Contao\DC_Table::__construct PHP Method

    public function __construct($strTable, $arrModule = array())
    {
        parent::__construct();
        /** @var SessionInterface $objSession */
        $objSession = \System::getContainer()->get('session');
        // Check the request token (see #4007)
        if (isset($_GET['act'])) {
            if (!isset($_GET['rt']) || !\RequestToken::validate(\Input::get('rt'))) {
                $objSession->set('INVALID_TOKEN_URL', \Environment::get('request'));
                $this->redirect('contao/confirm.php');
            }
        }
        $this->intId = \Input::get('id');
        // Clear the clipboard
        if (isset($_GET['clipboard'])) {
            $objSession->set('CLIPBOARD', array());
            $this->redirect($this->getReferer());
        }
        // Check whether the table is defined
        if ($strTable == '' || !isset($GLOBALS['TL_DCA'][$strTable])) {
            $this->log('Could not load the data container configuration for "' . $strTable . '"', __METHOD__, TL_ERROR);
            trigger_error('Could not load the data container configuration', E_USER_ERROR);
        }
        // Set IDs and redirect
        if (\Input::post('FORM_SUBMIT') == 'tl_select') {
            $ids = \Input::post('IDS');
            if (empty($ids) || !is_array($ids)) {
                $this->reload();
            }
            $session = $objSession->all();
            $session['CURRENT']['IDS'] = $ids;
            $objSession->replace($session);
            if (isset($_POST['edit'])) {
                $this->redirect(str_replace('act=select', 'act=editAll', \Environment::get('request')));
            } elseif (isset($_POST['delete'])) {
                $this->redirect(str_replace('act=select', 'act=deleteAll', \Environment::get('request')));
            } elseif (isset($_POST['override'])) {
                $this->redirect(str_replace('act=select', 'act=overrideAll', \Environment::get('request')));
            } elseif (isset($_POST['cut']) || isset($_POST['copy'])) {
                $arrClipboard = $objSession->get('CLIPBOARD');
                $arrClipboard[$strTable] = array('id' => $ids, 'mode' => isset($_POST['cut']) ? 'cutAll' : 'copyAll');
                $objSession->set('CLIPBOARD', $arrClipboard);
                // Support copyAll in the list view (see #7499)
                if (isset($_POST['copy']) && $GLOBALS['TL_DCA'][$strTable]['list']['sorting']['mode'] < 4) {
                    $this->redirect(str_replace('act=select', 'act=copyAll', \Environment::get('request')));
                }
                $this->redirect($this->getReferer());
            }
        }
        $this->strTable = $strTable;
        $this->ptable = $GLOBALS['TL_DCA'][$this->strTable]['config']['ptable'];
        $this->ctable = $GLOBALS['TL_DCA'][$this->strTable]['config']['ctable'];
        $this->treeView = in_array($GLOBALS['TL_DCA'][$this->strTable]['list']['sorting']['mode'], array(5, 6));
        $this->root = null;
        $this->arrModule = $arrModule;
        // Call onload_callback (e.g. to check permissions)
        if (is_array($GLOBALS['TL_DCA'][$this->strTable]['config']['onload_callback'])) {
            foreach ($GLOBALS['TL_DCA'][$this->strTable]['config']['onload_callback'] as $callback) {
                if (is_array($callback)) {
                    $this->import($callback[0]);
                    $this->{$callback[0]}->{$callback[1]}($this);
                } elseif (is_callable($callback)) {
                    $callback($this);
                }
            }
        }
        // Get the IDs of all root records (tree view)
        if ($this->treeView) {
            $table = $GLOBALS['TL_DCA'][$this->strTable]['list']['sorting']['mode'] == 6 ? $this->ptable : $this->strTable;
            // Unless there are any root records specified, use all records with parent ID 0
            if (!isset($GLOBALS['TL_DCA'][$table]['list']['sorting']['root']) || $GLOBALS['TL_DCA'][$table]['list']['sorting']['root'] === false) {
                $objIds = $this->Database->prepare("SELECT id FROM " . $table . " WHERE pid=?" . ($this->Database->fieldExists('sorting', $table) ? ' ORDER BY sorting' : ''))->execute(0);
                if ($objIds->numRows > 0) {
                    $this->root = $objIds->fetchEach('id');
                }
            } elseif (is_array($GLOBALS['TL_DCA'][$table]['list']['sorting']['root'])) {
                $this->root = $this->eliminateNestedPages($GLOBALS['TL_DCA'][$table]['list']['sorting']['root'], $table, $this->Database->fieldExists('sorting', $table));
            }
        } elseif (is_array($GLOBALS['TL_DCA'][$this->strTable]['list']['sorting']['root'])) {
            $this->root = array_unique($GLOBALS['TL_DCA'][$this->strTable]['list']['sorting']['root']);
        }
        $request = \System::getContainer()->get('request_stack')->getCurrentRequest();
        $route = $request->attributes->get('_route');
        // Store the current referer
        if (!empty($this->ctable) && !\Input::get('act') && !\Input::get('key') && !\Input::get('token') && $route == 'contao_backend' && !\Environment::get('isAjaxRequest')) {
            $session = $objSession->get('referer');
            $session[TL_REFERER_ID][$this->strTable] = substr(\Environment::get('requestUri'), strlen(\Environment::get('path')) + 1);
            $objSession->set('referer', $session);
        }
    }