function hook_field_widget_form_alter

Alter forms for field widgets provided by other modules.

Parameters

$element: The field widget form element as constructed by hook_field_widget_form().

$form_state: An associative array containing the current state of the form.

$context: An associative array containing the following key-value pairs, matching the arguments received by hook_field_widget_form():

• form: The form structure to which widgets are being attached. This may be a full form structure, or a sub-element of a larger form.
• field: The field structure.
• instance: The field instance structure.
• langcode: The language associated with $items.
• items: Array of default values for this field.
• delta: The order of this item in the array of subelements (0, 1, 2, etc).

See also

hook_field_widget_form()

hook_field_widget_WIDGET_TYPE_form_alter()

Related topics

File

core/modules/field/field.api.php, line 933

Hooks provided by the Field module.

Code

function hook_field_widget_form_alter(&$element, &$form_state, $context) {
  // Add a css class to widget form elements for all fields of type mytype.
  if ($context['field']['type'] == 'mytype') {
    // Be sure not to overwrite existing attributes.
    $element['#attributes']['class'][] = 'myclass';
  }
}