yii\helpers\BaseHtml::activeBooleanInput PHP Method

    protected static function activeBooleanInput($type, $model, $attribute, $options = [])
    {
        $name = isset($options['name']) ? $options['name'] : static::getInputName($model, $attribute);
        $value = static::getAttributeValue($model, $attribute);
        if (!array_key_exists('value', $options)) {
            $options['value'] = '1';
        }
        if (!array_key_exists('uncheck', $options)) {
            $options['uncheck'] = '0';
        }
        if (!array_key_exists('label', $options)) {
            $options['label'] = static::encode($model->getAttributeLabel(static::getAttributeName($attribute)));
        }
        $checked = "{$value}" === "{$options['value']}";
        if (!array_key_exists('id', $options)) {
            $options['id'] = static::getInputId($model, $attribute);
        }
        return static::$type($name, $checked, $options);
    }