Documentation & API reference
function hook_field_is_empty
Define what constitutes an empty item for a field type.
Parameters
$item: An item that may or may not be empty.
$field: The field to which $item belongs.
Return value
TRUE if $field's type considers $item not to contain any data; FALSE otherwise.
Related topics
12 functions implement hook_field_is_empty()
Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.
- datetime_field_is_empty in drupal/
core/ modules/ datetime/ datetime.module - Implements hook_field_is_empty().
- email_field_is_empty in drupal/
core/ modules/ email/ email.module - Implements hook_field_is_empty().
- entity_reference_field_is_empty in drupal/
core/ modules/ entity_reference/ entity_reference.module - Implements hook_field_is_empty().
- field_test_field_is_empty in drupal/
core/ modules/ field/ tests/ modules/ field_test/ field_test.field.inc - Implements hook_field_is_empty().
- file_field_is_empty in drupal/
core/ modules/ file/ file.field.inc - Implements hook_field_is_empty().
File
- drupal/
core/ modules/ field/ field.api.php, line 664
Code
function hook_field_is_empty($item, $field) {
if (empty($item['value']) && (string) $item['value'] !== '0') {
return TRUE;
}
return FALSE;
}