code: public function textInput($options = [])
      {
          $options = array_merge($this->inputOptions, $options);
  
          if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
              $this->addErrorClassIfNeeded($options);
          }
  
          $this->addAriaAttributes($options);
          $this->adjustLabelFor($options);
          $this->parts['{input}'] = Html::activeTextInput($this->model, $this->attribute, $options);
  
          return $this;
      }
docs: Renders a text input.
  This method will generate the `name` and `value` tag attributes automatically for the model attribute
  unless they are explicitly specified in `$options`.
  @param array $options the tag options in terms of name-value pairs. These will be rendered as
  the attributes of the resulting tag. The values will be HTML-encoded using [[Html::encode()]].
  
  The following special options are recognized:
  
  - `maxlength`: int|bool, when `maxlength` is set `true` and the model attribute is validated
  by a string validator, the `maxlength` option will take the value of [[\yii\validators\StringValidator::max]].
  This is available since version 2.0.3.
  
  Note that if you set a custom `id` for the input element, you may need to adjust the value of [[selectors]] accordingly.
  
  @return $this the field object itself.