function hook_field_formatter_view

Build a renderable array for a field value.

Parameters

$entity_type: The type of $entity.

$entity: The entity being displayed.

$field: The field structure.

$instance: The field instance.

$langcode: The language associated with $items.

$items: Array of values for this field.

$display: The display settings to use, as found in the 'display' entry of instance definitions. The array notably contains the following keys and values;

• type: The name of the formatter to use.
• settings: The array of formatter settings.

Return value

A renderable array for the $items, as an array of child elements keyed: by numeric indexes starting from 0.

Related topics

File

core/modules/field/field.api.php, line 1225

Hooks provided by the Field module.

Code

function hook_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
  $element = array();
  $settings = $display['settings'];

  switch ($display['type']) {
    case 'sample_field_formatter_simple':
      // Common case: each value is displayed individually in a sub-element
      // keyed by delta. The field.tpl.php template specifies the markup
      // wrapping each value.
      foreach ($items as $delta => $item) {
        $element[$delta] = array('#markup' => $settings['some_setting'] . $item['value']);
      }
      break;

    case 'sample_field_formatter_themeable':
      // More elaborate formatters can defer to a theme function for easier
      // customization.
      foreach ($items as $delta => $item) {
        $element[$delta] = array(
          '#theme' => 'my_module_theme_sample_field_formatter_themeable',
          '#data' => $item['value'],
          '#some_setting' => $settings['some_setting'],
        );
      }
      break;

    case 'sample_field_formatter_combined':
      // Some formatters might need to display all values within a single piece
      // of markup.
      $rows = array();
      foreach ($items as $delta => $item) {
        $rows[] = array($delta, $item['value']);
      }
      $element[0] = array(
        '#theme' => 'table',
        '#header' => array(t('Delta'), t('Value')),
        '#rows' => $rows,
      );
      break;
  }

  return $element;
}