Render API callback: Checks if a field machine name is taken.

Parameters

$value: The machine name, not prefixed with 'field_'.

Return value

Whether or not the field machine name is taken.

File

drupal-7.x/modules/field_ui/field_ui.admin.inc, line 722

Administrative interface for custom field type creation.

Code

function _field_ui_field_name_exists($value) {
  // Prefix with 'field_'.
  $field_name = 'field_' . $value;

  // We need to check inactive fields as well, so we can't use
  // field_info_fields().
  return (bool) field_read_fields(array('field_name' => $field_name), array('include_inactive' => TRUE));
}