Contao\Controller::getContentElement PHP Method

    public static function getContentElement($intId, $strColumn = 'main')
    {
        if (is_object($intId)) {
            $objRow = $intId;
        } else {
            if (!strlen($intId) || $intId < 1) {
                return '';
            }
            $objRow = \ContentModel::findByPk($intId);
            if ($objRow === null) {
                return '';
            }
        }
        // Check the visibility (see #6311)
        if (!static::isVisibleElement($objRow)) {
            return '';
        }
        $strClass = \ContentElement::findClass($objRow->type);
        // Return if the class does not exist
        if (!class_exists($strClass)) {
            static::log('Content element class "' . $strClass . '" (content element "' . $objRow->type . '") does not exist', __METHOD__, TL_ERROR);
            return '';
        }
        $objRow->typePrefix = 'ce_';
        /** @var ContentElement $objElement */
        $objElement = new $strClass($objRow, $strColumn);
        $strBuffer = $objElement->generate();
        // HOOK: add custom logic
        if (isset($GLOBALS['TL_HOOKS']['getContentElement']) && is_array($GLOBALS['TL_HOOKS']['getContentElement'])) {
            foreach ($GLOBALS['TL_HOOKS']['getContentElement'] as $callback) {
                $strBuffer = static::importStatic($callback[0])->{$callback[1]}($objRow, $strBuffer, $objElement);
            }
        }
        // Disable indexing if protected
        if ($objElement->protected && !preg_match('/^\\s*<!-- indexer::stop/', $strBuffer)) {
            $strBuffer = "\n<!-- indexer::stop -->" . $strBuffer . "<!-- indexer::continue -->\n";
        }
        return $strBuffer;
    }