => view [1] => field [2] => row [3] => theme_hook_original [4] => attributes [5] => title_attributes [6] => content_attributes [7] => title_prefix [8] => title_suffix [9] => db_is_active [10] => is_admin [11] => logged_in [12] => user [13] => directory [14] => output )
Oct 15, 2015 at 11:33
With this code you will get the field name:
$variables['field']->field
or you could also want
$variables['field']->realField
