how to set Drupal Auto complete OFF

Question

I am new to drupal i want to set auto complete off in my following code

$form['plantuser']['username'] = array(
    '#type' => 'textfield',
    '#title' => t('Username'),
    '#description' => t(''),
    '#required' => true,
    '#maxlength' => 50,
     '#weight' =>1,
  );

Answer 1

That code doesn't enable Drupal's autocomplete (it would need the #autocomplete_path property to do so), so I guess you mean the browser autocomplete?

The standard way to do that is to set the autocomplete attribute on the element which you can do like this:

  $form['plantuser']['username'] = array(
    '#type' => 'textfield',
    '#title' => t('Username'),
    '#description' => t(''),
    '#required' => true,
    '#maxlength' => 50,
    '#weight' =>1,
    '#attributes' => array('autocomplete' => 'off'),
  );

Bear in mind autocomplete is only valid using the HTML5 doctype; if you're using another doctype you'll need to implement a JS solution to set the attribute instead, e.g.

(function($) {
  $(function() {
    $('#input-id').attr('autocomplete', 'off');
  });
})(jQuery);

Answer 2

the form does not have autocomplete feature by default.May be when you type in the field the the suggestions are populated from browser cache so you can test it again on other browser or on same brwoser after clearing the cache.

Answer 3

Another way to do this if you are only targeting one element and don't need an array:

your_module_form_alter(&$form, &$form_state, $form_id) {

    if ($form['#id'] == 'the_id_of_your_form'){
        $form['the_id_of_your_form']['#attributes']['autocomplete'] = 'off';
    }
}