Contao\Config::markModified PHP Method

    protected function markModified()
    {
        // Return if marked as modified already
        if ($this->blnIsModified === true) {
            return;
        }
        $this->blnIsModified = true;
        // Reset the top and bottom content (see #344)
        $this->strTop = '';
        $this->strBottom = '';
        // Import the Files object (required in the destructor)
        $this->Files = \Files::getInstance();
        // Parse the local configuration file
        if (static::$blnHasLcf) {
            $strMode = 'top';
            $resFile = fopen(TL_ROOT . '/system/config/localconfig.php', 'rb');
            while (!feof($resFile)) {
                $strLine = fgets($resFile);
                $strTrim = trim($strLine);
                if ($strTrim == '?>') {
                    continue;
                }
                if ($strTrim == '### INSTALL SCRIPT START ###') {
                    $strMode = 'data';
                    continue;
                }
                if ($strTrim == '### INSTALL SCRIPT STOP ###') {
                    $strMode = 'bottom';
                    continue;
                }
                if ($strMode == 'top') {
                    $this->strTop .= $strLine;
                } elseif ($strMode == 'bottom') {
                    $this->strBottom .= $strLine;
                } elseif ($strTrim != '') {
                    $arrChunks = array_map('trim', explode('=', $strLine, 2));
                    $this->arrData[$arrChunks[0]] = $arrChunks[1];
                }
            }
            fclose($resFile);
        }
    }