クラス yii\grid\DataColumn

                public function getDataCellValue($model, $key, $index)
{
    if ($this->value !== null) {
        if (is_string($this->value)) {
            return ArrayHelper::getValue($model, $this->value);
        }
        return call_user_func($this->value, $model, $key, $index, $this);
    } elseif ($this->attribute !== null) {
        return ArrayHelper::getValue($model, $this->attribute);
    }
    return null;
}

            

                protected function getHeaderCellLabel()
{
    $provider = $this->grid->dataProvider;
    if ($this->label === null) {
        if ($this->attribute === null) {
            $label = '';
        } elseif ($provider instanceof ActiveDataProvider && $provider->query instanceof ActiveQueryInterface) {
            /* @var $modelClass Model */
            $modelClass = $provider->query->modelClass;
            $model = $modelClass::instance();
            $label = $model->getAttributeLabel($this->attribute);
        } elseif ($provider instanceof ArrayDataProvider && $provider->modelClass !== null) {
            /* @var $modelClass Model */
            $modelClass = $provider->modelClass;
            $model = $modelClass::instance();
            $label = $model->getAttributeLabel($this->attribute);
        } elseif ($this->grid->filterModel !== null && $this->grid->filterModel instanceof Model) {
            $label = $this->grid->filterModel->getAttributeLabel($this->filterAttribute);
        } else {
            $models = $provider->getModels();
            if (($model = reset($models)) instanceof Model) {
                /* @var $model Model */
                $label = $model->getAttributeLabel($this->attribute);
            } else {
                $label = Inflector::camel2words($this->attribute);
            }
        }
    } else {
        $label = $this->label;
    }
    return $label;
}

            

                public function init()
{
    parent::init();
    if ($this->filterAttribute === null) {
        $this->filterAttribute = $this->attribute;
    }
}

            

                protected function renderDataCellContent($model, $key, $index)
{
    if ($this->content === null) {
        return $this->grid->formatter->format($this->getDataCellValue($model, $key, $index), $this->format);
    }
    return parent::renderDataCellContent($model, $key, $index);
}

            

                protected function renderFilterCellContent()
{
    if (is_string($this->filter)) {
        return $this->filter;
    }
    $model = $this->grid->filterModel;
    if ($this->filter !== false && $model instanceof Model && $this->filterAttribute !== null && $model->isAttributeActive($this->filterAttribute)) {
        if ($model->hasErrors($this->filterAttribute)) {
            Html::addCssClass($this->filterOptions, 'has-error');
            $error = ' ' . Html::error($model, $this->filterAttribute, $this->grid->filterErrorOptions);
        } else {
            $error = '';
        }
        if (is_array($this->filter)) {
            $options = array_merge(['prompt' => '', 'strict' => true], $this->filterInputOptions);
            return Html::activeDropDownList($model, $this->filterAttribute, $this->filter, $options) . $error;
        } elseif ($this->format === 'boolean') {
            $options = array_merge(['prompt' => '', 'strict' => true], $this->filterInputOptions);
            return Html::activeDropDownList($model, $this->filterAttribute, [
                1 => $this->grid->formatter->booleanFormat[1],
                0 => $this->grid->formatter->booleanFormat[0],
            ], $options) . $error;
        }
        $options = array_merge(['maxlength' => true], $this->filterInputOptions);
        return Html::activeTextInput($model, $this->filterAttribute, $options) . $error;
    }
    return parent::renderFilterCellContent();
}

            

                protected function renderHeaderCellContent()
{
    if ($this->header !== null || $this->label === null && $this->attribute === null) {
        return parent::renderHeaderCellContent();
    }
    $label = $this->getHeaderCellLabel();
    if ($this->encodeLabel) {
        $label = Html::encode($label);
    }
    if (
        $this->attribute !== null && $this->enableSorting &&
        ($sort = $this->grid->dataProvider->getSort()) !== false && $sort->hasAttribute($this->attribute)
    ) {
        return $sort->link($this->attribute, array_merge($this->sortLinkOptions, ['label' => $label]));
    }
    return $label;
}