kartik\export\ExportMenu::initExport PHP Метод

    public function initExport()
    {
        $this->_provider = clone $this->dataProvider;
        if ($this->batchSize && $this->_provider->pagination) {
            $this->_provider->pagination = clone $this->dataProvider->pagination;
            $this->_provider->pagination->pageSize = $this->batchSize;
        } else {
            $this->_provider->pagination = false;
        }
        if ($this->initProvider) {
            $this->_provider->prepare(true);
        }
        $this->styleOptions = ArrayHelper::merge($this->_defaultStyleOptions, $this->styleOptions);
        $this->filterModel = null;
        $this->setDefaultExportConfig();
        $this->exportConfig = ArrayHelper::merge($this->_defaultExportConfig, $this->exportConfig);
        if (empty($this->filename)) {
            $this->filename = Yii::t('kvexport', 'grid-export');
        }
        $target = $this->target == self::TARGET_POPUP ? 'kvExportFullDialog' : $this->target;
        $id = ArrayHelper::getValue($this->exportFormOptions, 'id', $this->options['id'] . '-form');
        Html::addCssClass($this->exportFormOptions, 'kv-export-full-form');
        $this->exportFormOptions += ['id' => $id, 'target' => $target];
    }