File

drupal-6.x/modules/block/block.admin.inc, line 265

Admin page callbacks for the block module.

Code

function block_admin_configure_validate($form, &$form_state) {
  if ($form_state['values']['module'] == 'block') {
    if (empty($form_state['values']['info']) || db_result(db_query("SELECT COUNT(*) FROM {boxes} WHERE bid != %d AND info = '%s'", $form_state['values']['delta'], $form_state['values']['info']))) {
      form_set_error('info', t('Please ensure that each block description is unique.'));
    }
  }
}